refrigeration system IEEE PAPER
Thermodynamic analysis of absorption refrigeration system based on entropy
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In this study, the first and second law thermodynamic analysis of a single-stage absorption refrigeration cycle with Water/lithium bromide as working uid pair is performed. Thermodynamic properties of each point in the cycle are calculated using related
Experimental study on Al2O3-R134a nano refrigerant in refrigeration system
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ABSTRACT: In this paper, an experimental work was investigated on nanorefrigerant. Nano Al2O3-PAG oil was used as nano-refrigerant in R134a vapour compression refrigeration system. An experimental setup was designed and fabricated in the lab. The system
Supermarket refrigeration system-benchmark for hybrid system control
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Abstract: Hybrid control has in the recent years drawn considerable attention in academia for its large number of theoretical and computational challenges. The control and computer science communities have proposed various methods to address some of the problems
Demand-side energy management of a cascade mine surface refrigeration system
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DEMAND-SIDE ENERGY MANAGEMENT OF A CASCADE MINE SURFACE REFRIGERATION SYSTEM AJ Schutte, R Pelzer, M Kleingeld North West University and consultants to HVAC International and TEMM InternationalEskom is currently unable to guarantee electricity
Thermodynamic simulation of a solar absorption refrigeration system generator Heat exchanger
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ABSTRACT A thermodynamic simulation of a solar absorption refrigeration cycle has been carried out. The binary mixture considered in the present investigation was . This simulation was performed in order to investigate the effect that the
Advanced exergetic analysis of a refrigeration system for liquefaction of natural gas
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ABSTRACT During the last years the total cost of LNG technology has decreased significantly due to improvements of the liquefaction process. However, many liquefaction plants that are still in operation use a three-cascade refrigeration system. In this paper, an
Hybrid control of a supermarket refrigeration system
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Abstract:This paper presents a non-linear model predictive control (NMPC) of a supermarket refrigeration system. This is a hybrid process involving switching nonlinear dynamics and discrete events, on/off manipulated variables, like valves and compressors,
A new thermally driven refrigeration system with environmental benefits
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ABSTRACT The pressure-exchange ejector offers the possibility of attaining a breakthrough in the level of performance of ejectors by means of utilizing nondissipative non-steady flow mechanisms. Yet, the device retains much of the mechanical simplicity of conventional
Performance testing of a cryogenic refrigeration system for HTS cables
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ABSTRACT A novel Cryogenic Refrigeration System (CRS) has been developed to provide the refrigeration for an in-grid 350 m HTS cable demonstration in Albany NY. Refrigeration is provided by a closed cycle refrigerator (cryocooler) with a nominal cooling capacity of 6
Method for analysis of synchronization applied to supermarket refrigeration system
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Abstract: Synchronisation arises in dynamical systems that are composed of a number of interconnected subsystems. In the paper synchronization in a particular application-a supermarket refrigeration system-is studied. The temperature control in supermarket
Exergy analysis and refrigerant effect on The operation and performance limits of a One stage vapor compression Refrigeration system
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Abstract. This paper deals with a comparative analysis of the refrigerant impact on the operation and performances of a one stage vapor compression refrigeration system. Parameters and factors affecting the performances (in terms of refrigeration power,
Hybrid NMPC of a supermarket refrigeration system using sequential optimization
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Abstract: Supermarket refrigeration systems are hybrid systems due to switching of the continuous dynamics and due to the presence of discretely switched actuators such as valves and compressors. The main control goal for these systems is to keep temperature
R-152a refrigeration system for mobile air conditioning
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ABSTRACT In recent years, climate protection has become as important as ozone layer protection was in the late 1980's and early 1990s. Concerns about global warming and climate change have culminated in the Kyoto Protocol, a treaty requiring its signatories to
Solar absorption refrigeration system using new working fluid pairs
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Abstract: Absorption refrigeration systems powered by solar energy increasingly attract research interests in the last years. In this study, thermodynamic analyses for different working fluid pairs are performed. A computer simulation model has been developed to
The Cryogenic refrigeration system for MICE
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The proposed cryogenic cooling system for MICE uses a single liquid helium refrigerator to cool the superconducting magnets, the liquid hydrogen absorbers, and the scintillating fiber detectors. It is proposed that the helium refrigerator cold box deliver two-phase helium at
Refrigeration system for the Atlas Experiment
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Abstract The proposed ATLAS detector for the 27 km circumference LHC collider is of unprecedented size and complexity. The magnet configuration is based on an inner superconducting solenoid and large superconducting air-core toroids (barrel and two end-
The Study on the Performance Characteristics of Superheating the Suction Vapor in NH3Refrigeration System
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Nomenclature in,: Refrigerant mass ow,[kg/h] mew: Cooling water ow of the condenser,[kg/h] To},: Chilled water temperature of the evaporator outlet,[C] TCW: Cooling water temperature of the condenser outlet,[C] P,: Suction pressure of the compressor,[bar]
Effect of coiled capillary tube pitch on vapour compression refrigeration systemperformance
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ABSTRACT The effects of various geometries of capillary tubes has been investigated by many researchers. Their studies were based on the coil diameters and lengths alone, with no particular attention placed on the effect of coil pitch. At present no information is
Analysis of adsorption refrigeration system using zeolite and methanol
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ABSTRACT Environmental protection initiatives by environmental agencies are necessitating the replacement of chlorofluorocarbons with benign working fluids. One of the sensitive areas affected is refrigeration and heat pump technology, where new working
Validation of a vapour compression refrigeration system design model
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ABSTRACT This paper presents the validation of a design model for vapour compression refrigeration systems developed by Akintunde (2004a). This model was used to design a vapour compression refrigeration system. The experimental set-up is made up of: a
Advanced exergetic analysis of a refrigeration system for liquefaction of natural gas
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Abstract: During the last years the total cost of LNG technology has decreased significantly due to improvements of the liquefaction process by developing new schematics with different mixtures as working fluids. However, many liquefaction plants, based on a three-
An ice rink refrigeration system based on CO2 as secondary fluid in copper tubes
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ABSTRACT This report is a study of the use of copper tubes with CO2 as heat transfer fluid in ice rink applications. Copper tubes can be rolled rather easily up to the required length which decreases installation cost and simplifies the procedure. A test ice rink was built at
Fault detection and isolation for a supermarket refrigeration system-part one: Kalman-filter-based methods
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Fault Detection and Isolation (FDI) using the Kalman Filter (KF) technique for a supermarket refrigeration system is explored. Four types of sensor fault scenarios, namely drift, offset, freeze and hard-over, are considered for two temperature sensors, and one type of
Investigations of Heat Recovery in Different Refrigeration System Solutions in Supermarkets
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Page 1. Investigations of Heat Recovery in Different RefrigerationSystem Solutions in Supermarkets Samer SawalhaSEK at KatrineholmThe main objective is to invistigate the cooling performance of different refrigerationsystem solutions in supermarkets
Theoretical analysis on the prediction of performance coefficient of two-stage cascaderefrigeration system using various alternative refrigerants
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Abstract: This paper presents a comparison of the refrigerants CFC-12, HCFC-22, CFC-502, and their alternatives, such as HFC-134a, HFC-152a, HFC-404A, HFC-407C, HC-290, HC- 600a, R717 (ammonia), and three mixtures composed of HFC-134a, HFC-152a, HC-600a,
Effects of Sub-Cooling on the performance of R12 alternatives in a domestic refrigeration system
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Abstract This paper presents experimental results of investigation of effects of sub-cooling on the performance of four ozone-friendly alternative refrigerants (R32, R152a, R143a, and R134a) in a domestic refrigeration system. The study was performed using a system
Thermodynamic investigation of two-stage absorption refrigeration system connected by a compressor
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Abstract: The present work is to analyze a two-stage cycle based on the ammonia-water absorption system, with intermediate compression. The two generators of the system are heated by geothermal energy at low temperature. The study shows that this system makes
Numerical modelling and analysis of a room temperature magnetic refrigeration system
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Abstract (max. 2000 char.): This thesis presents a two-dimensional mathematical model of an Active Magnetic Regenerator (AMR) system which is used for magnetic refrigeration at room temperature. The purpose of the model is to simulate a laboratory-scale AMR
Process options for nominal 2-K helium refrigeration system design
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ABSTRACT Nominal 2-K helium refrigeration systems are frequently used for superconducting radio frequency and magnet string technologies used in accelerators. This paper examines the trade-offs and approximate performance of four basic types of
Decoupled feedforward control for an air-conditioning and refrigeration system
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Abstract:Multiple control objectives must be met in order to satisfy the system capacity and efficiency requirements of air-conditioning and refrigeration (A/CR) systems. Moreover, in the HVAC industry, it is generally preferred to tune multiple single-input-single-output (
Distributed predictive control for complex hybrid system. the refrigeration systemexample
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Abstract: In this paper, a distributed model predictive control (DMPC) is applied to the supermarket refrigeration system benchmark specified by the HYCON project. This system is an example of continuous nonlinear system controlled by on/off variables. The aim of the
Comparative performance study of vapour compression refrigeration system with R22/R134a/R410A/R407C/M20
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Abstract Several refrigerants have emerged as substitutes to replace R22, the most widely used fluorocarbon refrigerants in the world. These include the environmentally–friendly hydrocarbon (HFC) refrigerants R134a, R410A, R407C and M20. In the present research
Improvement in enviromental performance of vapour compression refrigeration system by the model for environmental product development
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Life cycle thinking (as the base of EU legislation) incorporates all actors, materials and environmental aspects of products in their entire life cycle. Eco-design refers to systematic incorporation of environmental factors into the product design and development with the
Theoretical exergy analysis of HFO-1234yf and HFO-1234ze as an alternative replacement of HFC-134a in simple vapour compression refrigeration system
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Abstract:An Exergy method for theoretical analysis of a traditional vapour-compression refrigeration system equipped with liquid vapour heat exchanger (lvhe) for HFO-1234yf (2, 3, 3, 3-Tetrafluoropropene) and HFO-1234ze (trans-1, 3, 3, 3-tetrafluoroprop-1-ene), both
Impact of Refrigerant Charge over the Performance Characteristics of a Simple Vapour Compression Refrigeration System
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ABSTRACT Experimental investigation was done to find the role of capillary tube length and amount of refrigerant charge on the overall heat transfer coefficient in condenser and evaporator and actual COP of a simple vapour compression refrigeration system. It was
Conclusions on 8 years operation of the LEP 4.5 K refrigeration system at CERN
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Abstract After 11 years of operation the Large Electron/Positron collider (LEP) was stopped in November 2000. Since 1993 a cryogenic system has been used to supply up to 72 superconducting (SC) cavity modules, using four large liquid-helium refrigerators at 4.5 K.
The prediction of environment effect on the performance of a vapor compressionrefrigeration system in air conditioning application
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Abstract This investigation deals with the performance prediction of air conditioning unit. Theoretical and experimental studies were conducted to simulate the performance of vapor compression refrigeration cycle, using R-22 as a circulating refrigerant. The experimental
Energy analysis and performance evaluation of the adsorption refrigeration system
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A complete steady state thermodynamic differential analysis is developed for the adsorption- based refrigeration systems. The introduced thermodynamic model accurately represents the behaviour of adsorption cooling systems, based on a precise, reasonable, and clear
Development of a solar intermittent refrigeration system for ice production
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Abstract: A solar powered intermittent absorption refrigeration system has been developed
Fermilab energy saver refrigeration system tests
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The Energy Saver Refrigeration System is based on the concept of a central helium liquefier(5000 e/hr) providing liquid to 24 satellite refrigerators (966 W@ 4.6 K), which operate as amplifiers with a gain of 12. This concept" as tested, cooling two 125 m long
Performance analysis of a refrigeration system using nano fluid
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Abstract Evaporating heat transfer is very important in the refrigeration and airconditioning systems. HFC 134a is the mostly widely used alternative refrigerant in refrigeration equipment such as domestic refrigerators and air conditioners. Though the global
Availability assessment for aging refrigeration system by using Lz-transform
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Abstract This paper presents a case study of z L-transform method application to calculation of availability for complex aging refrigeration system. The system and its components can have different performance levels ranging from perfect functioning to complete failure and,
Exergoeconomic analysis of a double-effect lithium bromide-water absorption refrigeration system
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Abstract. This work present the thermoeconomic or exergoeconomic analysis of a double- effect absorption refrigeration system with the water-lithium bromide pair, operating with the direct combustion of natural gas. The method combines exergetic and economic analysis
Sensitivity-based predictive control of a large-scale supermarket refrigeration system
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Abstract: Today, many supermarket refrigeration systems are controlled by decentralized control systems that often lead to excessive starting and stopping of the compressors which drive the cooling cycle and, consequently, to a large wear of the process equipment. In our
Operation results of the KSTAR helium refrigeration system
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ABSTRACT The first plasma(100 kA of controllable plasma current for 100 ms) of KSTAR has been successfully generated in July 2008. The major outstanding feature of KSTAR compared to most other Tokamaks is that all the magnet coils are superconducting (SC),
Heat and mass transfer studies on 134 A-DMAC based falling film absorbers for absorptionrefrigeration system
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Abstract-: Absorber is an important component in Vapour Absorption Refrigeration System and its performance has greater influence in overall efficiency of absorption machines. Falling film heat and mass transfer in an absorber is greatly influenced by fluid properties,
Investigation of heat recovery in different refrigeration system solutions in supermarkets
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Abstract This is a study of heat recovery in different refrigeration system in supermarkets. It presents analysis of field measurement in two supermarkets; CO2 trans-critical system with heat pump and CO2 trans-critical system with heat recovery only in desuperheater. The
effect of different cooling techniques on quality parameters of herring in relation to Malaysian fisheries and design of refrigeration system suitable for Malaysian
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ABSTRACT A comparison of three different cooling systems was carried out with the environmental temperature at 2 C and 25 C using herring (Clupea harengus) as raw material. Ungutted herring was stored in flake ice, CSW, and liquid ice using uninsulated
Refrigeration tests of the cryogenic system and solenoid for the Fermilab Collider Detector'
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A refrigeration system for the5 m superconducting solenoid for the Collider Detector at Fermilab has been installed and operated with a dummy load. The nominal 600 W capacity'of the system was achieved in the initial test. The solenoid and integral control
Optimising control of a combined mine pumping and refrigeration system
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ABSTRACT Eskom's Demand Side Management (DSM) initiative has proven to be successful in managing the energy consumption of mine pumping and refrigeration systems. Due to the dependence of these systems on each other, introducing DSM to both systems
To study the effect of Sub-cooling and Diffuser on the Coefficient of Performance of Vapour Compression Refrigeration System
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ABSTRACT: This paper presents the concept of effect of Sub-cooling and Diffuser on the Coefficient of Performance of Vapour Compression Refrigeration System mainly carried out to improve the coefficient of performance of system. To improve the coefficient of
Investigation of R152a/R134a Mixture in Refrigeration System
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Abstract:In domestic refrigerators and refrigeration system the most widely used refrigerant is R134a. Refrigerant 134a has a high Global Warming Potential (GWP) of 1300. Hence an alternative for this refrigerant is to be identified. R152a is identified as an alternative to
Second law thermodynamic analysis of a solar single-stage absorption refrigeration system
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Abstract:-This paper deals with thermodynamic simulation and Second-Law analysis of single-stage solar driven absorption refrigeration system operating with Lithium bromide- water solution. A MatLab-based routine was developed to determine thermodynamic
A thermodynamic analysis of a solar-powered jet refrigeration system
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The article describes and analyzes a method of using solar energy to drive a jet refrigeration system. A new technique is presented in the form of a performance nomogram combining the energy and momentum equations to determine the performance characteristics. A
The Exergy (Availability) Analysis on the Solar Adsorption Refrigeration System Working around the Atmospheric Pressure
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Abstract This paper conducts the exergy (availability) analysis for the processes and the cycle of the solar adsorption refrigeration system working around the atmospheric pressure with inert gas (eg. Helium) in the vacuum system as the pressure-adjusting agent, and
Ice Rink Refrigeration System with CO2 as Secondary Fluid
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ABSTRACT CO2 as a phase changing secondary fluid has advantages compared to traditional secondary fluids where the low pumping power required is the most dominant. This technology has won much ground in the supermarket field in recent time. Among
Energy and exergy analysis of an ejector refrigeration system
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In this study we conducted an energy and exergy analysis of an ejector refrigeration system with different working fluids. The system operates on waste heat provided by the exhausted gas of an internal combustion engine. Four working fluids are studied: water, methanol,
Supermarket Refrigeration System
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Supermarkets are energy intensive commercial buildings with an average specific energy consumption of 1,000 kWh/m2/yr. Conventional multiplex refrigeration systems account for about 50% of this energy consumption and require large refrigerant charges: 1000 to
Field testing of an advanced low-charge supermarket refrigeration system
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Abstract A field test was conducted to compare the performance of multiplex and distributed supermarket refrigeration systems. Two supermarkets in the vicinity of Worcester, Massachusetts were the sites utilized for the field test. One store was equipped with a
A car air-conditioning system based on an absorption refrigeration cycle using energy from exhaust gas of an internal combustion engine
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Abstract Energy from the exhaust gas of an internal combustion engine is used to power an absorption refrigeration system to air-condition an ordinary passenger car. The theoretical design is verified by a unit that is tested under both laboratory and road-test conditions.
Laboratory tests of NH3/CO2 Cascade system for Supermarket Refrigeration
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ABSTRACT The development of a laboratory test rig of an NH3/CO2 cascade system is presented in this paper along with a theoretical model that simulates the performance of the system. The system solution under investigation replicates a medium size supermarket in
Experimental study on a new absorption refrigeration system using R134a+ 32/DMF
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Abstract A new heat-driven absorption refrigeration system is proposed to be used 40ºdeep-freezing. The mixture refrigerant R32/R134a and an absorbent DMF are used as its working fluid. An experimental apparatus has been setup. The characteristics of this new
Helium refrigeration system for a 100-GeV superconducting accelerator
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2 The great advantages of the resulting superconducting accelerator would be its higher maximum energy and its capability of operating at a higher duty cycle. Such an accelerator would have a profound impact on the methods and costs of high energy physics research.
Mathematical modeling and analysis of absorption refrigeration system using waste heat of diesel genset
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Abstract: The objective of this paper is to develop a program for thermodynamic analysis of a single effect absorption chiller using LiBr-H2O solution as working fluid. The working temperature of generator, absorber, condenser, evaporator and effectiveness of solution
ENERGY SAVINGS THROUGH LIQUID PRESSURE AMPLIFICATION IN A DAIRY PLANTREFRIGERATION SYSTEM
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The Dairy sector is one of the major refrigeration energy users in the food industry. Significant energy and financial savings can be achieved by adopting new refrigeration technologies and practices. One such technology which has been available on the market
Performance analysis of ejector refrigeration system with environment friendly refrigerant driven by exhaust emission of automobile
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ABSTRACT Ejector refrigeration is a thermally driven technology which utilizes low grade thermal energy for its operation. This paper experimentally investigates the performance analysis of ejector refrigeration system with R404A as refrigerant. The ejector refrigeration
Performance evaluation of vapour compression refrigeration system using double effect condensing unit (Sub-cooler)
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Cooling in industrial process, air-conditioning of buildings and refrigeration of perishable products are common practice throughout the world [1]. As pointed out in the study of [2],
Exergy analysis of a dual-mode refrigeration system for ice storage air conditioning
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ABSTRACT This paper introduces the dual-mode refrigeration system for ice storage air conditioning. A computational model relating to the exergy loss amount and loss rate is developed in each component of the refrigeration cycle loop. A case study is presented to
Refrigeration system for the Earth's oceans threatens to break down
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From October through the end of December 2006, high-tech drills penetrated to a depth of exactly 1,287.87 meters (4,225.3 feet) into the Ross Ice Shelf in the eastern Antarctic. The sediments that were brought to the surface with the drill core allow researchers to embark
A Performance comparison of vapour compression refrigeration system using various alternative refrigerants
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AbstractA performance analysis on a vapour compression refrigeration system with various refrigerants mixture of R152a, RE170, R600a, and R290 were done for various mixture ratios and their results were compared with R134a as possible alternative replacement. The
System simulation of automotive refrigeration cycles
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Numerical simulation in the automotive design process is gaining increasing significance. This also applies for thermodynamic and thermohydraulic systems ie also for the air conditioning system (HVAC) of an automotive vehicle. In order to optimize the efficiency of
Evaluation of Vapour Compression Refrigeration System Using Different Refrigerants-A Review
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Abstract-The performance of heat transfer is one of the most important research areas in the field of thermal engineering. There are a large number of refrigerants, which are used to transfer heat from low temperature reservoir to high temperature reservoir by using vapour
Application of a solar absorption refrigeration system for air conditioning of buildings
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This paper describes the Sofri project, a co-operation between Ceeran Ltd and The Delft University of Technology. The main objective of this project is to develop the necessary knowledge and experience to commercialize solar-assisted air conditioning and dehumidification
in Modeling of Neural Network for Predicting the Value of Specific Heat Capacity of Working Fluid Libr-H2o used in Vapour Absorption Refrigeration System
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ABSTRACT The objective of this work is to compare the two training functions TRAINBFG and TRAINBR for modeling the neural network, to predict the value of specific heat capacity of working fluid LiBr-H2O used in vapour absorption refrigeration system and this
Optimization of the thermodynamic model of a solar driven Aqua-ammonia absorptionrefrigeration system
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Abstract:-The aim of this study is to simulate a solar single effect ammonia-water absorption refrigeration system. The influences of operating conditions and effectiveness of heat exchanger on the thermal loads of components, coefficients of performance (COPc, COP)
Performance characteristics of vapour compression refrigeration system under real transient conditions
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Abstract The behavior of performance parameters of a simple vapour compression refrigeration system were studied while its working under transient conditions occurred during cooling of a fixed mass of brine from initial room temperature to sub-zero
Control system for heat exchangers fans in a refrigeration system
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Abstract: The paper presents a method for controlling evaporator and condenser fans in a refrigeration system. The refrigeration system includes a refrigerant circuit defined by a compressor, a condenser, a throttling device, and an evaporator. The system includes an
Absorption Solar Refrigeration System for Air Conditioning in the Yucatan Peninsula
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ABSTRACT Nowadays there is a great worldwide concern for the increase in energy demand and the associated emission of greenhouse gases from fossil fuel combustion. In tropical regions, the use of air conditioning systems for thermal comfort using fossil fuel to
Design of solar water cooler using aqua-ammonia absorption refrigeration system
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Solar energy is one of the most well known green sources of energy.
Water and nutrient use efficiency of a tomato crop as affected by two refrigerationmethods: external mobile shading and fog system
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Abstract High incident radiation levels during the spring-summer cropping cycles in Mediterranean greenhouses generate microclimates of high temperature and evaporative demand. The aim of this work is to study the effect of two refrigeration methods on the
Thermodynamic analyses of hydrocarbon refrigerants in a subcooling refrigeration system
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ABSTRACT In this study, the performance simulation of some hydrocarbon refrigerants (R290, R600 and R600a) as alternatives to R134a in refrigeration system with sub-cooling is conducted by thermodynamic calculation of performance parameters using the REFPROP
Performance Prediction of Solar Adsorption Refrigeration System by Ann
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This paper proposes a new approach for the performance analysis of a single-stage solar adsorption refrigeration system with activated carbon-R134a as working pair. Use of artificial neural network has been proposed to determine the performance parameters of the
Development and optimization of temperature control during reverse cycle and heating in a multi-zone refrigeration system
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ABSTRACT The operation of multi-zone refrigeration systems always generates the need to simultaneous use the cooling and heating modes, or a combination of these modes (reverse cycle), in any of the individual temperature controlled zones present. This paper describes
The Tesla Refrigeration System
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TESLA is a proposed superconducting electron linac of about 30 km length. Its active RF resonator cells are made of niobium which have to be cooled to a temperature of about 2 K in order to become superconducting. A large system for production and distribution of
Hydrophobic zeolite/methanol experiments on a lab scale refrigeration system with a thermally efficient coated heat exchanger
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Abstract In this paper, the experimental results of a lab scale adsorption chiller working with are presented and discussed. The main feature of this chiller is the innovative adsorbent bed consisting in a tube and shell heat exchanger (HEX
New air-conditioning and refrigeration magnetocaloric gas free system
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Abstract: In this paper is presented a new refrigeration system that does not use any refrigerant gas. This is an environmentally friendly and energy efficient system, based on a technological breakthrough: the gas free magnetocaloric refrigeration (MCR). A
Gas turbine integrated with a combined power and refrigeration closed system
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Closed-cycle gas turbines (CCGT) have numerous advantages, among which are the flexibility oi utilising waste heat at low and high temperatures. the possibility ol using a variety of fuels. the ability to use high pressures and thereby reduce the cost of
Optimal performance of an endoreversible solar driven sorption refrigeration system
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Abstract: This article deals with the thermodynamic optimization of a solar driven sorption refrigeration system. An externally irreversible but internally endo-reversible model has been employed to analyze the optimum conditions of a sorption cooling system driven by
Assessment of the subcooling capabilities of a thermoelectric device in a vapor compressionrefrigeration system
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The paper presents some theoretical results regarding the subcooling capabilities of a thermoelectric device. The refrigeration system taken into account uses the R-134a refrigerant; a constant refrigerant flow of 1.4 m3/h was considered for all the working
Experimental Investigation To Develop The Refrigeration System With Two Phases Condensing Ejector Along With Energy Saving
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Abstract:This experimental model presents a method of reduce energy consumption and enhance the refrigerating effect. With the help of two phases condensing ejector it is found that ejector work as sub compressor in refrigeration flow cycle. That helps to reduce
Parametric evaluation of a NH3/CO2 cascade system for supermarket refrigeration in laboratory environment
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ABSTRACT A refrigeration NH3/CO2 cascade system has been built in IUC laboratory in Katrineholm (Sweden). The system is equipped with extensive instrumentation in order to Abstract A refrigerant must be in the vapor-liquid phase in a vapor-compression refrigeration system, therefore, CO2 cannot be used as a refrigerant for temperatures lower than 256uC because solid CO2 will form under the triple point temperature of 256uC. A refrigeration
Improvement of energy utilization in natural Gas liquid plant through using self-refrigeration system
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Abstract: In recent years, there has been great incentive to improve the energy utilization with which the existing capital in offshore and onshore surface facilities is utilized. One of the most energy intensive processes in oil upstream industry is natural gas liquid or NGL
Experimental Assesment of Refrigeration System Characteristics with Scroll Compressor
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Abstract: In this study, characteristics of a chiller system are investigated. The experimental setup consist of an air cooled condenser, a liquid type shell-tube evaporator, and a scroll compressor. Compressor speed is changed between 30-60 Hz via PWM type frequency
Heat Exchanger for Hydrogen-Absorbing Alloy Refrigeration System
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ABSTRACT Hydrogen-absorbing alloys were applied to the development of various heat- utilization systems, such as heat-pump systems, heat transportation systems and refrigeration systems, for the effective use of heat. These materials were used to develop
The design and performance analysis of refrigeration system using R12 and R134a refrigerants
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ABSTRACT The design and performance analysis of refrigeration system using R12 R134a refrigerants are presented in this report. The design calculations of the suitable and necessary refrigerator equipment and their results are also reported here. CFC-12 is the
Development of an Experimental Apparatus for Demonstrating Vapour CompressionRefrigeration System
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Abstract This paper presents the design, construction and performance testing of a refrigeration system for use as experimental apparatus for demonstrating vapour compression refrigeration cycle and basic concepts of thermodynamic principles. The
Performance of a Transcritical N 2 O Refrigeration System with Internal Heat Exchangers
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Abstract:Use of internal heat exchanger in vapor compression refrigeration system is a conventional technique to improve the system performance. Energetic and exergetic analyses as well as discharge pressure optimization studies of a transcritical N2O
Simulation and performance evaluation of air-cooled finned-tube gas cooler for trans-critical carbon dioxide refrigeration system in Indian context
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ABSTRACT This paper presents, the mathematical modeling, validation and simulation of air- cooled finned tube gas cooler for trans-critical carbon dioxide (CO2) refrigeration system in typical Indian conditions. Environmental concerns and enactments of Montreal and Kyoto
Proposition of a new adsorption refrigeration system using activated carbon prepared from olive stones
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Abstract: The aim of the current paper is to propose a new solar adsorption refrigerator using a compound adsorbent fabricated from activated carbon issued from olive stones. High efficiency activated carbon (AC) with different chemical characteristic was prepared. It was
request a cooling system for an automobile based on vapour absorption system by using waste heat of ic engine
a refrigeration system for an automobile based on vapor ijesrt
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