Comparative study of cycle performance for a two stage intermittent solar refrigerator working with R22-absorbent combinations
TL;DR: In this paper, an analysis of the thermodynamic cycle for a two-stage intermittent solar refrigerator is performed for R22DMF, R22-NMP, and R 22-DMETEG.
About: This article is published in Energy Conversion and Management.The article was published on 1996-01-01. It has received 4 citations till now. The article focuses on the topics: Thermodynamic cycle & Working fluid.
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TL;DR: A comprehensive literature review on absorption based refrigeration and air conditioning systems that are powered by solar energy is presented in this paper, along with their thermodynamic operating principle and experimental and numerical simulation studies.
Abstract: Recently, the traditional energy types have failed to satisfy the human needs because of their limited quantity as well as their negative environmental impacts. Conventional cold producing machines that are based on vapor compression principle are primary electricity consumers and their working fluids are being banned by international legislation. From this perspective, solar powered cooling systems as a green cold production technology are the best alternative. Absorption refrigeration is a mature technology that has proved its applicability with the possibility to be driven by low grade solar and waste heat. In this study, we present a comprehensive literature review on absorption based refrigeration and air conditioning systems that are powered by solar energy. Various systems along with their thermodynamic operating principle are presented. Moreover, the previous experimental and numerical simulation studies for these systems are discussed.
128 citations
TL;DR: In this paper, a detail review of the application of solar energy for refrigeration systems has been carried out, focusing especially on solar panel, desiccant fluid for icemaker and its components.
Abstract: Solar energy is one of the most efficient, clean and affordable energy alternatives available today. With the current concerns about global warming and ever increasing energy rates, countries are seriously looking for domestic and industrial usage of solar energy. In the present study, a detail review of the application of solar energy for refrigeration systems has been carried out. The utilization of solar energy for refrigeration systems would help in improvement of energy economics, energy consumption and energy efficiency. The review focuses especially on solar panel, desiccant fluid for icemaker and its components. The study also includes thermodynamic equation and material for making component of refrigeration to improve the coefficient of performance. Study around the economic evaluation and solar performance coefficient in the type of refrigerator, modeling and simulation, mathematical equation of heat transfer and type of absorption used are other topics that could be considered.
58 citations
TL;DR: In this paper, the first and second law analyses of a new solar-driven triple-effect refrigeration cycle using Duratherm 600 oil (Duratherm Extended Life Fluid, NY, USA) as the heat transfer fluid is performed.
Abstract: SUMMARY
This investigation is persuaded for the first and second law analyses of a new solar-driven triple-effect refrigeration cycle using Duratherm 600 oil (Duratherm Extended Life Fluid, NY, USA) as the heat transfer fluid is performed. The proposed cycle is an integration of ejector, absorption, and cascaded refrigeration cycles that could produce refrigeration output of different magnitude at different temperature simultaneously. Both exergy destruction and losses in each component and hence in the overall system are determined to identify the causes and locations of the thermodynamic imperfection. The effects of some influenced parameters such as hot oil outlet temperature, refrigerant turbine inlet pressure, and the evaporator temperature of ejector and cascaded refrigeration cycle have been observed on the first and second law performances. It is found that maximum irreversibility occurs in central receiver as 52.5% and the second largest irreversibility of 25% occurs in heliostat field. The second law efficiency of the solar driven triple effect refrigeration cycle is 2%, which is much lower than its first law efficiency of 11.5%. Analysis clearly shows that performance evaluation based on the first law analysis is inadequate and hence, more meaningful evaluation must be included in the second law analysis. Copyright © 2013 John Wiley & Sons, Ltd.
25 citations
Cites methods from "Comparative study of cycle performa..."
...Das and Mani [9] recommended the use of R22 and N,N-Dimethyl Formamide....
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...The theoretical and experimental coefficient of performance (COP)were found to be 0.6 and 0.4, respectively, at a generator temperature of 90 C. Das and Mani [9] recommended the use of R22 and N,N-Dimethyl Formamide....
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10 citations
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TL;DR: In this paper, a two-stage intermittent solar refrigeration system is described and the successful operation of the cycle under such conditions depends upon the proper selection of the initial solution concentrations in high and low pressure generators and the volume ratio of the generators.
5 citations