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Absorption Refrigeration System

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Shiming Deng – One of the best experts on this subject based on the ideXlab platform.

  • Theoretical analysis of low-temperature hot source driven two-stage LiBr/H2O Absorption Refrigeration System
    International Journal of Refrigeration-revue Internationale Du Froid, 1999
    Co-Authors: Shiming Deng

    Abstract:

    Abstract A detailed theoretical analysis is presented for a two-stage LiBr/H2O Absorption Refrigeration System, which consists of an evaporator, a low-pressure absorber, a low-pressure generator, a high-pressure absorber, a high-pressure generator, a condenser, a low-pressure heat exchanger and a high-pressure heat exchanger, driven by a low-temperature hot source. A comparison of results from the theoretical analysis and preliminary experiment indicates that the theoretical analysis developed can represent a real System with a reasonable accuracy, and is useful for future development.

  • theoretical analysis of low temperature hot source driven two stage libr h2o Absorption Refrigeration System
    International Journal of Refrigeration-revue Internationale Du Froid, 1996
    Co-Authors: W B, Shiming Deng

    Abstract:

    Abstract A detailed theoretical analysis is presented for a two-stage LiBr/H2O Absorption Refrigeration System, which consists of an evaporator, a low-pressure absorber, a low-pressure generator, a high-pressure absorber, a high-pressure generator, a condenser, a low-pressure heat exchanger and a high-pressure heat exchanger, driven by a low-temperature hot source. A comparison of results from the theoretical analysis and preliminary experiment indicates that the theoretical analysis developed can represent a real System with a reasonable accuracy, and is useful for future development.

Pradeepta K. Sahoo – One of the best experts on this subject based on the ideXlab platform.

  • Thermodynamic Modeling and Performance Optimization of a Solar-Assisted Vapor Absorption Refrigeration System (SAVARS)
    International Journal of Air-conditioning and Refrigeration, 2020
    Co-Authors: Boris Huirem, Pradeepta K. Sahoo

    Abstract:

    A thermodynamic steady-state model for a single-effect lithium bromide–water (LiBr-H2O)-based vapor Absorption Refrigeration System of 17.5kW capacities has been presented using the first and secon…

  • Thermodynamic Modeling and Performance Optimization of a Solar-Assisted Vapor Absorption Refrigeration System (SAVARS)
    International Journal of Air-Conditioning and Refrigeration, 2020
    Co-Authors: Boris Huirem, Pradeepta K. Sahoo

    Abstract:

    A thermodynamic steady-state model for a single-effect lithium bromide–water (LiBr-H2O)-based vapor Absorption Refrigeration System of 17.5[Formula: see text]kW capacities has been presented using the first and second laws of thermodynamics. The mass, energy and exergy balance equations in each component of the vapor Absorption cycle have been fitted into a computer program to carry out the calculation using the thermo-physical properties of the working fluid. The performance parameters such as coefficient of performance (COP), exergy coefficient of performance (ECOP), total exergy destruction (TED), etc. have been evaluated considering different temperatures in generator and evaporator, different LiBr concentrations in the weak and strong LiBr-H2O solution and different solution heat exchanger effectiveness. The model evaluated the optimum performance parameters like COP, ECOP, TED, etc. of the vapor Absorption System by using Design Expert-12 software for an application like on-farm cooling or transit storage of fruits and vegetables.

Rajesh Kumar – One of the best experts on this subject based on the ideXlab platform.

  • Integration of Water-Lithium Bromide Absorption Refrigeration System with Diesel engine: A Thermodynamic Study
    , 2014
    Co-Authors: Rahul Singh, Supriya Vats, Neelam Baghel, Rajesh Kumar

    Abstract:

    This paper examines through a thermodynamic analysis the feasibility of using waste heat from Diesel engines to drive an ammonia-water Absorption Refrigeration System. An energy balance of a diesel engine shows that sufficient waste heat is provided. The results illustrate that higher performance of the System is obtained at generator temperature in near 361K for single effect and then starts decreases till 371K.

  • Exergy analysis of double effect vapor Absorption Refrigeration System
    International Journal of Energy Research, 2008
    Co-Authors: Abdul Khaliq, Rajesh Kumar

    Abstract:

    Energy and exergy analyses previously performed by the authors for a single effect Absorption Refrigeration System have been extended to double effect vapor Absorption Refrigeration System with the expectation of reducing energy supply as well as an interest in the diversification of the motive power employed by HVAC technologies. The total exergy destruction in the System as a percentage of the exergy input from a generator heating water over a range of operating temperatures is examined for a System operating on LiBr–H2O solution. The exergy destruction in each component, the coefficient of performance (COP) and the exergetic COP of the System are determined. It is shown that exergy destructions occur significantly in generators, absorbers, evaporator2 and heat exchangers while the exergy destructions in condenser1, evaporator1, throttling valves, and expansion valves are relatively smaller within the range of 1–5%. The results further indicate that with an increase in the generator1 temperature the COP and ECOP increase, but there is a significant reduction in total exergy destruction of the System for the same. On the other hand, the COP and ECOP decrease with an increase in the absorber1 temperature while the total exergy destruction of the System increases significantly with a small increase in the absorber1 temperature. The results show that the exergy method can be used as an effective criterion in designing an irreversible double effect Absorption Refrigeration System and may be a good tool for the determination of the optimum working conditions of such Systems. Copyright © 2007 John Wiley & Sons, Ltd.

  • Thermodynamic evalaution of a modified aqua-ammonia Absorption Refrigeration System
    Energy Conversion and Management, 1991
    Co-Authors: Rajesh Kumar, S C Kaushik

    Abstract:

    Abstract This short communication presents a modified version of the basic aqua-ammonia Absorption Refrigeration System. The heat released during the Absorption process is utilized to heat the strong solution coming out of the absorber. Thus, the heat required for further heating the solution in the generator is considerably reduced and, hence, yields enhanced coefficients of performance. Detailed thermodynamic analysis of the modified aqua-amonia Absorption System is carried out to study the effects of various operating parameters, such as generator temperature, condenser temperature, absorber temperature, rectification column and the effectiveness of the heat exchangers, on the COP and various heat/mass transfer rates. It is found that an improvement of about 10% in the COP for the modified Absorption cycle is achieved at an evaporator temperature of 0°C.