The Experts below are selected from a list of 273 Experts worldwide ranked by ideXlab platform

Saber Chemkhi - One of the best experts on this subject based on the ideXlab platform.

  • solar cooling with the absorption principle first and second Law Analysis of an ammonia water double generator absorption chiller
    Desalination, 2004
    Co-Authors: Ben N Ezzine, Saber Chemkhi
    Abstract:

    Abstract This article deals with the modelling, thermodynamic simulation and Second Law Analysis of an ammonia—water double-effect, double-generator absorption chiller. The Analysis of the unit established a simulation thermodynamic model as well as the limits of the operating conditions. Computer simulation was carried out in order to determine its stream properties and the amount of heat and work exchanged with the surroundings. Simulation results were then used to study the influence of the various operating parameters on the performance coefficient of the chiller. To quantify the irreversibility of each component of the chiller and to determine the potential for each component to contribute to overall system energy efficiency, the Second Law Analysis of thermodynamics was applied. Results indicated that the absorber, solution heat exchangers, and condenser have the most potential to improve chiller energy efficiency.

  • Solar cooling with the absorption principle: first and Second Law Analysis of an ammonia—water double-generator absorption chiller
    Desalination, 2004
    Co-Authors: Saber Chemkhi, Ahmed Bellagi
    Abstract:

    Abstract This article deals with the modelling, thermodynamic simulation and Second Law Analysis of an ammonia—water double-effect, double-generator absorption chiller. The Analysis of the unit established a simulation thermodynamic model as well as the limits of the operating conditions. Computer simulation was carried out in order to determine its stream properties and the amount of heat and work exchanged with the surroundings. Simulation results were then used to study the influence of the various operating parameters on the performance coefficient of the chiller. To quantify the irreversibility of each component of the chiller and to determine the potential for each component to contribute to overall system energy efficiency, the Second Law Analysis of thermodynamics was applied. Results indicated that the absorber, solution heat exchangers, and condenser have the most potential to improve chiller energy efficiency.

Marc A. Rosen - One of the best experts on this subject based on the ideXlab platform.

  • second Law Analysis approaches and implications
    International Journal of Energy Research, 1999
    Co-Authors: Marc A. Rosen
    Abstract:

    A comparison is presented of the main approaches to second-Law Analysis (SLA) reported in the literature. Five SLAs are considered: exergy, physical-exergy, exergy-consumption, negentropy and entropy analyses. The application of the SLAs is illustrated through an example. In addition, several significant implications of SLA are examined in the fields of environmental impact and economics. The presentation herein of the approaches to and implications of SLA is expected to enhance understanding of SLA and improve its usefulness. Copyright © 1999 John Wiley & Sons, Ltd.

  • Second‐Law Analysis: approaches and implications
    International Journal of Energy Research, 1999
    Co-Authors: Marc A. Rosen
    Abstract:

    A comparison is presented of the main approaches to second-Law Analysis (SLA) reported in the literature. Five SLAs are considered: exergy, physical-exergy, exergy-consumption, negentropy and entropy analyses. The application of the SLAs is illustrated through an example. In addition, several significant implications of SLA are examined in the fields of environmental impact and economics. The presentation herein of the approaches to and implications of SLA is expected to enhance understanding of SLA and improve its usefulness. Copyright © 1999 John Wiley & Sons, Ltd.

  • Second-Law Analysis of aquifer thermal energy storage systems
    Energy, 1999
    Co-Authors: Marc A. Rosen
    Abstract:

    The application of exergy (second-Law) Analysis to aquifer thermal energy storage (ATES) systems is investigated in order to facilitate proper assessments of overall system performances. An elementary ATES model is created, and the corresponding expressions are developed for efficiencies and for the quantities of energy and exergy that are injected and recovered. It is demonstrated that ATES performance measures based on exergy often are more useful and meaningful than those based on energy. Exergy efficiencies account for the temperatures associated with energy transfers to and from an ATES, as well as the quantities of energy transferred, and consequently provide a measure of how nearly ATES systems approach ideal thermodynamic performance. Energy efficiencies do not provide a measure of approach to ideal performance and, in fact, are often misleadingly high because some of the energy recovered can be at too low a temperature to be available for a useful purpose.

Hiroyuki Watanabe - One of the best experts on this subject based on the ideXlab platform.

Tahir Abdul Hussain Ratlamwala - One of the best experts on this subject based on the ideXlab platform.

Michel Pons - One of the best experts on this subject based on the ideXlab platform.

  • Second Law Analysis of adsorption cycles with thermal regeneration
    Journal of Energy Resources Technology-transactions of The Asme, 1996
    Co-Authors: Michel Pons
    Abstract:

    Adsorption processes can be used for operating environment-friendly refrigeration cycles. When combined with the thermal regeneration process, these cycles can have quite high performance. The second Law Analysis of the adsorption cycles with thermal regeneration is fully developed. The different heat transports between heat transfer fluid and adsorbent, between adsorbate and condenser/evaporator heat sources, and between heat transfer fluid and heat sources are analyzed. The entropy balance is then completely established. Consistency between the first Law and second Law Analysis is verified by the numerical values of the entropy productions. The optimal operation of an adsorber is then described, and the study of those optimal conditions lead to some correlation between the different internal entropy productions.