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Absorption Cooling

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Jinping Liu – One of the best experts on this subject based on the ideXlab platform.

  • Performance analysis of solar air cooled double effect LiBr/H2O Absorption Cooling system in subtropical city
    Energy Conversion and Management, 2014
    Co-Authors: Jinping Liu

    Abstract:

    Due to the absence of Cooling tower and independent on water, the air cooled solar double effect LiBr/H2O Absorption Cooling system is more convenient to be used in commercial building and household use. The performance with collector temperature is an important field for such system. The paper mainly deals with the performance with collector temperature for the solar air cooled double effect LiBr/H2O Absorption Cooling system in subtropical city. The parameters of system are: aperture area of collector array is 27 m2, tilted angle of collector with respect to the horizontal plane is 20 toward to south evaporator temperature is 5 °C and the Cooling capacity is 20 kW. The simulation is based on the meteorological data of monthly typical day which was summarized from a year round measured data. A corresponding parametric model was developed. The hourly and average performance with the collector temperature for monthly typical day was obtained and discussed. It was found that the suitable working range of inlet temperature of collector is 110–130 °C to improve performance and lower the risk of crystallization. The difference of hourly total efficiency in 9:00–16:00 is less, and the monthly total efficiency from May to October is approximate. The yearly performance of system including total efficiency, Cooling capacity per area of collector and solar fraction was given. Furthermore, the effect of effectiveness of heat exchanger and pressure drop on total efficiency and solar fraction was studied and compared. The paper can serve as a preliminary investigation of solar air cooled double effect LiBr/H2O Absorption Cooling system in subtropical city, and provides the foundation of further study.

  • performance analysis of solar air cooled double effect libr h2o Absorption Cooling system in subtropical city
    Energy Conversion and Management, 2014
    Co-Authors: Jinping Liu

    Abstract:

    Due to the absence of Cooling tower and independent on water, the air cooled solar double effect LiBr/H2O Absorption Cooling system is more convenient to be used in commercial building and household use. The performance with collector temperature is an important field for such system. The paper mainly deals with the performance with collector temperature for the solar air cooled double effect LiBr/H2O Absorption Cooling system in subtropical city. The parameters of system are: aperture area of collector array is 27 m2, tilted angle of collector with respect to the horizontal plane is 20 toward to south evaporator temperature is 5 °C and the Cooling capacity is 20 kW. The simulation is based on the meteorological data of monthly typical day which was summarized from a year round measured data. A corresponding parametric model was developed. The hourly and average performance with the collector temperature for monthly typical day was obtained and discussed. It was found that the suitable working range of inlet temperature of collector is 110–130 °C to improve performance and lower the risk of crystallization. The difference of hourly total efficiency in 9:00–16:00 is less, and the monthly total efficiency from May to October is approximate. The yearly performance of system including total efficiency, Cooling capacity per area of collector and solar fraction was given. Furthermore, the effect of effectiveness of heat exchanger and pressure drop on total efficiency and solar fraction was studied and compared. The paper can serve as a preliminary investigation of solar air cooled double effect LiBr/H2O Absorption Cooling system in subtropical city, and provides the foundation of further study.

Paul Henshaw – One of the best experts on this subject based on the ideXlab platform.

  • residential solar air conditioning energy and exergy analyses of an ammonia water Absorption Cooling system
    Applied Thermal Engineering, 2014
    Co-Authors: Julia Aman, David S K Ting, Paul Henshaw

    Abstract:

    Large scale heat-driven Absorption Cooling systems are available in the marketplace for industrial applications but the concept of a solar driven Absorption chiller for air-conditioning applications is relatively new. Absorption chillers have a lower efficiency than compression refrigeration systems, when used for small scale applications and this restrains the Absorption Cooling system from air conditioning applications in residential buildings. The potential of a solar driven ammoniaewater Absorption chiller for residential air conditioning application is discussed and analyzed in this paper. A thermodynamic model has been developed based on a 10 kW air cooled ammoniaewater Absorption chiller driven by solar thermal energy. Both energy and exergy analyses have been conducted to evaluate the performance of this residential scale Cooling system. The analyses uncovered that the absorber is where the most exergy loss occurs (63%) followed by the generator (13%) and the condenser (11%). Furthermore, the exergy loss of the condenser and absorber greatly increase with temperature, the generator less so, and the exergy loss in the evaporator is the least sensitive to increasing temperature.

  • Residential solar air conditioning: Energy and exergy analyses of an ammonia–water Absorption Cooling system
    Applied Thermal Engineering, 2014
    Co-Authors: Julia Aman, David S K Ting, Paul Henshaw

    Abstract:

    Large scale heat-driven Absorption Cooling systems are available in the marketplace for industrial applications but the concept of a solar driven Absorption chiller for air-conditioning applications is relatively new. Absorption chillers have a lower efficiency than compression refrigeration systems, when used for small scale applications and this restrains the Absorption Cooling system from air conditioning applications in residential buildings. The potential of a solar driven ammoniaewater Absorption chiller for residential air conditioning application is discussed and analyzed in this paper. A thermodynamic model has been developed based on a 10 kW air cooled ammoniaewater Absorption chiller driven by solar thermal energy. Both energy and exergy analyses have been conducted to evaluate the performance of this residential scale Cooling system. The analyses uncovered that the absorber is where the most exergy loss occurs (63%) followed by the generator (13%) and the condenser (11%). Furthermore, the exergy loss of the condenser and absorber greatly increase with temperature, the generator less so, and the exergy loss in the evaporator is the least sensitive to increasing temperature.

Julia Aman – One of the best experts on this subject based on the ideXlab platform.

  • residential solar air conditioning energy and exergy analyses of an ammonia water Absorption Cooling system
    Applied Thermal Engineering, 2014
    Co-Authors: Julia Aman, David S K Ting, Paul Henshaw

    Abstract:

    Large scale heat-driven Absorption Cooling systems are available in the marketplace for industrial applications but the concept of a solar driven Absorption chiller for air-conditioning applications is relatively new. Absorption chillers have a lower efficiency than compression refrigeration systems, when used for small scale applications and this restrains the Absorption Cooling system from air conditioning applications in residential buildings. The potential of a solar driven ammoniaewater Absorption chiller for residential air conditioning application is discussed and analyzed in this paper. A thermodynamic model has been developed based on a 10 kW air cooled ammoniaewater Absorption chiller driven by solar thermal energy. Both energy and exergy analyses have been conducted to evaluate the performance of this residential scale Cooling system. The analyses uncovered that the absorber is where the most exergy loss occurs (63%) followed by the generator (13%) and the condenser (11%). Furthermore, the exergy loss of the condenser and absorber greatly increase with temperature, the generator less so, and the exergy loss in the evaporator is the least sensitive to increasing temperature.

  • Residential solar air conditioning: Energy and exergy analyses of an ammonia–water Absorption Cooling system
    Applied Thermal Engineering, 2014
    Co-Authors: Julia Aman, David S K Ting, Paul Henshaw

    Abstract:

    Large scale heat-driven Absorption Cooling systems are available in the marketplace for industrial applications but the concept of a solar driven Absorption chiller for air-conditioning applications is relatively new. Absorption chillers have a lower efficiency than compression refrigeration systems, when used for small scale applications and this restrains the Absorption Cooling system from air conditioning applications in residential buildings. The potential of a solar driven ammoniaewater Absorption chiller for residential air conditioning application is discussed and analyzed in this paper. A thermodynamic model has been developed based on a 10 kW air cooled ammoniaewater Absorption chiller driven by solar thermal energy. Both energy and exergy analyses have been conducted to evaluate the performance of this residential scale Cooling system. The analyses uncovered that the absorber is where the most exergy loss occurs (63%) followed by the generator (13%) and the condenser (11%). Furthermore, the exergy loss of the condenser and absorber greatly increase with temperature, the generator less so, and the exergy loss in the evaporator is the least sensitive to increasing temperature.