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Performance analyses of absorption heat pumps using conventional working fluids and alternatives.

Author(s) : HERA D., VASILESCU C.

Summary

Absorption heat pumps have attracted research interests because they can be driven by waste heat, solar or geothermal energy and they can reduce fossil fuel and electricity consumption with advantageous implications for pollution reduction, by decreasing CO2 emissions. The working fluids of these systems are very important because their properties have a great effect on the performance of the cycles and on the minimal allowable values of the driving agent temperatures, especially when the application of waste heat or renewable energy is requested. In this paper, a single-stage absorption heat pump with the ground water as a sink is studied in order to provide heating for a residential building. A model based on the heat and mass balance equations for each component of the absorption heat pump has been used to study the effect of operating temperatures on the performance of the system. Using the developed model the temperature, pressure, concentration and enthalpy for each point of state are predicted. The heat flux required to drive the generator, the thermal power for the evaporator as well as the heat flux rejected from condenser and absorber are determined. The performance of the system is evaluated by the coefficient of performance. The minimum temperature of the driving agent is predicted and the applications possibilities are also discussed.

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Pages: 781-788

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Details

  • Original title: Performance analyses of absorption heat pumps using conventional working fluids and alternatives.
  • Record ID : 30001280
  • Languages: English
  • Source: Sources/sinks Alternative to the Outside Air for Heat Pump and Air-conditioning Techniques (Alternative Sources - AS), Padua, Italy, April 5-7, 2011. / International Sorption Heat Pump Conference (ISHPC11), Padua, Italy, April 6-8, 2011.
  • Publication date: 2011/04/06

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