Experimental Results of a Gas Fired Adsorption Heat Pump and Simulative Prediction of Annual Performance in a Multi-Family House
Velte, Andreas 1Laurenz, Eric 1Leisner, Simon 1Weber, Josef 1Wittstadt, Ursula 2Fueldner, Gerrit1
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作者信息
1. Fraunhofer Inst Solare Energiesyst ISE
2. Fahrenheit GmbH
折叠
Abstract
Gas driven sorption heat pumps can be an efficient alternative to conventional gas condensing boilers for heating buildings. Measurement results of a functional prototype of a gas adsorption heat pump with 40 kW nominal capacity and the SAPO-34-water working pair are presented. The innovative adsorption heat exchanger is directly crystallized applying the partial support transformation technique. A transient lumped-parameter model of the gas adsorption heat pump is developed. For the first time, it is possible to perform an annual simulation of the GAHP within the heating system of a multi-family house with full adsorption dynamics based on calibrated and validated component models. This annual performance calculation is carried out for the two different low-temperature heat sources geothermal heat (bore hole heat exchanger) and exhaust air. Using exhaust air as low-temperature heat source for a GAHP is an entirely new approach that is evaluated in this study. Compared to a gas condensing boiler, the annual gas consumption is reduced by 22 % for the case of bore hole heat exchanger and by 27 % for the case of exhaust air as low-temperature heat source for a building with heating circuit design temperatures of 45 degrees C/35 degrees C.
Key words
Gas adsorption heat pump/SAPO-34-water/Exhaust air/Transient annual simulation
NSTL
Elsevier