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The research work performed within the frame of this contract consisted of several phases, the predesign and choice of cycle, the design of complete absorption cycle, construction of components, assembly of the test plant in the laboratory, the start-up of the test plant, the measurement campaign, technical improvements, and a final evaluation and analysis of data collected during the whole time. The heat pump transformer cycle that was chosen is a three stage absorption cycle with two independent working fluid cycles and three solution cycles. The output capacity of the test plant was approximately 60 kW. The estimated coefficient of performance, defined as the ratio of heat available for the user versus the heat consumption of the heat pump transformer, is 4.2. This value was also obtained experimentally. The evaluation of the experiments showed also that the newly designed absorbers exhibit good heat transfer coefficients. The transient behaviour of the test plant was also studied in order to obtain the time constants for the reaction of the heat pump transformer upon a sudden change.

Additional information

Authors: ALEFELD G, Technische Universität München, Physik Department (DE);SCHARFE J, Technische Universität München, Physik Department (DE)
Bibliographic Reference: EUR 14371 DE (1993) 57 pp., MF, ECU 4, blow-up copy ECU 10
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