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A novel thermally driven pump and its test in a supercritical CO 2 loop system
Author(s) -
Yamaguchi Hiroshi,
Zhang XinRong,
Niu XiaoDong,
Hashitani Naoki
Publication year - 2013
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.2934
Subject(s) - supercritical fluid , heat pump , refrigerant , condenser (optics) , loop (graph theory) , materials science , thermal , coefficient of performance , nuclear engineering , thermodynamics , mechanical engineering , engineering , physics , heat exchanger , optics , mathematics , combinatorics , light source
SUMMARY In this paper, a novel thermally driven pump is introduced, and its test in a closed supercritical CO 2 loop cycle system is studied. The thermally driven pump is a refrigerant‐circulating pump composed of two expansion tanks, which has less electricity consumption and better reliability compared with conventional mechanical pumps. Experimental results showed that the system efficiency of the present thermally driven pump in the supercritical CO 2 loop can be enhanced compared with that using the mechanical feed pump. In addition, it was found that the system efficiency with the thermally driven pump decreases with the outlet temperature of condenser. The thermal energy utilization efficiency of the loop system with the thermally driven pump can be increased when the condenser has higher efficiency. Copyright © 2012 John Wiley & Sons, Ltd.