You need JavaScript to view this

Development of two-stage compression heat pump for hot water supply in commercial use. Establishment of design method for water and air heat source system; Gyomuyo nidan asshukushiki kyuto heat pump no kaihatsu. Suinetguen oyobi kuki netsugen sytem no sekkei hoho no kakuritsu

Abstract

The two-stage compression cascade heating heat pump cycle was devised for hot water supply in business use such as hotel and store use which allows hot water supply less in primary energy consumption than gas boilers, and higher in temperature than conventional heat pumps. This cycle heats water in cascade manner by two-stage compression using two compressors in both low- and high-stage refrigerant circuits, and two condensers different in condensation temperature (intermediate heat exchanger and condenser) to achieve higher hot water temperature and higher COP. For cost reduction, the new system design method was established which is possible to cope with conventional compressors such as screw and scroll ones with different theoretical suction volume for every one. System design parameters such as thermal output and COP of hot water supply were largely affected by theoretical suction volume ratio of low- and high-stage compressors dependent on combination of the compressors, and refrigerant condensing temperature in an intermediate heat exchanger as proper parameter. 4 refs., 17 figs., 13 tabs.
Authors:
Hasegawa, H; Hashimoto, K; Saikawa, M; Iwatsubo, T; Mimaki, T [1] 
  1. Central Research Institute of Electric Power Industry, Tokyo (Japan)
Publication Date:
Jul 01, 1996
Product Type:
Technical Report
Report Number:
CRIE-W-95015
Reference Number:
SCA: 320106; 320303; PA: NEDO-97:950012; EDB-97:066772; NTS-97:011297; SN: 97001783761
Resource Relation:
Other Information: PBD: Jul 1996
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; COMMERCIAL BUILDINGS; WATER HEATING; WASTE HEAT UTILIZATION; HEAT PUMPS; AIR SOURCE HEAT PUMPS; WATER SOURCE HEAT PUMPS; ENERGY CONSERVATION; GAS UTILITIES; VAPOR CONDENSERS; COEFFICIENT OF PERFORMANCE; COMPRESSORS; STRATIFICATION; HEAT EXCHANGERS; TEMPERATURE DEPENDENCE
OSTI ID:
471294
Research Organizations:
Central Research Inst. of Electric Power Industry, Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE97744976; TRN: 97:950012
Availability:
Available from Central Research Institute of Electric Power Industry, 1-6-1, Otemachi, Chiyoda-ku, Tokyo, Japan; OSTI as DE97744976
Submitting Site:
NEDO
Size:
30 p.
Announcement Date:

Citation Formats

Hasegawa, H, Hashimoto, K, Saikawa, M, Iwatsubo, T, and Mimaki, T. Development of two-stage compression heat pump for hot water supply in commercial use. Establishment of design method for water and air heat source system; Gyomuyo nidan asshukushiki kyuto heat pump no kaihatsu. Suinetguen oyobi kuki netsugen sytem no sekkei hoho no kakuritsu. Japan: N. p., 1996. Web.
Hasegawa, H, Hashimoto, K, Saikawa, M, Iwatsubo, T, & Mimaki, T. Development of two-stage compression heat pump for hot water supply in commercial use. Establishment of design method for water and air heat source system; Gyomuyo nidan asshukushiki kyuto heat pump no kaihatsu. Suinetguen oyobi kuki netsugen sytem no sekkei hoho no kakuritsu. Japan.
Hasegawa, H, Hashimoto, K, Saikawa, M, Iwatsubo, T, and Mimaki, T. 1996. "Development of two-stage compression heat pump for hot water supply in commercial use. Establishment of design method for water and air heat source system; Gyomuyo nidan asshukushiki kyuto heat pump no kaihatsu. Suinetguen oyobi kuki netsugen sytem no sekkei hoho no kakuritsu." Japan.
@misc{etde_471294,
title = {Development of two-stage compression heat pump for hot water supply in commercial use. Establishment of design method for water and air heat source system; Gyomuyo nidan asshukushiki kyuto heat pump no kaihatsu. Suinetguen oyobi kuki netsugen sytem no sekkei hoho no kakuritsu}
author = {Hasegawa, H, Hashimoto, K, Saikawa, M, Iwatsubo, T, and Mimaki, T}
abstractNote = {The two-stage compression cascade heating heat pump cycle was devised for hot water supply in business use such as hotel and store use which allows hot water supply less in primary energy consumption than gas boilers, and higher in temperature than conventional heat pumps. This cycle heats water in cascade manner by two-stage compression using two compressors in both low- and high-stage refrigerant circuits, and two condensers different in condensation temperature (intermediate heat exchanger and condenser) to achieve higher hot water temperature and higher COP. For cost reduction, the new system design method was established which is possible to cope with conventional compressors such as screw and scroll ones with different theoretical suction volume for every one. System design parameters such as thermal output and COP of hot water supply were largely affected by theoretical suction volume ratio of low- and high-stage compressors dependent on combination of the compressors, and refrigerant condensing temperature in an intermediate heat exchanger as proper parameter. 4 refs., 17 figs., 13 tabs.}
place = {Japan}
year = {1996}
month = {Jul}
}