The Influence of Several Major Irreversibilities on the Performance Characteristics of an n-Stage Combined Heat Pump System

Jincan CHEN; Bihong LİN; Chih WU

Makale detayları

The Influence of Several Major Irreversibilities on the Performance Characteristics of an n-Stage Combined Heat Pump System

Yazarlar:

Jincan CHEN | Bihong LİN | Chih WU

Yayıncı:

Uluslararası Uygulamalı Termodinamik Derneği İktisadi İşletmesi

Dergi:

International Journal of Thermodynamics 1999 Vol.2 Issue 4, pp.187-195

Belge Tipi:

Makale

Yayın Tarihi:

11/1999

Belge Dili:

İngilizce

Document ID (Org No.):

2000477389

Sıklık:

Üç Aylık

eISSN:

2146-1511

pISSN:

1301-9724

Özet:

 

A universal cycle model of an n-stage combined heat pump system, which includes the irreversibility of finite-rate heat transfer across finite temperature differences, the heat leak loss between the external heat reservoirs, and the irreversibilities inside the working fluid, is established and used to investigate the influence of these irreversibilities on the performance of the system. The coefficient of performance is taken as an objective function for optimization. A general optimum relation is derived for a given specific heating load and a given total heat-transfer area of heat exchangers. The general performance characteristic curves of the system are obtained. The maximum coefficient of performance with non-zero specific heating load is determined. Some key design variables, such as the specific heating load, the temperature ratios of the working fluid in the isothermal processes, the distribution of the heat-transfer areas of heat exchangers, and the total power input of the system, are optimized. The optimal performance of an arbitrary-stage irreversible, endoreversible, and reversible combined heat pump system can be directly derived from the results in this paper.

Makale detayları

The Influence of Several Major Irreversibilities on the Performance Characteristics of an n-Stage Combined Heat Pump System

Yazarlar: Jincan CHEN | Bihong LİN | Chih WU

Yayıncı: Uluslararası Uygulamalı Termodinamik Derneği İktisadi İşletmesi

Dergi: International Journal of Thermodynamics 1999 Vol.2 Issue 4, pp.187-195

Belge Tipi: Makale

Yayın Tarihi: 11/1999

Belge Dili: İngilizce

Document ID (Org No.): 2000477389

Sıklık: Üç Aylık

eISSN: 2146-1511

pISSN: 1301-9724

Sayı

Yazarlar:

Jincan CHEN | Bihong LİN | Chih WU

Yayıncı:

Uluslararası Uygulamalı Termodinamik Derneği İktisadi İşletmesi

Dergi:

International Journal of Thermodynamics 1999 Vol.2 Issue 4, pp.187-195

Belge Tipi:

Makale

Yayın Tarihi:

11/1999

Belge Dili:

İngilizce

Document ID (Org No.):

2000477389

Sıklık:

Üç Aylık

eISSN:

2146-1511

pISSN:

1301-9724