Development and experimental validation of a high-temperature heat pump for heat recovery and building heating

被引：14

作者：

Wang Kai ^{[1
]}

Cao Feng ^{[1
]}

Xing Ziwen ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Energy & Power Engn, Xian 710049, Peoples R China

来源：

ENERGY AND BUILDINGS | 2009年 / 41卷 / 07期

关键词：

High-temperature heat pump; Geothermal water; Heat recovery; Building heating; Oil cooling; Cooled oil temperature;

D O I：

10.1016/j.enbuild.2009.02.004

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The performance of a high-temperature heat pump unit using geothermal water for heat recovery in buildings is experimentally evaluated. The unit consists of a twin-screw refrigeration compressor, a condenser, an evaporator and an oil cooling system. The effect of the cooled oil temperature on the performance of the heat pump unit is experimentally investigated. Results show that the unit stably produces outlet hot water at a constant temperature of 85 degrees C and performs well in a wide range of high-temperature conditions with a high energy efficiency ratio. The results also indicate that the key to improving the performance of a high-temperature heat pump unit often depend on the selection of proper cooled oil temperature. The optimum cooled oil temperature is 50-65 degrees C when the condensing temperature is above 70 degrees C. At these temperatures, the oil cooling system can increase the energy efficiency ratio of the heat pump by 6.3%. (c) 2009 Elsevier B.V. All rights reserved.

引用

页码：732 / 737

页数：6

共 8 条

[1] Economy of exploiting heat from low-temperature geothermal sources using a heat pump [J].

Kulcar, B. ;

Goricanec, D. ;

Krope, J. .

ENERGY AND BUILDINGS, 2008, 40 (03) :323-329

[2] High temperature hot water heat pump with non-azeotropic refrigerant mixture HCFC-22/HCFC-141b [J].

Li, TX ;

Guo, KH ;

Wang, RZ .

ENERGY CONVERSION AND MANAGEMENT, 2002, 43 (15) :2033-2040

[3]

LIEBENBERG L, 1998, ASHRAE T, V104, P418

[4] Moderately high temperature water source heat-pumps using a near-azeotropic refrigerant mixture [J].

Liu, NX ;

Lin, S ;

Han, LZ ;

Zhu, MS .

APPLIED ENERGY, 2005, 80 (04) :435-447

[5] CONSIDERATION OF THE PERFORMANCE OF A VAPOR-COMPRESSION HEAT-PUMP CYCLE USING NONAZEOTROPIC REFRIGERANT MIXTURES [J].

MIYARA, A ;

KOYAMA, S ;

FUJII, T .

INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 1992, 15 (01) :35-40

[6]

NAKATANI K, 1989, NATL TECH REP, V35, P12

[7] INVESTIGATION OF THE INFLUENCE OF OIL INJECTION UPON THE SCREW COMPRESSOR WORKING PROCESS [J].

STOSIC, N ;

MILUTINOVIC, L ;

HANJALIC, K ;

KOVACEVIC, A .

INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 1992, 15 (04) :206-220

[8] Experimental evaluation of a non-azeotropic working fluid for geothermal heat pump system [J].

Zhao, L .

ENERGY CONVERSION AND MANAGEMENT, 2004, 45 (9-10) :1369-1378

← 1 →