Abstract
From the viewpoints of environmental conservation and energy efficiency, seawater-source heat pump system (SWHP) to provide district cooling and heating is applied in coastal areas. Based on the system, a heat transfer model was established for cast heat exchanger (CHE) adopted by SWHP systems. The CHE consists of pipes immersed in the seawater and used for transferring heat between the seawater and the heat exchanger pipes of SWHP system. An experimental study was carried out to test the validity of the model. A program was developed in VB language and the effects of inlet temperature, flow rate of the secondary refrigerant and length of CHE on the results were investigated. The results of the numerical simulation are in consistence with the experiments in both winter and summer conditions. As a result, application of SWHP systems with CHE in coastal areas in China is feasible due to the favorable geographical conditions and environment.
Similar content being viewed by others
References
SONG Y, YASUNORI A. Effects of utilizing seawater as a cooling source system in a commercial complex [J]. Energy and Buildings, 2006, 39: 1080–1087.
WU Rong-hua, ZHANG Cheng-hu. Energy-saving and environ-mental evaluation of surface-water source heat-pump system [J]. Journal of Harbin Institute of Technology, 2008, 40: 226–229. (in Chinese)
CHEN Xiao, ZHANG Guo-qiang, PENG Jian-guo. The performance of an open-loop lake water heat pump system in south China [J]. Applied Thermal Engineering, 2006, 26: 2255–2261.
YANG H, CUI P, FANG Z. Vertical-borehole ground-coupled heat pumps: A review of models and systems [J]. Applied Energy, 2009, 87: 16–27.
Värtan Ropsten—the largest seawater heat pump facility worldwide, with 6 Unitop® 50FY and 180MW total capacity [EB/OL]. [2008]. http://www.friotherm.com/downloads/vaertan_e008_uk.pdf.
SATORU O. A heat pump system with a latent heat storage utilizing seawater installed in an aquarium [J]. Energy and Buildings, 2005, 38: 121–128.
YU Yan-shun, MA Zui-liang, LI Xian-ting. A new integrated system with cooling storage in soil and ground-coupled heat pump ground source heat pump description and preliminary results of the eco house system [J]. Applied Thermal Engineering, 2007, 28: 1450–1462.
LI Zhen, LIN D, SHU H. District cooling and heating with seawater as heat source and sink in Dalian, China [J]. Renewable Energy, 2007, 32: 2603–2616.
AITTOMÄKI A. Lakes as a heat source in cold climate [C]// Proceedings of 21st IIR International Congress of Refrigeration. Washington, 2003: 88–92.
BÜYÜKALACA O, EKINCI F, YILMAZ T. Experimental investigation of Seyhan River and dam lake as heat source-sink for a heat pump [J]. Energy, 2003, 28: 157–169.
TIM P, JOYCE W. Lake-source cooling [J]. ASHRAE Journal, 2002, 44: 37–39.
KAVANAUGH S, RAFFERTY K. Ground-source heat pump: Design of geothermal systems for commercial and institutional buildings [M]. Atlanta: ASHRAE Inc, 1997: 145–197.
PARSONS R. ASHRAE handbook-heating, ventilating, and air-conditioning systems and applications [M]. Atlanta: ASHRAE Inc, 1987: 249–288.
PARSONS R. ASHRAE handbook-systems [M]. Atlanta: ASHRAE Inc, 1980.
TAO Wen-shuan. Numerical heat transfer [M]. 2nd Edition. Xi’an: Xi’an Jiaotong University Press, 2001: 1–47. (in Chinese)
Author information
Authors and Affiliations
Corresponding author
Additional information
Foundation item: Project(2006BAJ04A15-03) supported by the National Science and Technology Pillar Program during the Eleventh Five-year Plan Period
Rights and permissions
About this article
Cite this article
Yu, J., Dong, L., Zhang, H. et al. Heat transfer analysis and experimental verification of cast heat exchanger. J. Cent. South Univ. Technol. 19, 1610–1614 (2012). https://doi.org/10.1007/s11771-012-1183-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11771-012-1183-2