Coupled seepage and heat transfer intake model
Tóm tắt
In the beach well intake system, heat is transferred from soil to fluid when seawater is filtered through the aquifer, providing higher temperature source water to the seawater source heat pump (SWHP) system in winter. A 3-D coupled seepage and heat transfer model for studying beach well intake system is established by adopting the computer code FLUENT. Numerical results of this model are compared with the experimental results under the same conditions. Based on the experiment-verified coupled model, numerical simulation of the supply water temperature is studied over a heating season. Results show that the minimum temperature of supply water is 275.2 K when this intake system continuously provides seawater with flow rate of 35 m3/h to SWHP. Results also indicate that the supply water temperature is higher than seawater, and that the minimum temperature of supply water lags behind seawater, ensuring effective and reliable operation of SWHP.
Tài liệu tham khảo
Li Z, Duan M L, Shu H W et al. District cooling and heating with seawater as heat source and sink in Dalian [J]. Renewable Energy, 2006, 32(15): 2603–2616.
Zhang Li, Hu Songtao. Research on the heat pump system using seawater as heat source or sink [J]. Building Energy and Environment, 2006, 25(3): 34–38 (in Chinese).
Satoru Okamoto. A heat pump system with a latent heat storage utilizing seawater installed in an aquarium [J]. Energy and Buildings, 2006, 38(2): 121–128.
Jiang Shuang, Li Zhen, Duan Mulin et al. Applications and trends of seawater heat pump [J]. Energy Conservation and Environmental Protection, 2005(10): 11–14(in Chinese).
Friotherm A G, Värtan Ropsten. The Largest Seawater Heat Pump Facility Worldwide, with 6 Unitop 50FY and 180 MW Total Capacities [EB/OL]. http://www.friotherm.com/downloads/vaertan_e008_uk.pdf, 2009, 4.
Nikolay Voutchkov. SWRO desalination process: On the beach-seawater intakes [J]. Filtration and Separation, 2005, 42(8): 24–27.
Jones A T, Campbell R L. Seawater desalination: A generalized model for feedwater intakes [C]. In: Proceedings of MTS/IEEE OCEANS 2005. Washington DC, USA, 2005.
Bou-Hamad S, Abdel-Jawad M, Ebrahim S et al. Performance evaluation of three different pretreatment systems for seawater reverse osmosis technique [J]. Desalination, 1997, 110(1/2): 85–92.
Hassan A M, Jamaluddin A T M, Rowaili A et al. Investigating intake system effectiveness with emphasis on a self-jetting well-point (SJWP) beachwell system [J]. Desalination, 1999, 123(2/3): 195–204.
El-Zanati Elham, Eissa Sherif. Development of a locally designed and manufactured small-scale reverse osmosis desalination system [J]. Desalination, 2004, 165: 133–139.
Norio Tenma, Kasumi Yasukawa, George Zyvoloski. Model study of the thermal storage system by FEHM code [J]. Geothermics, 2003, 32(4/5/6): 603–607.
Richard B Winston. HST3D GUI [EB/OL]. http://www.mindspring.com/~rbwinston/hst3dgui/HST3D_GUI.htm, 1998.
Zhang Yuandong, Wei Jiahua, Li Yu et al. Simulation of changes in geo-temperature field due to energy abstraction from underground aquifers [J]. Journal of Tianjin University, 2006, 39(8): 907–912 (in Chinese).
Trefry Mike G, Muffels Chris. FEFLOW: A finiteelement ground water flow and transport modeling tool [J]. Ground Water, 2007, 45(5): 525–528.
Zhu Xueyu, Xie Chunhong. Transport Model of Groundwater [M]. China Architecture and Building Press, Beijing, 1990(in Chinese).
Li Sufen, Wang Jinxiang, Ge Yulin et al. Numerical simulation of U-tube underground heat exchanger under coupled thermal conduction and groundwater seepage conditions [J]. Journal of Thermal Science and Technology, 2006, 5(4): 301–305 (in Chinese).
Fluent Inc. FLUENT User’s Guide, Release 6.2.16 [M]. 2005.
Wu Junhua, You Shijun, Li Haishan. Experiment on intake technology of seawater source heat pump system [J]. Journal of Tianjin University, 2009, 42(1): 78–82 (in Chinese).