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Suitability of groundwater source heat pump variable flow operation mode for climate zone |
Wang Songqing1, Zhang Xu2, He Shijing1 |
1.College of Civil Engineering, Northeast Forestry University, Harbin, Heilongjiang 150040, China; 2.Mechanical Engineering College, Tongji University, Shanghai 200092, China |
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Abstract For operation safety point of view, the influence of ground water source heat pump(GWSHP)variable flow operation mode on characteristics of aquifer hydraulic parameters was investigated for the office buildings in the typical cities in different climate zones. The variation characteristics of porosity and permeability coefficient of borehole wall were identified by means of numerical simulation method under various operation modes of GWSHP pumping system; consequently the suitability of GWSHP operation mode for climate zone was analyzed. It was presented that the porosity of borehole wall was decreased by 45%, 48% and 44%, the permeability coefficient was reduced by 48%, 51% and 46%, respectively, in cold, severe cold, hot summer and cold winter zones under variable flow operation mode after running for five years compared with constant flow operation mode. After taking the effect of climate zone on characteristics of air conditioning load into account, the GWSHP variable operation mode is most suitable for severe cold zone, more suitable for cold zone, but less suitable for hot summer and cold winter zone.
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Received: 24 March 2013
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[1]Ni Long, Li Haorong, Jiang Yiqiang, et al. A model of groundwater seepage and heat transfer for single-well ground source heat pump systems[J]. Applied Thermal Engineering, 2011, 31(14/15):2622-2630.[2]Freedman V L, Waichler S R, Maxkley R D,et al. Assessing the thermal environmental impacts of an groundwater heat pump in southeastern Washington State[J]. Geothermics, 2012, 42(4):65-77.[3]Vittorio V, Giorgia B, Adriano S, et al. Impact of district heating and groundwater heat pump systems on the primary energy needs in urban areas[J]. Applied Thermal Engineering, 2012, 40(6):18-26.[4]胡继华,张延军,于子望, 等.水源热泵系统中地下水流贯通及其对温度场的影响[J]. 吉林大学学报:地球科学版, 2008, 38(6):992-998. Hu Jihua, Zhang Yanjun, Yu Ziwang, et al. Groundwater flow transfixion of groundwater source heat pump system and its influence on temperature filed[J]. Journal of Jilin University: Earth Science Edition, 2008, 38(6):992-998.(in Chinese)[5]刘雪玲,朱家玲,刘立伟.热泵耦合含水层储能技术研究[J].太阳能学报,2009,30(8):1023-1027. Liu Xueling, Zhu Jialing, Liu Liwei. Study on heat pump coupled aquifer thermal energy storage technology [J].Acta Energiae Solaris Sinica, 2009, 30(8):1023-1027.(in Chinese)[6]王松庆,张旭.地下水源热泵不同运行方式对含水层参数影响分析[J].湖南大学学报:自然科学版,2011,38(7):64-68. Wang Songqing, Zhang Xu. Influence on aquifer para-meters induced by groundwater source heat pump operation under different operation modes [J].Journal of Hunan University: Natural Science, 2011, 38(7): 64-68.(in Chinese)[7]王松庆,张旭.地下水源热泵定压差取水方式对含水层渗透性的影响[J].中南大学学报:自然科学版,2011,42(6):1624-1628. Wang Songqing, Zhang Xu. Influence of constant pressure difference on aquifer permeability induced by groundwater source heat pump pumping [J]. Journal of Central South University: Science and Technology, 2011, 42(6):1624-1628.(in Chinese)[8]Wang Songqing, Zhang Xu. Variation characteristics of aquifer parameters induced by groundwater source heat pump operation under variable flow[J]. Journal of Central South University of Technology, 2011, 18(4):1272-1277.[9]Stavropoulou M, Papanastasiou P, Vardoulakis I. Coupled wellbore erosion and stability analysis[J]. International Journal for Numerical and Analytical Methods in Geomechanics, 1998, 22(9):749-769.[10]Papamichos E, Vardoulakis I. Sand erosion with a porosity diffusion law[J]. Computers and Geotechnics, 2005, 32(1):47-58.[11]陆耀庆.实用供热空调设计手册[M].2版.北京:中国建筑工业出版社,2008: 2362-2375.[12]曲云霞,张林华,方肇洪,等.地下水源热泵及其设计方法[J].可再生能源,2002,106(6):11-14. Qu Yunxia, Zhang Linhua, Fang Zhaohong, et al. The study of ground-water heat pumps[J]. Renewable Energy, 2002, 106(6):11-14.(in Chinese)[13]张谋雄.冷水机组变流量的性能[J]. 暖通空调,2000,30(6):56-58. Zhang Mouxiong. Performance of chiller with variable chilled-water flow[J]. Journal of HV&AC, 2000,30(6): 56-58.(in Chinese)[14]李苏泷,邹娜.空调冷却水变流量控制方法研究[J]. 暖通空调,2005,35(12):51-54. Li Sulong, Zou Na. Control methods for variable condenser water flow in air conditioning systems[J]. Journal of HV&AC, 2005, 35(12):51-54.(in Chinese) |
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