为解决中深层地源热泵系统（GSHP）地温衰减的问题,以邯郸市某民用节能建筑为研究对象,基于TRNSYS建立一种PV/T耦合中深层地源热泵系统（PV/T-GSHP）,并与GSHP系统对比,模拟分析运行20 a PV/T-GSHP系统运行特性。探究PV/T组件的相关参数对土壤平均温度的影响。最后,将PV/T-GSHP系统与其他系统进行能耗对比。研究结果表明：与GSHP系统相比,PV/T-GSHP系统机组COP从6.44提高到6.81,但由于增加了泵功,系统COP降到2.38,但考虑发电量,平均每年可获得10015.831元收益;相似结构建筑PV/T组件屋顶铺设占比越大,集热泵流量越小,土壤平均温升越快;不考虑发电量时,PV/T-GSHP系统比燃气锅炉系统能耗高8.46%,与燃煤锅炉和电锅炉系统相比,分别可节约11.04%和48.55%的能耗;综合发电量时,20 a实际获得的发电量收益折合成燃煤量为210.05 t。
Abstract
A PV/T-coupled medium-deep GSHP system （PV/T-GSHP） was established based on TRNSYS to address the ground temperature attenuation issue in the medium-deep geothermal heat pump system （GSHP）. The research object was a civil energy-saving building in Handan City. The operating characteristics of the 20-year PV/T-GSHP system were simulated and analyzed, and the influence of relevant parameters of the PV/T components on the average soil temperature was investigated. The energy consumption of the PV/T-GSHP system was compared with other systems. According to the research, the PV/T-GSHP system's unit COP rose from 6.44 to 6.81 when compared to the GSHP system, but the system COP was reduced to 2.38 due to the increased pump power. However, considering the electricity generation, an average annual income of 10 015.83 yuan can be obtained. The proportion of PV/T components on the roof of similar structured buildings affects the heat pump flow rate and the average soil temperature rise. When not considering electricity generation, the energy consumption of the PV/T-GSHP system was 8.46% higher than that of the gas boiler system. Compared with the coal-fired boiler and electric boiler systems, the energy consumption can be reduced by 11.04% and 48.55%, respectively. Taking into account the electricity generation, the actual income from electricity generation in 20 years is equivalent to 210.05 tons of coal.
关键词
太阳能 /
热泵系统 /
供暖 /
性能系数 /
中深层地热 /
地温衰减
Key words
solar energy /
heat pump systems /
heating /
coefficient of performance /
medium-deep geothermal /
ground temperature attenuation
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基金
河北省自然科学基金（E2023402072）
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