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Residential Hybrid-Ground Source Heat Pump -- Phase I 住宅混合式地源热泵一期工程
地源热泵(GSHP)是一种集中供暖和制冷系统,在制冷模式下将热量传输到地面,并在供暖模式下将热量从地面排出。这项技术背后的概念是利用地下深处近似恒定的温度,使蒸汽压缩系统能够更有效地工作。由于系统全年运行,由于地面需要一些时间将热量散发到离地面热交换器最远的地面,因此地面温度会因热传递而发生变化。因此,地源热泵系统效率随着冬夏两季的提前而降低。为了避免冬季散热和夏季增热对地温的负面影响,混合动力车- 地源热泵系统被视为一种选择。例如,在商业系统中,使用冷却塔可以减少添加到地面的热量,因此地面温度不会像不使用冷却塔时那样升高。然而,对于房屋来说,使用冷却塔是不合理的。从这个意义上讲,位于德克萨斯州泰勒市的一家研究机构正在开发的混合地源热泵项目,将调查使用水-空气热交换器作为辅助热交换器的系统的经济和技术可行性。总体思路是,两个并联的热交换器可以使用,具体取决于其中一个在加热模式下运行时提供较高的进水温度,或者在冷却模式下运行时提供较低的进水温度。 该项目计划分三个阶段开发,以便每个阶段都有一年的数据。在本文介绍的第一阶段,该系统将仅与地下换热器一起运行。在第二阶段,系统将与两个热交换器一起运行,而无需选择或再生地面。最后,在第三阶段,该系统将与两台热交换器并联运行,但同时,当系统无法满足住宅对热能的需求时,将使用空气-水热交换器对地面进行再生。本文介绍了研究设施、混合动力的概念- 地源热泵将分三个阶段开发,系统的能源性能将在第一阶段收集数据。引用:2017年年度会议,加利福尼亚州长滩,会议论文
A ground source heat pump (GSHP) is a central heating and cooling system that transfers heat to the ground during cooling mode and removes heat from the ground during heating mode. The concept behind this technology is the use the approximately constant temperature of the deep ground to make possible a vapor compression system to work more efficiently. As the system operates along the year, the ground temperature changes due to the heat transferred because the ground needs some time to dissipate the heat to ground farthest from the ground heat exchanger. So, the GSHP system efficiency decreases with the advance of winter and summer. To avoid the negative impact on the ground temperature from removing heat during winter and adding heat during summer, hybrid-GSHP systems are considered as an option. For example, in commercial systems, the use of a cooling tower reduces the amount of heat added to the ground and consequently the temperature of the ground does not rise as much as without the use of the cooling tower. However, for houses the use of a cooling tower is not justified. In this sense, the hybrid-GSHP project being developed in a research house located in Tyler TX, will be investigating the economic and technical feasibility of a system using a water-to-air heat exchanger as an ancillary heat exchanger. The overall idea is that the two heat exchangers, connected in parallel, can be used depending in which one offers the higher entering water temperature during operation in heating mode or the lower entering water temperature during operation in cooling mode. The project has been planned to be developed in three phases, in order to have one year data for each phase. In Phase I, which is presented in this paper, the system will be operating only with the ground heat exchanger. In Phase II the system will operate with the two heat exchangers without the option or regeneration of the ground. Finally, in Phase III the system will operate with the two heat exchangers in parallel but at the same time, the air-to-water heat exchanger will be used to regenerate the ground when the system is not working to satisfy the house demand for thermal energy. This paper describes the research facility, the concept of the hybrid-GSHP to be developed in three phases, and energy performance of the system in Phase I for the data being collected.
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