多源热泵（MSHP）系统旨在通过组合或交替使用两个或多个热源来实现更高的系统效率。在这项研究中，一个MSHP系统，位于密歇根州的房子设计，描述。水-水热泵系统与太阳能集热器、垂直钻孔和水平地下环路相结合，埋藏在建筑物基础下的部分绝缘的受限地下区域中。供暖通过地板辐射系统提供，冷风通过空气处理器提供给每个空调空间，使用热泵作为主要冷却源。在供暖季节，收集的太阳能热将首先满足家用热水（DHW）和地板辐射系统（用于自由空间供暖）的供暖要求。 如果剩余的太阳热量过多，将被转移到与地下环路相连的地热缓冲储槽中，以便在地下环路周围和下方的地下区域长期或季节性地储存热能。当地板辐射系统需要加热时，热泵将从地热缓冲储槽或垂直钻孔（以能提供较高出水温度的为准）的热源侧提取热量。如果地热缓冲罐的温度低于设定值，则水平地下回路（称为热电池）将用于为地热缓冲罐充电。这使得冬季空间供暖的系统效率最大化，这对这种供暖更为关键- 位于密歇根州等寒冷气候地区的主要建筑。通过一系列模拟对该系统进行了数值模拟，结果表明，在不使用水平地下回路作为蓄热元件的情况下，将该系统与传统地源热泵（GSHP）系统进行比较，热泵供暖可以实现20%以上的节能。结果还证明了采用这种MSHP系统实现更多节能的可行性，以及优化控制策略的重要性。例如，本研究表明，在研究两种控制策略时，在热能使用方面的差异超过10%，即全年通过水平环路向地下区域充电或仅在夏季充电。 引用:佛罗里达州奥兰多2020年冬季会议论文

Multi-Source Heat Pump (MSHP) systems are intended to achieve a higher system efficiency through the combined or alternate use of two or more sources for a heat pump. In this study, an MSHP system, designed for a house located in Michigan, is described. A water-to-water heat pump system is integrated with solar thermal collectors, vertical boreholes, and horizontal underground loops buried in a partially-insulated, confined underground region beneath the building foundation. Heating is provided through a floor radiant system, and cool air is supplied to each conditioned space through air handlers using the heat pump as the primary cooling source. Solar heat collected will first satisfy the heating requirements of the Domestic Hot Water (DHW) and floor radiant systems (for free space heating) in heating seasons. Excessive solar heat, if left over, will then be transferred into a geothermal buffer storage tank that is connected with the underground loop to allow for long-term or seasonal thermal energy storage in the underground regions of earth around and below the underground loops. When heating is needed by the floor radiant system, the heat pump will extract heat at its source side from either the geothermal buffer storage tank or the vertical boreholes, whichever can give a higher outlet water temperature. The horizontal underground loops, known as Thermal Battery, will be used to charge the geothermal buffer tank if the temperature of the tank is lower than a set point. This enables to maximize the system efficiency for space heating in winter, which is more critical for this heating-dominated building located in a cold climate region such as Michigan. This proposed system was modeled numerically with a series of simulations, whose results show that more than 20% energy savings can be achieved for the heat pump heating when comparing the proposed system and a conventional Ground Source Heat Pump (GSHP) system without using the horizontal underground loops as a heat storage element. The results also demonstrate the feasibility of using this type of MSHP system to achieve more energy savings as well as the importance of optimizing the control strategy. For example, this study indicates that a more than 10% difference in terms of heating energy usage is identified when looking at two control strategies, i.e., charging the underground region through the horizontal loops during the whole year or only charging it during summer.