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首页> 外文会议>ISES biennial solar world congress >Energy Efficient Integration of Heat Pumps into Solar District Heating Systems with Seasonal Thermal Energy Storage
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Energy Efficient Integration of Heat Pumps into Solar District Heating Systems with Seasonal Thermal Energy Storage

机译：通过季节性热能存储将热泵高效集成到太阳能区域供热系统中

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Solar district heating (SDH) with seasonal thermal energy storage (STES) is a technology to provide heat for space heating and domestic hot water preparation with a high fraction of renewable energy. In order to improve the efficiency of such systems heat pumps can be integrated. By preliminary studies it was discovered, that the integration of a heat pump does not always lead to improvements from an overall energy perspective, although the operation of the heat pump increases the efficiency of other components of the system e. g. the STES or the solar collectors. Thus the integration of heat pumps in SDH systems was investigated in detail. Usually, the heat pumps are integrated in such a way, that the STES is used as low temperature heat source. No other heat sources from the ambience are used and only that amount of energy consumed by the heat pump is additionally fed into the system. In the case of an electric driven heat pump, this is highly questionable concerning economic and CO_2-emission aspects. Despite that fact the operation of the heat pump influences positively the performance of other components in the system e. g. the STES and makes them more efficient. If the primary energy consumption of the heat pump is lower than the energetic benefits of all other components, the integration makes sense from an energetic point of view. A detailed assessment has been carried out to evaluate the most promising system configurations for the integration of a heat pump. Based on this approach a system concept was developed in which the integration of the heat pump is energetically further improved compared to realised systems. By means of transient system simulations this concept was optimised with regard to the primary energy consumption. A parameter study of this new concept has been performed to identify the most sensitive parameters of the system. The main result and conclusion are that higher solar fractions and also higher primary energy savings can be achieved by SDH systems using heat pumps compared systems without heat pumps.
机译：具有季节性热能存储（STES）的太阳能区域供热（SDH）是一项技术，可通过大量可再生能源为空间供热和生活热水制备提供热量。为了提高这种系统的效率，可以集成热泵。通过初步研究发现，尽管热泵的运行提高了系统其他部件的效率，但从整体能源角度来看，热泵的集成并不一定总能带来改进。 G。 STES或太阳能收集器。因此，详细研究了SDH系统中热泵的集成。通常，热泵以这样的方式集成在一起，即STES用作低温热源。没有使用来自环境的其他热源，只有热泵消耗的那部分能量被额外地馈送到系统中。在电动热泵的情况下，这在经济和CO 2排放方面是非常可疑的。尽管如此，热泵的运行仍对系统e中其他组件的性能产生积极影响。 G。 STES并提高其效率。如果热泵的一次能源消耗低于所有其他组件的能源优势，那么从能源的角度来看，这种集成是有意义的。已经进行了详细的评估，以评估用于集成热泵的最有希望的系统配置。基于这种方法，开发了一种系统概念，与已实现的系统相比，该系统极大地提高了热泵的集成度。通过暂态系统仿真，该概念针对一次能源消耗进行了优化。已经对该新概念进行了参数研究，以识别系统中最敏感的参数。主要结果和结论是，与没有热泵的系统相比，使用热泵的SDH系统可以实现更高的太阳能百分率和更高的一次能源节省。

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