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首页> 外文期刊>Energy Conversion & Management >A dynamic analysis of a SAGSHP system coupled to solar thermal collectors and photovoltaic-thermal panels under different climate conditions
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A dynamic analysis of a SAGSHP system coupled to solar thermal collectors and photovoltaic-thermal panels under different climate conditions

机译：不同气候条件下太阳能热收集器和光伏 - 热板的SAGSHP系统的动态分析

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The use of multi-source energy systems is a promising technical solution for the reduction of greenhouse gases emissions and, at the meantime, for enhancing the exploitation of renewable energy sources.The present paper analyses a Solar Assisted Ground Source Heat Pump system and tries to fill the gap in the literature, where a direct comparison between the consolidated solar thermal technology and the emerging and widely discussed photovoltaic thermal technology is missing. Indeed, the two different devices for the exploitation of solar energy have been analysed through dynamic simulations carried out in TRNSYS environment. Through this approach, it is possible to investigate and predict in detail the thermal and electrical behaviour of the energy system, composed by a water-to-water heat pump, which withdraws from two thermal reservoirs that are connected to a solar loop, composed either of solar thermal collectors or of photovoltaic thermal panels and to a ground loop.The heat pump is used to provide space cooling and space heating to a residential building, through fan coil terminal units or radiant floor system. Furthermore, the heat pump system assists the solar field in the production of domestic hot water.This study looks at the development of a flexible system able to work in different operating conditions. The model's boundary conditions can be changed for simulating a variety of case studies as the weather condition, the building load and the domestic hot water profile can be easily changed, together with specific components' parameters. The control strategy makes it possible to vary the setpoint temperatures for simulating different operating conditions and management choices. In this way, the user can easily adapt the model functions to a specific plant system.The operating conditions of the two systems layouts have been compared and the energy performances evaluated for three case studies characterised by the weather conditions of the European cities of Berlin (mild-cold climate), Venice (mild climate) and Barcelona (mild-warm climate), and the corresponding thermal load profile of a two-storey building with a useful floor area of 170 m(2).The study shows the possibility to directly exploit the solar energy for the domestic hot water production and as a heat source for the heat pump. The results from the comparison between the two systems' configurations, with photovoltaic thermal panels and with solar thermal collectors, prove that there is the possibility to obtain a relevant improvement in the efficiency of the heat pump using photovoltaic thermal panels. The investigated multi-source energy system, moreover, allows an optimal employment of the available renewable heat sources and could easily be applied to case studies characterized by different boundary conditions.
机译：多源能源系统的使用是一个有前途的技术解决方案，可用于减少温室气体排放，同时增强可再生能源的开发。本文分析了太阳能辅助地源热泵系统，并试图填补文献中的差距，在那里缺少综合太阳能热技术与新兴和广泛讨论的光伏热技术之间的直接比较。实际上，通过TRNSYS环境中进行的动态模拟，已经分析了用于开发太阳能的两个不同的设备。通过这种方法，可以详细地研究和预测由水 - 水热泵组成的能量系统的热和电能，该热泵从连接到太阳循环的两个热储存器中取出，可以太阳能热收集器或光伏热面板和地面回路。热泵用于通过风扇线圈端子单元或辐射地板系统为住宅建筑提供空间冷却和空间加热。此外，热泵系统有助于太阳能领域在国内热水的生产中。本研究旨在开发一种能够在不同的操作条件下工作的柔性系统。模型的边界条件可以改变为模拟各种案例研究作为天气状况，建筑物负荷和国内热水型材可以很容易地改变，以及特定的组件参数。控制策略使得可以改变设定点温度，以模拟不同的操作条件和管理选择。通过这种方式，用户可以轻松地使模型功能适应特定的植物系统。已经比较了两个系统布局的操作条件，并评估了三种案例研究，其特征在于柏林欧洲城市的天气状况（温和的气候），威尼斯（温和气候）和巴塞罗那（温和温暖的气候），以及一个双层建筑的相应热负荷曲线，有用的建筑面积为170米（2）。该研究表明了可能性直接利用太阳能为国内热水生产，作为热泵的热源。两种系统配置之间的结果，具有光伏热面板和太阳能热量集电器的两个系统配置，证明了使用光伏热面板的热泵效率有可能获得相关的提高。此外，研究的多源能量系统允许最佳的可再生热源使用，并且可以很容易地应用于以不同的边界条件的特征的案例研究。

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