Abstract
Renewable energy systems have received a lot of attention as sustainable technology in building sector. However, the efficiency of the renewable energy systems depends on the surrounding conditions, and it could gradually decrease by excessive and long-term operation. As a solution, a hybrid system can increase the reliability of energy production and decrease investment costs through by reducing the system capacity. The hybrid system operates at the ideal performance, but the design and operation method for hybrid system have not been established. In this paper, the performance of the hybrid system combined with photovoltaic/thermal (PVT) system and ground source heat pump (GSHP) system was analyzed using TRNSYS 17 and feasibility was assessed. The energy consumption and performance efficiency of hybrid system were calculated according to operating modes. Furthermore, seasonal performance factor (SPF) of hybrid system was compared with that of conventional GSHP system. System performance was analyzed in various conditions such as the usage of storage tank heating and set temperature for solar heating. As a result, the average SPF of the developed system increased about 55.3% compared with the GSHP system.
Highlights
Renewable energy system represent a sustainable and energy-saving technology in buildings
An unglazed PVT collector consists mainly of the heat-removal pipes located on the backside of the PV module, which reduce the temperature of the PV module
The performance of the Geo-PVT system was compared with the conventional ground source heat pump (GSHP) system
Summary
Renewable energy system represent a sustainable and energy-saving technology in buildings. In Korea, solar-energy systems such as photovoltaic (PV) have been regarded as the most popular among the renewable energy systems. A PVT system, which is devised to increase the efficiency of the PV system, extracts heat from the PV module through air or liquid, and it is classified according to the types of heating media and glass cover. An unglazed PVT collector consists mainly of the heat-removal pipes located on the backside of the PV module, which reduce the temperature of the PV module. An additional glass cover can increase the thermal performance of the collector though, it reduces slightly the optical and PV performances of the module [4,5]
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