Abstract
The concept of zero energy buildings (ZEBs) has recently been actively introduced in the building sector, globally, to reduce energy consumption and carbon emissions. For the implementation of ZEBs, renewable energy systems, such as solar collectors, photovoltaic (PV) systems, and ground source heat pump (GSHP) systems, have been used. The system performance of solar collectors and PV systems are dependent on the weather conditions. A GSHP system requires a large area for boring machines and mud pump machines. Therefore, inhabitants of an existing small-scale buildings hesitate to introduce GSHP systems due to the difficulties in installation and limited construction area. This study proposes an integrate photovoltaic-thermal (PVT) and air source heat pump (ASHP) system for realizing ZEB in an existing small-scale building. In order to evaluate the applicability of the integrated PVT-ASHP system, a dynamic simulation model that combines the PVT-ASHP system model and the building load model based on actual building conditions was constructed. The heating and cooling performances of the system for one year were analyzed using the dynamic simulation model. As the simulation analysis results, the average coefficient of performance (COP) for heating season was 5.3, and the average COP for cooling season was 16.3., respectively. From April to June, the electrical produced by the PVT module was higher than the power consumption of the system and could realize ZEB.
Highlights
The reduction of carbon emissions, and energy consumption by heating and cooling requirements, have attracted urgent attention globally
For the implementation of zero energy buildings (ZEBs), high-efficiency heating, and cooling air-conditioning systems based on heat pumps have been introduced together with renewable energy systems
In order to evaluate the applicability of the integrated PVT-air source heat pump (ASHP) system to existing small-scale building, a dynamic simulation model that combines the PVT-ASHP system model and the building load model based on actual building conditions was constructed
Summary
The reduction of carbon emissions, and energy consumption by heating and cooling requirements, have attracted urgent attention globally. Owing to this global trend, the policy of zero energy buildings (ZEBs) has shifted from the public to private sector. For the implementation of ZEBs, high-efficiency heating, and cooling air-conditioning systems based on heat pumps have been introduced together with renewable energy systems. In the United States, heat pumps have been installed in more than 40% of new singlefamily dwellings, and approximately 50% of multi-family buildings. Account for half the European heat pump market; Sweden, Finland, and Norway, show high penetration rates corresponding to more than 24 units per 1000 households, annually [1]. Heat pumps have been actively applied for building heating and cooling in northeast Asia: China, Japan, and the Republic of Korea
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