Abstract
This study examines the effect of an air-based solar heating system that can be used directly for convection heating while minimizing thermal leakage. To compare the effect of reducing the heating and hot water load when using the system, a simulation model of the system is created, and annual load calculations are performed. The results of the simulation study show that the annual heating load is reduced by 5.39 GJ and the hot water load is reduced by 10.32 GJ when using the air-based solar heating system, resulting in a 48.3% annual load reduction effect. In addition, by analyzing the thermal balance of the indoor space based on the application of the air-based solar heating system, the problem of the existing system is elucidated. In order to improve the performance of the system as shown in the thermal balance, it is necessary not only to improve the performance of the collector, but also to review its thermal storage, insulation, and proper control.
Highlights
Renewable energy from various sources is being utilized more efficiently because of the continuous increase in energy demand, environmental deterioration because of greenhouse gas emissions, and increasing fuel prices
In order to verify the improvement of the indoor thermal environment and the effect of load reduction according to the application of the air-based solar heating system, a general house without reduction according to thewas application the Figures air-based system, a general house without a solar heating system calculatedoffirst
9 shows the controlfor of solar heating system used in this study.was
Summary
Renewable energy from various sources is being utilized more efficiently because of the continuous increase in energy demand, environmental deterioration because of greenhouse gas emissions, and increasing fuel prices. In a study on the performance of a solar collector via simulations, Dorfling reported a convective and conductive heat transfer model of a collector with linear low-density polyethylene microcapillary films and investigated the feasibility by comparing it with an experimental model [4]. Air is the ultimate receiver of energy, and there is no problem of leakage; air can be used by the ventilation system For these reasons, the use of air-based solar heating systems has increased rapidly in recent years in Japan, where convective heating is predominant. There has been an increasing amount of research on the proposal and performance evaluation of heating systems using an air-based solar heating system [25,26,27]. By confirming the balance of the movement of solar heat introduced to the room, this basic data for the improvement of the system can be used in the future
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