Abstract
This paper proposed an experimental test: the solar water-heating system was been monitored for a whole year to analyze collector performance in an actual operation process. Heat-collecting efficiency, heating capacity, power consumption, and heat required were analyzed theoretically. Results showed that solar irradiance and ambient temperature were positively correlated with heat collection efficiency, and the daily average heat collection efficiency was up to 56.63%. In winter, the auxiliary heat source consumed the most power, almost all of which bears the heat of users. The heat collection in summer met the demand for hot water, and the guarantee rate of solar energy could reach 100%. The energy saving properties and CO2 emission reduction were analyzed. This system had a significant effect on the energy-saving effect and environmental protection. The analysis showed that the hot-water system can fully meet the design requirements under the condition of relatively sufficient solar energy, and can operate stably, which has a certain guiding significance for the design and application of large-scale solar hot-water systems.
Highlights
As the basic material for people living, energy is an important guarantee for the development of the national economy
The rapid development of the world economy has aggravated the spread of energy shortage and environmental pollution
The Solar Water-Heating system was identified as a potential technology that effectively converts solar energy to thermal energy [4]
Summary
As the basic material for people living, energy is an important guarantee for the development of the national economy. Due to disadvantages of solar power, such as discontinuity, a solar hot-water system can add an auxiliary heat source; the air-source heat pump has a good energy saving effect [13,14]. It is affected by objective factors, such as site conditions, and the auxiliary heat source can use electric heating [15]. The research results provide certain theoretical support for the application of solar energy and air-source heat pumps in buildings, and it has great significance for the promotion of energy-saving and emission-reduction technologies, the development of clean energy, and the realization of scientific energy use. The influence mechanism of external parameters on the comprehensive performance of the system was analyzed in the paper
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