Experimental Study on a Photovoltaic Direct-Drive and Municipal Electricity-Coupled Electric Heating System for a Low-Energy Building in Changchun, China

Qi Zhao (), Xiaoyue Liu, Shijie Gu, Jin Tao, Wende Wu, Shuang Ma and Hongwen Jin
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Qi Zhao: School of Energy and Power, Changchun Institute of Technology, Changchun 130012, China
Xiaoyue Liu: School of Energy and Environmental Engineering, Jilin University of Architecture and Technology, Changchun 130114, China
Shijie Gu: School of Energy and Power, Changchun Institute of Technology, Changchun 130012, China
Jin Tao: School of Energy and Environmental Engineering, Jilin University of Architecture and Technology, Changchun 130114, China
Wende Wu: Urban Construction College, Changchun University of Architecture and Civil Engineering, Changchun 130604, China
Shuang Ma: School of Energy and Power, Changchun Institute of Technology, Changchun 130012, China
Hongwen Jin: School of Energy and Power, Changchun Institute of Technology, Changchun 130012, China

Energies, 2024, vol. 17, issue 9, 1-25

Abstract: This paper takes a low-energy building in Changchun, China, as an object to test and study the characteristics of two heating modes, AC/DC (Alternative current/Direct current) switching and AC/DC synthesis, from the perspectives of temperature change, irradiation intensity, power generation, electricity consumption, etc. Firstly, the experimental research was conducted under two heating cable modes by establishing mathematical models and a test rig, and it was found that the photoelectric conversion efficiency on sunny, cloudy, and overcast days was 18%, 14.5%, and 12%, respectively. A simulation model was established by TRNSYS to run an ultra-low-energy building throughout the year. It was found that the highest and lowest monthly power generation occurred in February and July, respectively. The annual power generation of the system was 6614 kWh, and the heating season power generation was 3293.42 kWh. In the current research, the DC electricity consumption was slightly higher than the AC electricity consumption. Under conditions of similar radiation intensity and power generation, the indoor temperature of the AC/DC synthesis cable heating mode were 1.38% higher than the AC/DC switching heating able mode, and the electricity consumption were 10.9% and 4.76% higher, respectively, than those of the AC switching heating cable mode. This is of great significance for clean-energy heating, energy savings, and emissions reduction in northern China.

Keywords: solar photovoltaic; low-energy building; heating system; experiment (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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