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

Author

Listed:
  • Qi Zhao

    (School of Energy and Power, Changchun Institute of Technology, Changchun 130012, China
    Current address: Construction Energy Supply and Indoor Environment Control Engineering Research Center of Jilin Province, 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
    Current address: Construction Energy Supply and Indoor Environment Control Engineering Research Center of Jilin Province, Changchun 130012, China.)

  • Hongwen Jin

    (School of Energy and Power, Changchun Institute of Technology, Changchun 130012, China
    Current address: Construction Energy Supply and Indoor Environment Control Engineering Research Center of Jilin Province, Changchun 130012, China.)

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.

Suggested Citation

  • Qi Zhao & Xiaoyue Liu & Shijie Gu & Jin Tao & Wende Wu & Shuang Ma & Hongwen Jin, 2024. "Experimental Study on a Photovoltaic Direct-Drive and Municipal Electricity-Coupled Electric Heating System for a Low-Energy Building in Changchun, China," Energies, MDPI, vol. 17(9), pages 1-25, April.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:9:p:2048-:d:1383059
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    References listed on IDEAS

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