Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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A Study on Improved Heating Performance of an Apartment Housing Unit

공동주택 세대별 난방 성능 개선 연구

  • Seo, Jeong-Ah (Department of Mechanical Engineering, Sejong University) ;
  • Shin, Younggy (Department of Mechanical Engineering, Sejong University) ;
  • Kim, Yong-Ki (Korea Institute of Civil Engineering and Building Technology) ;
  • Lee, Tae-Won (Korea Institute of Civil Engineering and Building Technology)
  • Received : 2015.11.23
  • Accepted : 2016.01.11
  • Published : 2016.02.10
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Abstract

Most hot water heating valves for apartments are constant-flow types, which limit the flow rate through an individual household for even distribution of heating water to other households. The constant-flow type is implemented by an on-off control. As a result, heating water is supplied intermittently and hence, indoor air temperature also fluctuates. Returning water temperature is also high, which reduces energy efficiency. To implement continuous feedback control, the indoor temperature dynamics was simulated to fit a measured temperature history by a state-of-the-art physical model. From the model, it was found that the most important disturbance is outdoor temperature and its effect on indoor temperature lasts about an hour. To cope with the slow response and the significant disturbance, a prediction control with proportional feedback is proposed. The control was found to be successful in implementing continuous heating water flow and improved indoor temperature control.

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References

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