Optimization of Solar Water Heating System under Time and Spatial Partition Heating in Rural Dwellings

Yanfeng Liu, Tao Li, Yaowen Chen and Dengjia Wang
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Yanfeng Liu: School of Environment and Municipal Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
Tao Li: School of Environment and Municipal Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
Yaowen Chen: School of Environment and Municipal Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
Dengjia Wang: School of Environment and Municipal Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China

Energies, 2017, vol. 10, issue 10, 1-19

Abstract: This paper proposes the application of time and spatial partition heating to a solar water heating system. The heating effect and system performance were analyzed under the continuous and whole space heating and time and spatial partition heating using TRNSYS. The results were validated by comparing with the test results of the demonstration building. Compared to continuous and whole space heating, the use of time and spatial partition heating increases the solar fraction by 16.5%, reduces the auxiliary heating by 7390 MJ, and reduces the annual operation cost by 2010 RMB. Under time and spatial partition heating, optimization analyses were conducted for the two system capacity parameters of the solar collector area and tank volume and the one operation parameter of auxiliary heater setting outlet temperature. The results showed that a reasonable choice of the solar collector area can reduce the dynamic annual cost, the increased tank volume is advantageous to heat storage, and the auxiliary heater setting outlet temperature have greater influence on the indoor heating effect. The advanced opening of solar water heating system and the normal opening of passive air vents are recommended. Based on the comparison of the two modes, the time and spatial partition heating technology is a better choice for rural dwellings.

Keywords: optimization; solar water heating system; time and spatial partition heating; continuous and whole space heating; passive solar houses; TRNSYS (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: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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