Effects of Regional Weather and Climate Change Scenarios on Solar-Assisted Ventilation Preheating in Weaner Houses

Jeonghwa Cho

doi:10.5389/KSAE.2026.68.5.111

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2026 Vol.68, Issue 5 Preview Page

Effects of Regional Weather and Climate Change Scenarios on Solar-Assisted Ventilation Preheating in Weaner Houses 지역 기상과 기후변화 시나리오가 자돈사 태양열–팬코일 환기예열에 미치는 영향

30 September 2026. pp. 111-118

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Abstract

A thermosyphon solar water heater coupled to a fan-coil unit can preheat outdoor ventilation air in weaner houses. Performance from one farm and one winter month does not show how the same 6 m² collector and 400 L storage would behave under other Korean regional weather files or climate change scenarios. This study reused a calibrated TRNSYS model of a commercial weaner house and the solar-fan-coil plant, changing only the December weather series and collector slope. Zone air temperatures measured at a mechanically ventilated farm in Suncheon in December 2020 were used to calibrate the house model; the pig-room root-mean-square error was 0.83°C. That comparison is a calibration fit, not an independent validation. Each case ran for 716 h at a 3 min time step with 100% outdoor air. The weather set comprised Suncheon measurements; typical meteorological year files for Suncheon, Iksan, Seosan, Icheon, and Wonju; and +2.2°C and +2.9°C shifts representing mid-century SSP2-4.5 and SSP5-8.5 warming with solar radiation held at measured Suncheon values. The unheated heating load ranged from 149.8 GJ under the SSP5-8.5 shift to 228.2 GJ in Icheon. Absolute heating offset tracked December irradiance more closely than outdoor temperature. The fractional offset was lowest in Iksan, where irradiance was weakest, and rose when warming reduced the load at fixed solar input. Raising collector slope from 33° to 50° changed the 716 h offset only slightly. The plant remains a supplementary preheater; a single national solar fraction is not appropriate.

Keywords

Weaner house

solar thermal

fan-coil unit

ventilation preheating

climate change

TRNSYS

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Information

Publisher :The Korean Society of Agricultural Engineers
Publisher(Ko) :한국농공학회
Journal Title :Journal of Korean Society of Agricultural Engineers
Journal Title(Ko) :한국농공학회논문집
Volume : 68
No :5
Pages :111-118
Received Date : 2026-09-03
Revised Date : 2026-09-08
Accepted Date : 2026-09-09
DOI :https://doi.org/10.5389/KSAE.2026.68.5.111

Journal of Korean Society of Agricultural Engineers ISSN:1738-3692(Print) 2093-7709(Online) 한국농공학회논문집

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