FIELD TESTS AND SIMULATION ANALYSIS OF THERMOSYPHONIC SOLAR WATER HEATERS

抄録

Thermosiphonic solar water heaters (SWHs) have still great potential for domestic hot water demand in Japan. Some new distribution systems for SWHs have come into the market to use solar heat in a more convenient and comfortable way. Therefore, an annual field test for 3 SWHs with 3 distribution systems was held in Tsukuba, which showed that the solar contribution was about 20MJ/day and that the solar efficiency was between 22 and 38%. Then, all effective daily data were simulated by TRNSYS18 and the calculated results showed good agreement to the field data.