{"id":41140,"date":"2023-07-07T06:00:18","date_gmt":"2023-07-06T21:00:18","guid":{"rendered":"http:\/\/kochihen.replan.ne.jp\/?p=41140"},"modified":"2023-07-07T21:36:23","modified_gmt":"2023-07-07T12:36:23","slug":"%e3%80%90%e5%8c%97%e6%b5%b7%e9%81%93%e3%83%bb%e6%b7%b1%e5%b7%9d%ef%bc%88%e7%9c%81%e3%82%a8%e3%83%8d2%e5%9c%b0%e5%9f%9f%ef%bc%89%e3%81%ae%e5%a4%aa%e9%99%bd%e5%85%89%e7%99%ba%e9%9b%bb%e5%b9%b4%e9%96%93","status":"publish","type":"post","link":"http:\/\/kochihen.replan.ne.jp\/?p=41140","title":{"rendered":"\u3010\u5317\u6d77\u9053\u30fb\u6df1\u5ddd\uff08\u7701\u30a8\u30cd2\u5730\u57df\uff09\u306e\u592a\u967d\u5149\u767a\u96fb\u5e74\u9593\u5b9f\u6e2c\u30c7\u30fc\u30bf\u3011"},"content":{"rendered":"

\"\"<\/a>
\n\"\"<\/a>
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\n\"\"<\/a>
\n\"\"<\/a>
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English version\u2b07<\/p>\n

Annual Measured Data of Solar Power Generation in Fukagawa, Hokkaido (2 energy-saving regions)
\nFukagawa City is at the forefront of the challenge, and has the heaviest snowfall climate in Hokkaido. The frontier challenge is to further improve the performance of facilities based on the wealth of insulation experience and knowledge. The frontier challenge to the equipment performance.<\/p>\n

Now from the presentation at the recent 6\/24 Shinjyukyo Hokkaido\/Asahikawa meeting. The presentation was on the actual measured values of the installation and running of a photovoltaic power generation system in a maisonette-type rental apartment with six units and a total floor area of 499.85 m2 (about 151 tsubo).
\nAs for the performance of the building, the Ua value (average thermal transmittance coefficient of the outer skin) of 0.17-0.2. The performance level is 0.2 for units facing the exterior wall and 0.17 for intermediate units.
\nFukagawa City in Hokkaido, where the house was built, is classified as an area 2 under the energy conservation standard, but the conditions seem to be as close to area 1 as possible. The annual minimum temperature is 21.5 degrees below zero. Compared to Asahikawa, a representative city of one region, where the annual minimum temperature is 41.0 degrees below zero and the annual snowfall is 557 cm, it is not as cold, but the snowfall is much heavier. This makes the area unsuitable for solar power generation. The area’s characteristics are such that it is not suitable for solar power generation.
\nThis is a case where Moriei Construction, a local construction company working on highly insulated and airtight housing, built the house and continued to measure the actual performance afterwards. Hokkaido is a region with extremely harsh conditions for solar power generation, and it is considered to be one of the worst regions in terms of heavy snowfall.
\nThe photovoltaic power generation system installed in such climatic conditions is 6.75Kw on the roof surface, and of course, it is also installed on the wall surface during winter because it cannot generate power due to snow accumulation. The exterior photo shows the view from the west side looking south. It is not a densely populated area, so the shadow effect is minimal in terms of solar radiation acquisition conditions.<\/p>\n

The figure above is a graph and table of actual measured data. Roof surfaces generate almost no electricity from December to February, and then recover rapidly from March. On the other hand, the wall installation shows a modest power generation efficiency even during the winter period. In terms of the power generation rate index, 90.7% for the south side installation and 58.5% for the west side installation compared to 100% for the roof side. In total, this was an example of achieving ZEH.
\nAs mentioned earlier, the Hokkaido region has a very cautious community mentality toward solar power generation. Due to snow conditions, roof-mounted solar power generation systems do not generate electricity for three months in winter, and home builders in this region are most concerned about dealing with snow loads, and basically want to avoid problems caused by installing equipment that would further complicate these conditions.
\nThis is the very reason why the region is “at the forefront of issues. I applaud the frontier spirit that dared to take this approach in such a region.
\nDr. Kamata of the New JCMA also commented that the data would be very valuable for the New JCMA to analyze. As a leading example of solar power generation in snowy and cold regions, we hope that the research will continue and that more rational criteria will be established.<\/p>\n","protected":false},"excerpt":{"rendered":"

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