16 0 0 0 OA 健康維持がもたらす間接的便益(NEB)を考慮した住宅断熱の投資評価
- 著者
- 伊香賀 俊治 江口 里佳 村上 周三 岩前 篤 星 旦二 水石 仁 川久保 俊 奥村 公美
- 出版者
- 日本建築学会
- 雑誌
- 日本建築学会環境系論文集 (ISSN:13480685)
- 巻号頁・発行日
- vol.76, no.666, pp.735-740, 2011-08-30 (Released:2012-01-13)
- 参考文献数
- 23
- 被引用文献数
- 35 23 7
It takes many years to recover the initial investment cost for installing housing insulation through savings from energy reduction (Energy Benefit: EB), since construction cost is very high in Japan. This long payback time is the major barrier to the promotion of well-insulated houses. However, it has been found that if Non-Energy Benefits (NEB) of well insulated houses, such as improvement in personal health, reduction of medical expenses and decline in absences from work are all taken into account, the time required to recover the initial investment cost would change from 29 to 16 years. Therefore recognition of NEB is expected to encourage residents to invest in residential thermal insulation. NEB of well-insulated houses is thus evaluated regarding human health in this study.
- 著者
- 鈴木 大隆 北谷 幸恵 岩前 篤 永井 久也 小南 和也 坂本 雄三
- 出版者
- 日本建築学会
- 雑誌
- 日本建築学会環境系論文集 (ISSN:13480685)
- 巻号頁・発行日
- vol.73, no.627, pp.591-597, 2008-05-30 (Released:2009-02-25)
- 参考文献数
- 13
- 被引用文献数
- 2 2
There are two points of view for the prevention design of moisture problem in the building insulated envelope. One is the strictly prevention of high moisture condition in the insulated wall cavity. The other one is the permission of short-term high moisture condition, condensation and high moisture content of the wooden material as long as keeping physical durability. If the later standpoint were chosen, the insulated envelope design of every variety for Japan would be possible. Nevertheless, there are no criteria to estimate the damage of physical durability of wood by the biological factors related high moisture condition. The points of this paper are as follows; 1) The importance of estimation damage of woods by the moisture problems is describes. 2) 2 case of hygrothermal steady state experiments were done to get basic acknowledge of woods damage by biological factors considering term, water content, temperature and humidity, physical durability.
3 0 0 0 OA 住宅内温度に応じた医療費推定法の提案と医療費を考慮した経済的な住宅断熱性能の検討
- 著者
- 藤田 浩司 岩前 篤 佐藤 寛 高原 梨沙子 鈴木 曜
- 出版者
- 日本建築学会
- 雑誌
- 日本建築学会環境系論文集 (ISSN:13480685)
- 巻号頁・発行日
- vol.85, no.768, pp.159-167, 2020 (Released:2020-02-28)
- 参考文献数
- 18
- 被引用文献数
- 2
The high cost of improving thermal insulation performance in houses is one of the hindrances to the spread of the improvement in thermal insulation performance, and it takes a long time to recover these costs through reduction of heating and cooling costs alone. Under such circumstances, in recent years, it has been reported that improvement in thermal insulation performance reduces the likelihood of various diseases among people inhabiting these houses, and this reduces medical costs. However, the relationship between thermal insulation performance and medical costs has not been quantitatively evaluated. If medical costs in relation to the thermal insulation performance of a house can be evaluated quantitatively, they can be taken into consideration in the recovery period of the costs of the improvement of the thermal insulation performance. Furthermore, it is possible to examine the most economical thermal insulation performance when considering the costs for thermal insulation, heating and cooling costs, and medical costs together. Therefore, in this study, we estimated the medical costs in relation to the thermal insulation performance of the house, and examined the thermal insulation performance that is most economical when the costs for thermal insulation, heating and cooling costs, and medical costs are considered. Furthermore, we examined the cost recovery period for the improvement in the thermal insulation performance from that which satisfied the 2013 standard to the above-mentioned most economical thermal insulation performance, taking into consideration the reduction in heating and cooling costs and medical costs. We assumed that the onset of various diseases is not directly affected by the thermal insulation performance of the house, but is affected by the thermal environment in the house, which is formed according to the thermal insulation performance of the house and the heating and cooling method. On the basis of the relationships between insulation levels of various houses and improvement rates in various diseases shown in the previous research, we estimated the thermal environments in houses in correspondence to each level of insulation and estimated medical costs from improvement rates in various diseases. We proposed formulas to estimate the medical costs for heart diseases and vascular brain diseases from the mean daily minimum operative temperature of the house from February 1 to February 7 and formulas to estimate the medical costs for diseases, excluding heart diseases and vascular brain diseases, from the mean operative temperature of the rooms the family inhabits from January 1 to February 28. We proposed these formulas separately for the age groups 0 to 19, 20 to 39, 40 to 59, and 60 and older. Furthermore, using these formulas, we examined the most economical insulation performance, including insulation costs, heating and cooling costs, and medical costs. The average heat transmission coefficient of the envelope (UA value) of a house having this most economical insulation performance is 0.4 to 0.5 W/m2K for a floor-insulation house, and 0.36 to 0.4 W/m2K for a foundation-insulation house. We found that by considering not only heating and cooling costs but also medical costs, the cost recovery period for the improvement in the thermal insulation performance from that which satisfied the 2013 standard to the above-mentioned most economical thermal insulation performance was significantly shortened, to around ten years.
- 著者
- 永井 久也 鈴木 大隆 北谷 幸恵 岩前 篤 小南 和也 坂本 雄三
- 出版者
- 日本建築学会
- 雑誌
- 日本建築学会環境系論文集 (ISSN:13480685)
- 巻号頁・発行日
- vol.74, no.638, pp.457-463, 2009-04-30 (Released:2009-11-24)
- 参考文献数
- 6
- 被引用文献数
- 1 1
There are two points of view for the prevention design of moisture problem in the building insulated envelope. One is the strictly prevention of high moisture condition in the insulated wall cavity. The other one is the permission of short-term high moisture condition, condensation and high moisture content of the wooden material as long as keeping physical durability. If the later standpoint were chosen, the insulated envelope design of every variety for Japan would be possible. Nevertheless, there are no criteria to estimate the damage of physical durability of wood by the biological factors related high moisture condition. In the previous paper, we reported about the concept of the prevention design of moisture problem in the building insulated envelope and the relationships between water content and decay various woods under hygrothermal steady conditions. In this paper, the relationships between water content and decay of various woods under two kinds of hygrothermal transient conditions are shown.
1 0 0 0 OA 地盤防湿処理のある住宅床下空間の温湿度性状に関する研究
- 著者
- 岩前 篤 松本 衛 近田 智也 松下 敬幸 松村 収
- 出版者
- 日本建築学会
- 雑誌
- 日本建築学会計画系論文集 (ISSN:13404210)
- 巻号頁・発行日
- vol.65, no.528, pp.29-36, 2000-02-28 (Released:2017-02-03)
- 参考文献数
- 14
- 被引用文献数
- 5 3
We found many houses have condensation in the crawl space in summer. These houses have enough openings on the foundation to ventilate and vapor retarder at the ground surface for the recommend in the building code. The temperature and humidity in the crawl space have great influences to durability of the house. We made clear the annual variations of hygro-thermal environment of the crawl space by the field measurements and numerical analysis. We monitored the temperature and humidity variations of 36 houses in Japan for 2 years. The numerical calculations based on the vertical one dimension heat transfer model represented the monitored results. The results show the houses in Japan normally have condensation in crawl space in summer. The condensation term is from one week to one month. The daily average of crawl space's vapor pressure is nearly equal to that of the outdoors. The difference of 2 years results is so great that we think the main factor is outdoor condition. The thermal resistance of the floor and moisture of the ground do not have great effect on the crawl space humidity.
1 0 0 0 OA エネマネハウス2017における『エネマネR(アール)ハウス』の省エネ・環境技術
- 著者
- 藤田 浩司 松岡 聡 岩前 篤 太田 周彰
- 出版者
- 一般社団法人 日本建築学会
- 雑誌
- 日本建築学会技術報告集 (ISSN:13419463)
- 巻号頁・発行日
- vol.25, no.60, pp.753-758, 2019-06-20 (Released:2019-06-20)
- 参考文献数
- 7
KINDAI University and various enterprises proposed a Zero-Energy-House(ZEH) called “ENEMANE R HOUSE” in ENEMANE HOUSE 2017. A real size house was built in Osaka and its environmental performance was measured in November 2017. This report presents the energy-saving and environmental technology adopted in this house and its effects. The findings show that this house achieved a ZEH status sufficiently and has excellent environmental performance.