成果報告書詳細
管理番号20150000000346
タイトル*平成26年度中間年報 再生可能エネルギー熱利用技術開発 その他再生可能エネルギー熱利用トータルシステムの高効率化・規格化/温泉熱地域利用のためのハイブリッド熱源水ネットワーク構築技術の研究開発
公開日2015/12/2
報告書年度2014 - 2014
委託先名株式会社総合設備コンサルタント 公立大学法人大阪市立大学
プロジェクト番号P14017
部署名新エネルギー部
和文要約
英文要約Technological development in Renewable Energy: Geothermal Energy/ The study for its higher efficiency and standardization of the process / The research and development of construction technology for hybrid heat source water supply network to promote the utilization of geothermal energy.

(1) Domestic and foreign exploration and development of geothermal energy: In Kusatsu Hot spring in Gunma, it has been conducted a central control system, which utilize specific pipe made out of thermosetting resin, to supply the hot water. Although the straight part of those pipes costs only about 50.000JPY (φ250mm), the use of specific joints and complex set up for the insulation makes it quite costly.
Whistler Olympic village is shown as a foreign example of the hybrid heat source water supply network. In this village, waste water was used as a heat source, furthermore, it did provide around 95% of demand energy for the air-conditioning and the hot water supply. In this system, waste heat energy coming from the sewage is at low temperature.
(2) Factual investigation of energy utilization in hot spring resort area: The survey is conducted to acknowledge the energy use in two traditional hotels (Hotel A: having 80rooms, B: having 15 rooms) in Shima. As a result, potential storage of hot water, including hot spring source and discharge water is approx.35GJ/day in A and approx.2.2GJ/day in B. Meanwhile thermal demand is approx.8.5GJ/day in A and approx.2.2GJ/day in B.
(3) The study for flowing liquid film exchanger in geothermal energy: In order to correspond to various hot spring water qualities, an experimental study was conducted, by dipping different materials into several types of hot spring
(4) Heat exchanger for preheating discharge water: The preliminary experiment for heat exchanger to preheat the discharge water is conducted. This device is to settle under the bath room.
(5) The study for heat retaining pipe: Heat retaining pipes and thermal barrier coated pipes is compared. Consequently, it is revealed that as long as the pipe’s φ is 300mm and its length is 400m, the heat loss of both pipes accounts for few percent compared to their thermal potential, means it would be not crucial issue.
(6)Feasibility study: According to the case studies in four different hotels having high temperature hot spring sources, the hybrid heat source water supply network, initial cost would be 3.5 hundred million yen. In other words, the payout period would be about 14 years. Furthermore, in terms of initial cost, it is 10.2% lower than the system using heat hot springs in the central heat supply plant , namely it can be significant to innovate hybrid heat source water supply network.
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