Development of New Social System Utilizing Natural Energy

1.为了探讨夏季利用冷河水降温的可行性，对流经金泽南部地区的长坂明渠进行了实例研究。(1)在3天内，在3 km的距离内分散的5个点测量了两次水温和流量。结果表明，上游水温保持在20 <plus-minus>1 ℃左右，而大气温度在28 ℃左右波动。(2)作为案例研究，选择了一个特定的地方，具体估算了冷却成本。本研究以风机盘管冷却器为研究对象。用电风扇冷却散热器盘管中的泵水。结果发现，FCU冷却每小时的成本比普通的电冷却器低15日元2。用热管提取内川坝湖冬季相当于8 ℃水的热量，用于融雪3个月。通过数学分析验证了融雪的发生.于1996年冬季在某污水控制中心对污水和处理水的温度进行了测量。冬季水温与大气温度之差为10摄氏度，这一数值足以使雪融化。为了评价洒水的冷却效果，1995年夏天，用处理后的污水喷洒棒球场。发现大气温度下降约4摄氏度。

1. To investigate the feasibility of cooling at summer by cold river water, a case study was made concerning Nagasaka open channel, which flows down irrigating the southern district of Kanazawa. (1) The water temperature and flow were measured twice during 3 days at 5 points scattered in the distance of 3 km. It was disclosed that the water temperature at the upper stream was kept at 20<plus-minus>1ﾟC, whereas the atmospheric temperature fluctuated around 28ﾟC.A mathematical model based on heat transfer theory was constructed to explain the measured temperature of water. (2) As a case study, a specificplace was chosen to concretely estimate costs for cooling. A fan-coil unit cooler (FCU) was assumed in present study. The pumped-up water in radiator coil was cool-ed with an electrical fan. It was found that cooling by FCU costs 15 yen less per an hour than by an ordinary electrical coole2. The heat equivalent to 8ﾟC water at Uchikawa dam lake in winter was extracted with a heat pipe and used for snow melting for 3 months. The occurrence of snow melting was verified through mathematical analysis.3. Temperatures of sewage and treated water were measured in winter of 1996 at a sewage control center. The difference between the water and atmospheric temperatures in winter was 10ﾟC, which value is sufficient for snow melting.4. To evaluate the cooling effect of sprinkling grounds with water, a baseball ground was sprinkled with the treated sewage water in summer of 1995. It was found that the drop in atmospheric temperature was about 4ﾟC.