A Study on the Calculating Method for the Loads of Domestic Hot Water Supply Systems : Part 2-Calculation of the Loads and Hot Water Storage Tank Capacity

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  • 住宅における給湯負荷算定法に関する研究 : 第2報-給湯負荷と貯湯槽容量の算定
  • 住宅における給湯負荷算定法に関する研究-2-給湯負荷と貯湯槽容量の算定
  • ジュウタク ニ オケル キュウトウ フカ サンテイホウ ニカンスルケンキュウ

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The purpose of this study is to suggest the calculating methods for the loads and capacity of a storage tank of hot water supply systems in dwelling houses. The authors analyzed the usage in each fixture of the hot water supply systems on the basis of the data which had been measured in five dwelling houses for one or two years. These contents are as follows; frequency, duration time, discharge flow rate used in the hot water supply systems. The hot water temperature used in each facility has been shown in the paper of part 1. The models for calculation of the loads in hot water supply systems were prepared on the basis of these analysis. The models were considered on the effects of the number of flats, because the frequency of hot water uses in each fixture per flat is gradually reduced according to increase of the number of flats. As for the calculating method of hot water consumption, Monte Carlo Simulation was adopted. This paper showed the results of hot water consumption calculated in each interval of time through a day. The relationships between the volume of hot water consumption per flat and the number of flats were clarified. Also, the relationships between the instantaneous maximum flow rates and the fixture units in each hot water facility were analyzed using the same method that had been suggested for cold water supply systems by S. MURAKAWA. On the basis of the hot water flow rates calculated for 24 hours, the capacity of a storage tank and heater was analyzed using a simulation method. A calculating method for the capacity of a storage tank and heater was suggested to alter the existing method.

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