Abstract
The practical design method on the chain-like connected closed-type thermal storage tanks, which has capacity of 120 m3, has been clarified as follows;
1) The combination of two perforated plates are installed at the top and the bottom of every storage tank as a rectifier to obtain uniform velocity distribution. Pressure drop at each perforated plate set the same value as dynamic pressur of the upper stream. The rectifier indicates very high performance of uniformity, such as 0.03 to 0.14 level of standard deviations.
2) The estimation method for evaluating amount of the mixing volume in the storage tank are found out using the behabior of temperature response of the tank with stepwise change of inlet.
3) The Archimedean number define as inlet condition of the tank, namely Arin, will be kept larger than 0.5 to get the mixing volume less than 10% of the tank volume.
4) Around 0.1 of Arin gives the minimum tank wall volume, that is most economical design point.
