Abstract
The validity of SPREEM was tested in performance improvement of the DHC. Accuracy of the existing reproduction calculation by SPREEM was shown, and the result was validated. Two improvement plan were examined. In Case 1, the steam driven turbo-refrigerator was removed, and high efficiency gas engines and electric turbo-refrigerators were installed. And gas engines generate electricity and drive electric turbo-refrigerators. In Case2, the steam driven turbo-refrigerator was removed furthermore and it was moved in electromotive turbo-refrigerators. And the operating sequence of the machinery was made adequate. As a result, large reduction effect of the energy was found in especially Case 2. The mechanism of the reduction were shown in detail, too. Easy operation and high accuracy in the calculation result were proved.
