Yoshimura Hideyuki

In this study, focused on the waste heat energy from seafood processing plant as research to promote the use of unutilized energy. The waste heat energy from seafood processing plant contains large amounts of the high temperature waste gas from the production of fish cake, and the high temperature wastewater from the production of boiled whitebaits and bonito flakes. If these unutilized waste gases and wastewater could be recovered and utilized as the high heat sources, it would lead to significant energy savings. It is assumed that seawater will be used as the low heat source. Seafood processing plants are usually located close to the sea for processing fisheries caught in the sea, and we recommend the use of seawater as the cooling heat source. Therefore, it is necessary to design systems in consideration of the effects on the ocean environment in the area where seawater is discharged, which may lead to significant modification of the ocean environment. If the optimum flow rate of low heat source at maximum net power is identified, the pump power for seawater can be reduced and the flow rate of seawater into the heat exchanger can be minimized as needed, which is expected to reduce the amount of seawater contamination and lead to lower maintenance costs for the heat exchanger. As a result of this study, it was found that the optimum flow rate of low heat source exists for maximum net power and maximum turbine output. The maximum net power was higher when the temperature difference between inlet and outlet of low heat source was higher, while the maximum turbine output was higher when the temperature difference between inlet and outlet of low heat source was lower.