温室効果ガス排出量削減のための船舶機関低温廃熱の空調への応用

Abstract

In this study, surplus of high temperatures and low temperatures waste heat from two engine systems during voyage on board training ship, Shioji-maru and Seiun-maru, were measured. Based on measured values, the reductions of CO2 as GHG (Green House Gas) emission were estimated. In the case of effective utilization of waste heat energy performed by air-conditioning, cold storage, and other appliances, effects of each parameter on COP (Coefficient of Performance) of absorption refrigerator were showed. The following results were obtained: (1) for an application of a single-effect absorption refrigeration system to the Sioji-maru, CO2 can be reduced at about maximum of 9% and refrigerating capacity can be expected at about 350 kW from the measured data, (2) for an application of a single-effect absorption refrigeration system to the Seiun-maru with distilled water plant at 50% working rate, CO2 can be reduced at about maximum of 11.5% and refrigerating capacity can be expected at about 430 kW. Also CO2 can be reduced at about maximum of 21.5% and refrigerating capacity can be expected at about 825 kW for an application of a double-effect absorption refrigeration system to the Seiun-maru with used steam of 50%, (3) application of variable seawater temperature, used temperature, and difference concentration of liquid solution to double-effect absorption refrigeration system showed smaller effect for reduction of CO2 than applied to the single-effect one, (4) the COP and reduction of CO2 increased at low seawater temperature and high used temperature, and those also increased when applied a great difference concentration of liquid solution.