Investigation on the exhaust heat marine products drying integrated to a bottom sea water desalinization cycle

摘要

In order to improve energy saving performance of the marine products air drying process, a high efficient polygenration system with integration to a bottom coproduction process is proposed. In the top cycle, the engine exhaust waste heat is used as heat source, and the moisture in the wet marine products is removed by the recycled air. In the bottom power and fresh water coproduction cycle, the sensible heat and latent heat in the wet air of the top cycle are recovered to generate power and fresh water. The results showed integrating the bottom cycle is an effective method to improve energy saving performance of the top marine products air drying system, and the correspondingly overall relative primary energy consumption ratio (RPER) of the top cycle can be deceased to lower than 1. Increase of dew point temperature of the wet air leaving the drying cabin is an effective method to improve overall thermal performance of the polygenration system, and the net power output is achieved with T-1_dew over 333 K, due to a good thermal match between the wet air and the sea water of the bottom cycle. Also the suitable evaporating pressure range of the bottom cycle is recommended for different working condition in this research. (C) 2017 Elsevier Ltd. All rights reserved.