Study On Air Conditioning On Cargo Ship Using The Waste Heat Of The Jacket Water Of Diesel Engine

Saving energy is a hot topic in ship building and ocean shipping industry around the world. It relates to reducing the fuel consumption, environment protection, running profit and so on.The compression refrigerator is commonly adopted in marine air conditioning of most serving cargo ships. On the one hand, the consumption of electric energy is very large, on the other hand, CFC is dangerous to ozone sphere. Furthermore, some conditioning airs is circulated to reduce the load of air conditioning, the percentage of circulated air is upto 40-70% ,this results poor air quality.On base of studying low temperature waste heat recovery technology, this paper puts forward to replace the circulated air by fresh air, make full of the wasted heat in the jacket cooling fresh water for warming and chilling the fresh air.The purpose of this paper is that the jacket cooling fresh water after fresh water generator heats the fresh air in the fin-tube heat exchanger characterized by small volume and high efficiency to warm; heats working fluid with low boiling temperature to chill by steam-jet refrigerating machine.This paper demonstrates the feasibility of idea by calculation:(1) The feasibility of warming plan in winter is proved by caculation from energy conversion, type selection method of the key device—fin tube heat exchanger is given bycaculation.(2) The feasibility of chilling plan in summer is proved by caculation from energy conversion, the heat transfer coefficiencyof two phase in the key device—shell and tube heat exchanger is given.The results of calculation indicates that the above two projects are feasible from theory.