Fulfill Cooling Demand of Production Shop During Winter by Cooling Towers for Energy Saving in Cigarette Factory

In order to reduce the energy consumption of centralized air conditioning system in cigarette factory,taking Hangzhou Cigarette Department as an example,the cooling demand of production shops with large heat production in winter was fulfilled by cooling towers through analyzing the cooling demand of production shop and outdoor weather conditions of Hangzhou in winter,and adding two sets of plate heat exchangers and corresponding bypass pipelines to the existing refrigeration station.The analysis results of thermal characteristics of the cooling tower running in winter indicated that one heat exchanger should work in conjunction with two cooling towers and two cooling water circulation pumps to reach a cooling capacity comparable to that of one water chiller.Comparing with the water chiller,cooling tower could reduce energy consumption by more than 60% in winter,i.e.2.59 million kWh electric power or 2.07 million RMB Yuan per year.