Design of prefabricated high-efficiency refrigeration room based on full life cycle cost

Abstract

To ensure optimal energy conservation and economic benefits in the design of prefabricated high-efficiency refrigeration room, an optimization method to achieve the lowest life cycle cost by studying the layout of refrigeration room and unit matching method was proposed. The number of chiller units under the same cooling load, the placement of chiller units, the placement of cooling (freezing) pump, the chiller inlet and outlet location, the connection Angle between the inlet and outlet of the equipment and the branch pipe, and the corresponding relationship between the unit and the pump were taken as the influencing factors of the whole life cycle costs, and the cooling load 1100RT is taken as an example. The results show that at 1100RT, two chillers are used, the units are placed on the lateral side, the inlet and outlet of the unit's freezing end and cooling end are located at both ends of the fuselage, the unit and the pump correspond one by one, and the freezing and cooling pumps are located on both sides of the unit. The solution that the equipment is connected to the pipeline at 90° is the best one, and the corresponding relationship between the unit and the pump is the main factor affecting the whole life cycle costs. The second is the connection Angle between the inlet and outlet of the equipment and the branch pipe. Although the 60° connection can improve the hydraulic condition, it increases the room area and initial investment costs by 35% compared with the 90° connection mode.

Keywords

• high efficiency refrigeration room
• chiller units
• cooling load
• prefabricated
• full life cycle