Numerical Investigation And Experimental Study On Coil Falling Film Evaporator For Refrigeration Unit

Evaporator is one of the four core components of the refrigeration system, its pros andcons will have a direct impact on the performance of process of energy conversion, utilizationand system power consumption. Study on enhanced heat transfer technology, developing newenergy-efficient technologies, development of energy-saving and high-efficient evaporator forrefrigeration systems are extremely important practical significance. For existingdry-evaporator low efficiency and Flood Evaporator high Refrigerant Consumption, This topichave come up with a new type of spiral coil pipe falling film evaporator，used it inrefrigeration units to improve efficiency and to achieve the goal of energy saving and emissionreduction.This topic System introduced the experimental research progress of falling-filmevaporator at home and abroad and carefully compares each Numeric calculation model tofind an optimal method for the designing of spiral coil pipe falling film evaporator. Due to thespiral coil pipe falling film evaporator is similar with the horizontal falling film evaporator，Soreference the numeric model of horizontal falling film evaporator numeric calculation, usingthree dimensional software to design the evaporator structure，and using the CFD software tosimulate and optimize the liquid distributor.Depending on the designed spiral coil pipe falling film evaporator, select match otherrefrigeration parts, and making refrigeration units to study the spiral coil pipe falling filmevaporator performance. Through careful analysis of the experimental data, found use of spiralcoil pipe falling film evaporator can effectively improve the energy efficiency of smallrefrigeration unit, spiral coil pipe falling film evaporator has a good value to use in smallrefrigeration units.