Ultrahigh-rate liquid supply falling-film evaporative water chilling system

Abstract

The invention discloses an ultrahigh-rate liquid supply falling-film evaporative water chilling system and provides a system which can use a solution pump to realize ultrahigh-rate liquid supply and can provide low-temperature cold water. The exhaust port of a refrigeration compressor is connected with the inlet of a condenser, the outlet of the condenser is connected with the gas-liquid inlet of a falling-film evaporator through a throttling device, the gas outlet of the falling-film evaporator is connected with the suction port of the refrigeration compressor, the liquid outlet of the falling-film evaporator is connected with the inlet of the solution pump, the liquid outlet of the solution pump is connected with a liquid distribution pipeline inlet in the upper part of the falling-film evaporator, liquid is supplied to a liquid distributor in the falling-film evaporator through a liquid distribution pipeline, and ultrahigh-rate liquid supply circulation is realized by using the solution pump. A water chilling unit provided by the invention realizes the ultrahigh-rate liquid supply circulation through the effect of the solution pump, the heat exchange capacity between refrigerant liquid and a heat exchange pipeline is increased, the heat exchange efficiency is improved, the magnitude of the heat exchange capacity of the system is convenient to control, the cold water outlet temperature can reach approximate 2DEG C, and the ultrahigh-rate liquid supply falling-film evaporative water chilling system can be widely used for air conditioning systems which need low-temperature cold water.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a falling-film evaporation cold water system which utilizes a solution pump to realize super-doubling liquid supply. Background technique [0002] During the operation of the air conditioner, chillers are often used to provide the required cold water for the air conditioner system. [0003] At present, in chillers using shell and tube evaporators as evaporators, dry evaporators, flooded evaporators and falling film evaporators are mostly used as evaporators, and the temperature of the output cold water is above 5°C. Among them, the falling film evaporator has a higher heat exchange efficiency. [0004] In the current water chiller with falling film evaporator, the liquid supply method is to directly spray the throttling gas-liquid two-phase refrigerant to the outer wall of the shell-and-tube evaporator. Since the gas-liquid two refrigerants after throttling are directly s...

AI Technical Summary

Problems solved by technology

Since the gas-liquid two refrigerants after throttling are directly sprayed to the outer wall of the pipe, the temperature of the cold water outlet is completely controlled by the liquid supply volume of the refrigerant and the flow of cold water. The temperature of the cold water outlet evaporator is generally above 5°C, which cannot meet lower The water supply needs of cold water, and the heat exchange efficiency needs to be improved

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