Air-cooled water chiller with natural cooling function and control method for water chiller

Abstract

Disclosed are an air-cooled water chiller with a natural cooling function and a control method for the water chiller. The air-cooled water chiller with the natural cooling function comprises a compressor, a condenser, a throttler and an evaporator which are sequentially connected, a condensate fan is arranged on the condenser, the air-cooled water chiller further comprises a natural cooling coil, a three-way valve, an inlet chilled water temperature sensor, an outlet chilled water temperature sensor, an outdoor environment temperature sensor and a controller, the natural cooling coil is arranged on an air inlet side of the condenser, the three-way valve comprises a first joint, a second joint and a third joint and is serially connected onto a water inlet pipe of the evaporator through the first joint and the second joint, a water inlet pipe of the natural cooling coil is communicated with the water inlet pipe of the evaporator, and a water outlet pipe of the natural cooling coil is communicated with the third joint of the three-way valve. The air-cooled water chiller has the advantages of remarkable energy-saving effect, high running reliability, simple control method, compact structure, small occupied space and low production cost.

Description

technical field [0001] The invention relates to an air-cooled water chiller, in particular to an air-cooled water chiller with natural cooling and a control method thereof. Background technique [0002] In current communication equipment rooms, especially large data centers, air-cooled chillers are generally used as cold sources to provide chilled water for the indoor terminals of the air-conditioning equipment in the communication equipment room, thereby cooling down the indoor environment of the communication equipment room. Since the communication equipment in the communication room is basically in continuous operation throughout the year and generates a lot of heat, the air-cooled chiller used in the communication room generally needs to be cooled throughout the year, which consumes a lot of energy and has a low seasonal energy efficiency ratio. . [0003] Moreover, because the air-cooled chiller still needs to start the compressor to work in the cold winter, when the o...

AI Technical Summary

Problems solved by technology

Although this air-conditioning auxiliary cooling heat exchange device designs the heat pipe heat exchanger as forced convection heat exchange, its heat exchange efficiency and energy-saving capacity have been improved to a certain extent, but it also cannot meet the cooling and heat dissipation requirements in high-temperature and high-temperature weather, and can only be used as a An auxiliary cooling device that is independent of the compressor refrigeration and air conditioner will undoubtedly increase the investment cost for customers

In addition, the air-conditioning auxiliary cooling heat exchange device also takes up a lot of space, and it is difficult to install in small spaces such as base stations.

In addition, the control method of this air-conditioning auxiliary cooling heat exchange device needs to be compared according to the temperature difference-energy efficiency ratio diagram of the auxiliary cooling heat exchange device and the temperature difference-energy efficiency diagram of the air conditioner, which requires a large amount of experimental testing to obtain each auxiliary cooling heat exchange device. Accurate temperature difference-energy efficiency diagrams of devices and air-conditioning equipment, the cost of the experiment will be very high, and the control will be very complicated, requiring a large number of programs, the control cost is high, and the reliability is insufficient

Images