Method for controlling water delivery temperature of freezing water of central air conditioner
A technology of water supply temperature and central air conditioning, which is applied in the direction of temperature control, electrical program control, non-electric variable control, etc., can solve the problems of no adjustment, affecting the operation efficiency of the central air conditioning system, and difficulty in adjusting the temperature of the chilled water supply. The effect of improving energy efficiency
Active Publication Date: 2011-02-09
JIANKE CONSTRUCTINO DESIGN INST SHANGHAI
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Problems solved by technology
If the chilled water supply temperature is appropriately increased when the air-conditioning load is reduced, the operating efficiency of the chiller can be improved and the energy consumption of the chiller can be reduced. However, increasing the water supply temperature may increase the power consumption of the water pump and cause additional energy consumption. Therefore, it is necessary to Comprehensive consideration will bring difficulties to the adjustment of chilled water delivery temperature
Therefore, in the current year-round operation of the central air-conditioning system, there is generally no scientific basis for the adjustment of chilled water delivery temperature. In actual projects, adjustments are basically not made, or adjustments are made relatively casually based on the experience of operating personnel, which affects Improve the overall operating efficiency of the central air-conditioning system
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[0014] The specific embodiment of the invention will be further described below in conjunction with the accompanying drawings.
[0015] The invention relates to a method for controlling the chilled water delivery temperature of a central air conditioner, which determines the chilled water delivery temperature according to the ratio of the current total current value of the refrigerator to the maximum total current value of the refrigerator over the years. If its ratio is higher than a certain percentage constant C, the chilled water delivery temperature is controlled at the design value of the delivery water temperature, and there is no need to adjust the delivery water temperature. Conversely, if the ratio is lower than the percentage constant C, adjust the chilled water delivery temperature according to the ratio, the design value of the chilled water supply temperature, and the linear curve of the maximum allowable water supply temperature of the system under partial load co...
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The invention provides a method for controlling the water delivery temperature of the freezing water of a central air conditioner, comprising the following steps: calculating the ratio of a total current value of the current refrigerator and a maximal value of the total current of refrigerators over the years; confirming the water delivery temperature of the freezing water according to the ratio of the total current value of the current refrigerator and the maximal value of the total current of the refrigerators over the years; if the ratio of the total current value of the current refrigerator and the maximal value of the total current of the refrigerators over the years is lower than a value, adjusting the water delivery temperature of the freezing water, wherein the lower the ratio is,the higher the water delivery temperature is, and the higher the ratio is, the lower the water delivery temperature is; if the ratio of the total current value of the current refrigerator and the maximal value of the total current of the refrigerators over the years is higher than a value, controlling the water delivery temperature of the freezing water at a designed water delivery temperature. The invention automatically adjusts the water delivery temperature of the freezing water according to an air-conditioner load and improves the energy efficiency of a whole central air-conditioning system.
Description
technical field [0001] The invention belongs to the technical field of central air-conditioning, and in particular relates to a method for controlling the temperature of chilled water delivered by central air-conditioning. Background technique [0002] During the operation of the central air-conditioning system, the air-conditioning load changes with factors such as outdoor weather conditions, and most of the time is far less than the design load. If the chilled water delivery temperature is appropriately increased when the air-conditioning load is reduced, the operating efficiency of the chiller unit can be improved and the energy consumption of the chiller can be reduced. However, increasing the water delivery temperature may increase the power consumption of the water pump and cause additional energy consumption. Therefore, it is necessary to Considering it comprehensively, it will bring difficulties to the adjustment of the chilled water delivery temperature. Therefore,...
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IPC IPC(8): F24F11/00G05B19/04G05D23/00
Inventor 朱伟峰金正日
Owner JIANKE CONSTRUCTINO DESIGN INST SHANGHAI