Energy-saving control method for chilled water in air-conditioning system

An energy-saving control and air-conditioning system technology, which is applied in the direction of control input involving air characteristics, space heating and ventilation control input, heating and ventilation control system, etc., can solve energy waste, complex control logic, and increased work of the rear humidification system Load and other problems, to achieve the effect of reducing the humidification load

Active Publication Date: 2020-12-29
HONGTA TOBACCO GRP
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Central air-conditioning involves the use of various energy carriers such as chilled water, steam, and solar hot water, and its control logic is also very complicated. Although the central air-conditioning control system has become more mature and perfect in recent years, there is still much room for improvement
Traditional control methods have strict requirements on the pressure of steam and the temperature of chilled water. However, since refrigeration and dehumidification coexist, in actual use, it will be found that there are contradictions in the use of chilled water. For example, the air conditioner is in the process of refrigeration and humidification. In addition, because refrigeration requires the use of chilled water, if the temperature of the chilled water is lower than the dew point temperature of the mixed air, then dehumidification is also going on while cooling, which will increase the workload of the humidification system in the latter stage, and also cause certain damage. Energy waste

Method used

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  • Energy-saving control method for chilled water in air-conditioning system
  • Energy-saving control method for chilled water in air-conditioning system
  • Energy-saving control method for chilled water in air-conditioning system

Examples

Experimental program
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Effect test

Embodiment 1

[0045] The present invention mainly adjusts correspondingly according to the different weights of chilled water used in different working conditions. like figure 1Shown is a flow chart of the energy-saving control method for chilled water in the air-conditioning system in the present invention. Embodiment 1 of the present invention provides an energy-saving control method for chilled water in an air-conditioning system, which includes the following steps:

[0046] Step S1, the air conditioner collects the mixed air temperature T 1 and mixed air relative humidity %RH 1 ;

[0047] Step S2, through the mixed air temperature T 1 and mixed air relative humidity %RH 1 Get the mixed air dew point temperature T 2 ;

[0048] Step S3, judging the operating condition of the air conditioner, if the operating condition is a dehumidification condition, proceed to step S4; if the operating condition is a humidification condition, then proceed to step S5;

[0049] Step S4, set the chi...

Embodiment 2

[0064] The difference between this embodiment and Embodiment 1 is that this embodiment provides an energy-saving control method for chilled water in an air-conditioning system, and the steps S1 and S2 in Embodiment 1 are replaced by the following steps:

[0065] Step S31, using a dew point meter to measure the dew point temperature T of the mixed air 2 .

[0066] The dew point meter is a mirror type dew point meter or an electrolytic dew point meter or a crystal oscillator type dew point meter or an infrared dew point meter or an electric sensor type dew point.

[0067] The mirror dew point meter is made according to the characteristics that gases with different moisture contents will condense on the mirror surface at different temperatures. In addition, photoelectric detection technology is used to detect the dew layer and measure the temperature at the time of dew condensation, and directly display the dew point. Mirror refrigeration methods include: semiconductor refriger...

Embodiment 3

[0074] The difference between this embodiment and Embodiment 1 is that this embodiment provides an energy-saving control method for chilled water in an air-conditioning system, which includes a dry-wet bulb thermometer and a barometer, and the dry-wet bulb thermometer is used to measure the dry-bulb temperature and the wet-bulb temperature . A barometer is used to measure air pressure. This embodiment provides an energy-saving control method for chilled water in an air-conditioning system, which further includes the following steps instead of steps S1 and S2 in Embodiment 1:

[0075] Step S51, measuring the dry bulb temperature t and the wet bulb temperature t by using a wet and dry bulb thermometer w , using a barometer to measure the air pressure P h ;

[0076] Step S52, through the dry and wet bulb temperature difference and the air pressure P h To calculate the water vapor pressure F in the air, the calculation formula is:

[0077] F=E tw -AP(t-t w );

[0078] In t...

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Abstract

The invention relates to the technical field of air conditioning, in particular to an energy-saving control method for chilled water of an air conditioner system. According to the control method, chilled water supply temperature is set through the mixed air dew point temperature and the operating working condition of an air conditioner; when the air conditioner system is in a dehumidification working condition, the chilled water supply temperature is lower than the mixed air dew point temperature by 2 DEG C; and when the air conditioner system is in the humidification working condition, the chilled water supply temperature is the same as the mixed air dew point temperature. Compared with the prior art, the control method has the beneficial effects that mixed air can be prevented from beingexcessively dehumidified during refrigeration, then the humidification load of the rear section can be reduced, and the effects of saving energy and reducing consumption are achieved.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to an energy-saving control method for chilled water in an air-conditioning system. Background technique [0002] With the continuous development of society and the continuous improvement of technical level, there are more and more environments where central air conditioners are used in industrial production. Central air-conditioning involves the use of various energy carriers such as chilled water, steam, and solar hot water, and its control logic is also very complicated. Although the central air-conditioning control system has become more mature and perfect in recent years, there is still much room for improvement. Traditional control methods have strict requirements on the pressure of steam and the temperature of chilled water. However, since refrigeration and dehumidification coexist, in actual use, it will be found that there are contradictions in the use of chilled w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/70F24F11/63F24F110/10F24F110/20F24F110/40
CPCF24F11/63F24F11/70F24F2110/10F24F2110/20F24F2110/40
Inventor 罗鹏张前明熊新社李灿李建华曹劲松任雪梅王刚杨玉英
Owner HONGTA TOBACCO GRP
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