A fresh air treatment control method and system based on air enthalpy
A technology of fresh air treatment and control method, which is applied in the direction of heating and ventilation control system, control input related to air characteristics, space heating and ventilation control input, etc. Monitoring indoor and outdoor air enthalpy and other issues
Active Publication Date: 2019-07-26
SHENZHEN DAS INTELLITECH CO LTD
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[0003] The technical problem to be solved by the present invention is to provide a kind of Fresh air treatment control method and system based on air enthalpy
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[0047] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0048] The fresh air treatment control method and system based on the air enthalpy value of the present invention are applicable to the field of central air-conditioning energy saving. By monitoring the indoor and outdoor air enthalpy values in real time, the opening ratio of the chilled water pipeline valve of the fresh air unit is controlled in real time, thereby realizing the control of the chilled water flow rate. Control, adjust the air supply volume in time, reduce unnecessary air volume delivery, and finally achieve the purpose of energy saving for the central air-conditioning fresh air system under the premise of ensuring indoor air quality.
[0049] Such as figure 1 Shown is a schematic flow chart of the fresh air treatment control me...
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The invention relates to a fresh air processing control method and system based on an air enthalpy value. The method comprises following steps: S1, an outdoor air enthalpy value and temperature of a fresh air handling unit are collected, and calculation is performed according to a calculation formula of the air enthalpy value to obtain a pre-sent air enthalpy value of air which is pre-sent to indoor space; S2, a thermal balance equation is established according to the collected outdoor air enthalpy value, the pre-sent air enthalpy value obtained through calculation and the energy conservation law; chilled water demand of the fresh air handling unit is calculated according to the thermal balance equation, an opening proportion of a chilled water pipe valve of the fresh air handling unit is controlled according to the calculated chilled water demand of the fresh air handling unit, so that the water flow of the chilled water is adjusted; S4, the steps S1-S3 are repeated every T minutes, wherein T is a positive number. According to the method and the system, real-time control of the chilled water flow is realized by monitoring the air enthalpy value and supply and return water temperature of the chilled water of the fresh air handling unit in real time and adopting the energy conservation law, and energy is saved accordingly.
Description
technical field [0001] The present invention relates to the technical field of central air-conditioning, and more specifically, relates to a fresh air treatment control method and system based on air enthalpy. Background technique [0002] In my country, the total energy consumption of buildings in 2014 exceeded 1.25 billion tons of standard coal, accounting for 30% of the total energy consumption of the society. The energy consumption of central air-conditioning accounts for 65% of the total energy consumption of the building, of which the energy consumption of the air-conditioning machine room accounts for about 70% of the energy consumption of the air-conditioning system. The introduction of outdoor fresh air into the air conditioning system is the key to ensuring good indoor air quality. When the enthalpy value and temperature of the outdoor air are higher than the enthalpy value and temperature of the indoor air in summer, the air conditioning system must consume certa...
Claims
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IPC IPC(8): F24F11/64F24F11/72
CPCF24F11/30F24F11/83F24F11/84F24F2110/00F24F2140/20
Inventor 薛雪刚文杰赵阳孙雪
Owner SHENZHEN DAS INTELLITECH CO LTD