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Optimal energy saving control method and device of variable air volume air conditioning ventilation system

An energy-saving control and system optimization technology, which is applied in the direction of control input involving air characteristics, space heating and ventilation control input, high-efficiency regulation technology, etc., can solve the problem of poor stability and the lack of display and analysis of the physical meaning of the variable air volume system Air-conditioning system control and energy saving issues, to improve the control effect and optimize the control effect

Inactive Publication Date: 2018-06-12
CHANGAN UNIV
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  • Description
  • Claims
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Problems solved by technology

The whole process is like a black box process, the physical meaning of each component of the variable air volume system cannot be displayed, and the control and energy saving of the air conditioning system cannot be analyzed from the perspective of the system structure
In the actual operation process of the variable air volume air conditioning system, the air volume of the system changes in real time with the change of the end load of each room, reflecting strong dynamic characteristics, and there is coupling between the control loops of the variable air volume air conditioning system, which makes the stability of the system poor during operation

Method used

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  • Optimal energy saving control method and device of variable air volume air conditioning ventilation system
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  • Optimal energy saving control method and device of variable air volume air conditioning ventilation system

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Embodiment Construction

[0056] The present invention will be further described below in conjunction with specific embodiment:

[0057] Such as figure 1 As shown, the device of the present invention includes a host computer 1, an Ethernet switch 2, a communication module 3, a programmable controller of a lower computer and an expansion module 4, a wind speed sensor 5, a fan inverter 6, a VAV-box 7 at a variable air volume terminal, and an indoor hanger. Wall Module8. Among them, the upper computer 1 is an industrial control computer, the Ethernet switch 2 is an 8-port industrial Ethernet switch, the communication module 3 is a CP243 Ethernet module, the lower computer programmable controller and the expansion module 4 are Siemens PLC S7-200CPU and EM235 expansion Module, the wind speed sensor 5 is a hot wire wind speed sensor, the variable air volume terminal VAV-box 7 is a royal single-channel single-cooling type pressure-independent variable air volume box, including a cross air volume sensor, an e...

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Abstract

The invention discloses an optimal energy saving control method and device of a variable air volume air conditioning ventilation system. A hydraulic calculating model of the variable air volume air conditioning ventilation system is built; related data is obtained through a data acquiring module; pressure drops of all loops are calculated according to mathematical models of all parts of the variable air volume air conditioning ventilation system; the most unfavorable loops in an exhaust system are found out; pressure drops of the most unfavorable loops in all the loops at this time are calculated, and are used as pressure heads of fans; the sum of air volumes needed by all air conditioning rooms and air leakage quantities is used as a set total air volume of the variable air volume air conditioning ventilation system; the pressure drops of the most unfavorable loops of the variable air volume air conditioning ventilation system and the set total air volume of the system are substitutedinto mathematical models of fan characteristic curves to calculate frequencies need by the fans at this time; and the frequencies of the fans are adjusted through frequency converters to realize optical control of the fans in the variable air volume air conditioning ventilation system. The control effect on the air volume of each terminal room in the variable air volume air conditioning ventilation system can be improved; and a certain energy saving benefit is achieved.

Description

technical field [0001] The invention relates to an optimized energy-saving control method and device for a variable air volume air conditioning system. In particular, an optimized energy-saving control method and device for a variable air volume air-conditioning system. Background technique [0002] With the development of society and the improvement of people's living standards, people pay more and more attention to the interior environment of buildings. Due to the application and development of direct digital control technology and building automation system technology in the field of HVAC, it has higher comfort. The application of the variable air volume air conditioning system with easy adjustment is gradually widespread. In the variable air volume air conditioning system control loop, the control strategy of the fan directly affects the control effect of the air volume of each terminal room, thereby affecting the thermal comfort of the room and the transmission and dis...

Claims

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Application Information

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IPC IPC(8): F24F11/64F24F11/74F24F110/10
CPCY02B30/70
Inventor 孟庆龙葛俊伶王文强
Owner CHANGAN UNIV
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