Control method for energy saving of heating ventilating and air conditioning hydraulic pipe network in transmission and distribution (HVAC)

Abstract

The invention relates to a control method of an air conditioning system, aiming at providing a control method for energy saving of a heating ventilating and air conditioning hydraulic pipe network in transmission and distribution (HVAC). In the method, an intelligent power controller and a PID controller measure the temperature according to a backwater temperature sensor so as to determine a cooling mode or a heating mode, the PID controller conducts PID algorithm by comparing a set value of a branch backwater temperature with a measured value of the branch backwater temperature, and outputs aunit electronic opening, and a control valve adjusts the opening on the basis of the electronic opening; and the intelligent power controller compares the set value of the branch backwater temperature with the measured value of the branch backwater temperature in different modes so as to conduct PID algorithm and output unit control signals, and a frequency transformator adjusts frequency according to the control signals. In method, the backwater temperature is taken as a control target so as to lead the control to be more direct, and the misadjustment of the pipe network system can not be caused by fluctuation thereof; the branch backwater temperature is taken as the basis of adjusting power instead of the backwater temperature of a master network, the power adjustment is more accurate and sensitive, and the energy consumption is smaller.

Description

technical field [0001] The invention relates to an air-conditioning system control method, in particular to a control method for energy-saving control of HVAC hydraulic pipe network transmission and distribution. Background technique [0002] At present, my country's energy consumption indicators are far below the world's advanced level, and there are widespread phenomena such as high energy consumption and serious waste. How to implement energy-saving and emission-reduction technologies has increasingly attracted people's attention, especially in northern my country, where heating energy consumption is 3-5 times that of developed countries under the same climatic conditions, not only because of the general lack of effective metering devices in the process of user use , heating charges are generally calculated according to the room area, resulting in weak awareness of energy conservation among users and serious energy waste, which violates the principle of fairness and justic...

AI Technical Summary

Problems solved by technology

Although such a control scheme has played a great role in energy saving, it still ignores some key issues. The static balance of the pipe network branches is relatively difficult, and it is easy to cause system imbalance in system fluctuations. This problem exists even in dynamic balance. ; The frequency of the water pump and the power of the refrigeration equipment are adjusted according to the total return water pipeline, which ignores the difference between the return water temperature of the branch circuit and the total return water temperature of the pipe network, as well as the difference in the return water temperature between each branch circuit

[0003] At present, there is no similar HVAC hydraulic pipe network transmission and distribution energy-saving control method. This control method can be used to control the pipeline heating and cooling system in a concise, efficient and optimized manner.

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