Control method and control device of heat-source tower-coupled heat pump heating system

Abstract

The invention discloses a control method and a control device of a heat-source tower-coupled heat pump heating system, and the control method comprises the following steps: using a central control unit to analyze the specific gravity value of water solution of a heat source tower, analyze the relationship between the dry bulb temperature value of the air at an air inlet of the heat source tower and the dew-point temperature value of the air at the air inlet of the heat source tower, analyze the relationship between the dew-point temperature value of the air at the air inlet of the heat source tower and the temperature value of the water solution at a liquid inlet of the heat source tower and analyze the relationship between the water vapor partial pressure value of the air at the air inlet of the heat source tower and the water vapor partial pressure value on the solution surface at the liquid inlet of the heat source tower under the dynamic running condition of the system, using the central control unit to transmit control information to a frequency conversion controller of a motor of an automatic solute adding device, the frequency conversion controller of a fan of the heat source tower and the frequency conversion controller of a circulation pump and carrying out dynamic regulation and control on the system. The control method and the control device of the heat-source tower-coupled heat pump heating system have simple structure and low cost, and can realize the high-efficient, stable and energy-saving operation of the system to the greatest extent.

Description

technical field [0001] The invention belongs to the application field of a central air-conditioning heat pump system and its automatic control, and relates to a control method and a control device for a heat source tower coupling heat pump heating system. technical background [0002] In recent years, the use of heat source tower (energy) cold and heat source system has a certain effect on energy saving and environmental protection. 中国专利ZL200620073647.8、ZL200720025071.2、ZL200720046725.X、ZL200820154042.0、ZL200820154041.6、ZL200820154043.5、ZL20820022519.X、ZL200820053216.4均提出了热源(能源)塔采用空气与水溶液(载冷剂) The method of heat exchange and extraction of low-grade heat in the air for heat pump heating has high heat exchange efficiency, energy saving and environmental protection, low unit load, low energy consumption, and is not limited by regional geological and environmental conditions, so it has a wide range of applications. [0003] However, in the actual operation of the heat source towe...

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Problems solved by technology

[0004] At present, domestic targeted research on heat source tower coupled heat pump heating systems is still in its infancy, there is still a lack of relevant regulations and standards, and a lot of basic data and experimental data on actual operation cannot be provided, which makes many buildings under different climate conditions The design of the heating system deviates from the actual operation, which wastes a lot of energy and causes diseases of the related system

However, the variable operating mode that generally adopts artificial clearance to adjust the frequency of the water pump and the heat source tower fan cannot reliably combine the actual operating conditions of the system for energy-saving, high-efficiency, and safe adjustments.

Obviously, there are obvious defects in the conventional control mode, which will lead to a series of problems such as low heating operation efficiency, poor stability, and weak safety performance of the heat source tower.

In order to achieve the best operation and energy saving of the system, it is difficult to solve the problem locally. It is necessary to consider and control all aspects of the system in a unified way, so as to realize the stable and energy-saving operation of the system.

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