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How to Improve the Performance of Air Source Heat Pump System ?

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How to Improve the Performance of Air Source Heat Pump System ?

Issue Time:2022/01/17
the specific methods to improve the performance of air-source heat pump
With the increasing energy consumption, energy-saving and consumption reduction have become one of the effective means to alleviate energy shortages. These products mainly consume high-grade energy such as electricity and natural gas. Therefore, air source heat pump systems have been widely used in various heating equipment and systems in recent years due to their energy-saving, environmental protection, safety, and reliability characteristics.

However, it should be noted that the temperature and humidity of the operating environment of the air source heat pump system change greatly, and it is always in a state of variable working conditions, and its performance is limited. The following are the specific methods to improve the performance of air-source heat pump for everyone.

1. Design multi-modal process control

The research shows that the ambient temperature has a significant impact on the performance coefficient of the air source heat pump system, and the operating performance of the system is quite good when the ambient temperature is about 30 ℃.

If a single control mode is used, the performance coefficient of the air source heat pump system is not high most of the time due to changes in the environment.

In order to give full play to the energy-saving advantages of the air source heat pump system, when designing the air source heat pump control system, multi-modes such as noon mode, winter energy-saving mode, and valley power mode can be designed according to different user needs, typical seasonal changes, and daily temperature changes. The process control system, for users to choose, can effectively improve the operational performance of the air source heat pump system throughout the year.

2. Optimize the defrosting control design

At present, from the actual operation effect of the air source heat pump system, the performance of the unit is not ideal when operating in areas with low temperature and relatively high relative humidity. It must be defrosted in time using an effective defrosting method.

At present, the defrosting method often used in air source heat pumps is reverse cycle hot gas defrosting, and the automatic defrosting control method is the key to affecting the defrosting effect. At present, there are many automatic defrosting control methods, and the more advanced and practical one is the fuzzy intelligent control defrosting method.

The fuzzy intelligent control defrosting method introduces the fuzzy control technology into the defrosting control of the air source heat pump system. The entire defrosting control system consists of data acquisition and AII conversion, input quantity modeling, fuzzy reasoning, defrosting control, defrosting monitoring, and control rules.

Through the corresponding analysis of the defrosting process, the defrosting monitoring and control rules are revised, so that the defrosting control can automatically adapt to the changes in the working environment of the unit and meet the requirements of intelligent defrosting.

3. Reasonable configuration of throttling device

The performance of air source heat pump systems varies greatly in various environments. When the ambient temperature is high, thick and short capillaries perform better; when the ambient temperature is low, thin and long capillaries perform better.

At an ambient temperature of 35 ℃, the performance of the short capillary system was 21% higher than that of the long capillary; while at 15 ℃, the performance of the long capillary system was 3% higher than that of the short capillary.

To solve this problem, the improvement method of the air source heat pump system is to use a double capillary. But even with double capillaries, the inner diameter and length of one of them are constant, so the pressure difference before and after it will not change greatly with the water temperature, that is, the refrigeration capacity of the same capillary is almost unchanged during operation.

However, the hot water side of the air source heat pump system is constantly heating up, which requires the working fluid flow to increase accordingly to meet the heating demand. Therefore, replacing the double capillary with a thermal expansion valve is a more reasonable configuration to stabilize the system performance.

In order to further improve the matching performance and reliability of the system, an electronic expansion valve with a wider adjustment range and more sensitive response should be used. Although the cost is higher, it can significantly improve the stability of the system and improve the operating performance.

When running the air source heat pump, if we can take the above three measures at the same time, the performance of the air source heat pump will be greatly improved.

SUOHER is an experienced heat pump manufacturer with a professional quality inspection system and a comprehensive management team. We put the needs of customers first, and continue to develop new technologies and manufacturing processes. Whether it is product manufacturing or export, we will carry out comprehensive quality control. If you want to buy our air source heat pumps, please contact us immediately!

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