As a new type of cooling and heating method, water source heat pump should be quite mature and problem free from a technical perspective, especially from the perspective of heat pump units. However, considering China's national conditions and the promotion and application of water source heat pump refrigeration and heating as a whole system, there are still some problems:

1. Policy on the use of water sources - Pipeline pumps

At present, in order to protect limited water resources, China has formulated the Water Law of the People's Republic of China, and various cities have also formulated their own Urban Water Management Regulations. These policies all emphasize water approval and water fees. However, there are no requirements for similar water source heat pump technologies in the approval standards, so water source heat pumps are easily limited by water usage indicators. Even if the water use approval is passed, due to the fact that some places charge for the extraction and discharge of water sources twice, and the charging standards are not unified nationwide, the result may lead to high water fees, resulting in insufficient energy-saving costs for the operation of water source heat pumps and a decrease in the economic efficiency of water source heat pumps.

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Therefore, the promotion of water source heat pumps requires the government to consider sustainable development, integrate energy, environmental protection, and resource considerations, adjust policies for the use of water sources in water source heat pumps, and redefine how water sources are managed and charged in order to promote their large-scale development.

2. Exploration and extraction technology and cost of water sources

In China, the detection and extraction technology of water sources, especially urban water sources, should be improved. One of the prerequisites for the application of water source heat pumps is to understand the local water source situation. In the early stage of using water source heat pumps, it is necessary to conduct on-site investigations on the water source situation, whether there is water in the groundwater, whether the water volume is sufficient, and whether the site is suitable for drilling wells and reinjection. The improvement of detection and mining technology and the reduction of costs will promote the better application of water source heat pump units. sewage pump

3. Groundwater recharge technology

If a water source heat pump uses groundwater, it must consider the recharge of the water source. For the recharge technology, it must be considered in conjunction with the local geological conditions to determine the recharge method. Our understanding of the geological structures in different regions is still limited, which also restricts the promotion and use of water source heat pump units.

4. Design of the overall system for chemical pumps

As a system, energy conservation of water source heat pump system must be considered from various aspects. If the water source heat pump unit can provide more energy with smaller water flow, but the system design does not select or control energy consuming equipment such as water pumps properly, it will also reduce the energy saving effect of the system. Similarly, if the unit provides high water temperature but the end of the designed air conditioning system is not taken into account, it may also result in a decrease in the overall system performance or an increase in the initial investment of the entire system. Therefore, the promotion and application of water source heat pumps require more people from various professions and fields to work together and cooperate, participating in government policies, host design and manufacturing, system design and operation management, and other aspects.