People living in the present are becoming more and more acceptable for the application of ground source heat pumps. However, the use and acceptance of ground source heat pumps does not indicate that people have a good understanding of ground source heat pumps. Nowadays, there are more and more people using ground source heat pumps. However, there are many people who can't explain the treatment of groundwater in the design of white ground source heat pump. Because of this, although some people are using ground source. Heat pump, however, people are not very selective about it.
After the ground source water passes through the heat pump unit, it only exchanges heat, and the water quality hardly changes. After recharging to the stratum or re-discharging into the surface water body, the statement that the original water source will not be polluted should be cautious.
For example, in Guangdong, Guangzhou, Shenzhen and other places, the climatic conditions are long in the summer, and the cooling load is relatively large, while the winter heating demand is small, the cooling load is much larger than the heat load, and the cooling and heating load is very uneven. There is not enough heating needs to offset the summer cold load and achieve a cold and heat balance. It is not recommended to use ground source heat pump units for cold and heat sources.
The ground source heat pump air conditioning system is still in the primary stage in China. It needs to be adapted to local conditions, overall planning, energy characteristics and hydrogeological conditions, and gradually promote the ground source heat pump air conditioning technology, so as to help optimize the energy structure, in the premise of environmental protection. Next, improve energy efficiency.
Groundwater treatment
The groundwater quality in different areas is different. In the actual project, the local groundwater quality should be tested, and the groundwater that does not meet the standard should be treated accordingly.
When the groundwater contains a high amount of sand, it should be treated with a filter or a sand removal device. At present, a cyclone type sand remover that has a small volume, high sand removal efficiency, and can remove sand in water without interruption of water supply is generally used.
The type and number of the desander should be selected according to the treatment flow. Some water sources have a large turbidity, which is likely to cause blockage of the tube filter and aquifer during recharge, which affects the stability and service life of the water supply system. For water sources with high turbidity, a water purifier can be installed for filtration. When the iron content in the water is greater than 0.3mg/L, the iron removal equipment should be installed in the water system.
The iron content in groundwater in China generally exceeds the allowable value, so it is necessary to remove iron before use. The ion bar anti-scaler is a new type of advanced water treatment equipment. It has anti-scaling, descaling, descaling, anti-corrosion and other functions, low power consumption and long service life. This equipment is installed horizontally on the pipeline at the inlet of the heat pump unit and is simple to install, eliminating the need for additional valves and bypass lines.
Some water sources have a higher degree of mineralization and are more corrosive to metals. Direct access to the unit will reduce the service life of the unit. If the water treatment is used to reduce the degree of mineralization, the cost is very high.
The intermediate heat exchange method of the plate heat exchanger is usually adopted to isolate the water source water from the unit, so that the unit can completely avoid the corrosive effect of the source water. For different salinity groundwater, different heat exchange methods and equipment should be used.
Concerned about surprises
Label: Groundwater treatment Ground source heat pump design
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