Problems needing attention in well drilling:
It is better to do thermal response experiments by drilling experimental wells and get more accurate data by professional software calculation.
1. According to the contents of the hydro geological investigation report and water resources demonstration report of the test well, the water output (related to the thickness of aquifer, the size of wellhead slightly affected), recharge capacity, etc.
2. Calculate the heat and cold load according to the area of heating or refrigeration, determine the type and quantity of water source heat pump units and water demand;
3. Consider the location of wells and the impact of climate. (For example, there are dams nearby, the length of the rainy season has an impact.) First calculate the heat according to the load, absorb the heat. In thermal response testing, if unconditional testing is done, it can be estimated according to experience that buried pipe can be divided into single U, double U, casing and other forms, which are generally customized products. There is not much work done on the site, nor is it economical, so there is no problem of bottom hole connection.
4. If you want to do ground-source heat pump, you have to take geological exploration to understand the underground soil temperature. Generally, the cost of ground-source heat pump is much higher than that of water-source heat pump. If you want to use water-source heat pump, it depends on how many tons of groundwater can be produced per well in your project, but if you want to use water-source heat pump, you have to consider the problem of recharge. The problem of source heat pump recharge is the premise of the good operation of water source heat pump. If the backup well produces 200 tons of water per hour, but the pressure of recharge is too high to be able to recharge 200 tons of water, it must be divided into 2 wells or 3 wells to distribute and recharge water from the operation of water source heat pump and recharge water at the same time. The closed system of Ground Source Heat Pump will not affect the water, which circulates in the buried pipe and can not reach the outside.
