Technology of heat flow direction for heat transfer oil pump and heat pump

Thermal oil pump heat pump is a technology that flows heat from a low-level heat source to a high-level heat source under the drag of high-level energy. Thermal oil pump heat pump utilizes low-energy heat pump technology to save fuel, utilize energy, and reduce environmental pollution, as a way to balance energy conservation and environmental protection. It can convert low-grade thermal energy that cannot be directly utilized (such as air, soil, water, solar energy, industrial waste heat, etc.) into usable high-level energy, thereby achieving the goal of saving some high-level energy (coal, oil, gas, electricity, etc.). The thermal oil pump heat pump adopts a ground source heat pump system. Due to the soil temperature being closer to indoor temperature than outdoor air temperature, ground source heat pumps can have higher efficiency and better performance than air source heat pumps. The efficiency of a thermal oil pump heat pump is related to the temperature difference between the indoor and outdoor environments of the building. The smaller the temperature difference, the higher the efficiency of the heat pump. Studies have shown that from the perspective of defrosting during winter operation of heat pump units, the use of air source heat pumps is not only related to outdoor temperature, but also closely related to the relative humidity of the outdoor atmosphere, which limits its scope of use. There are studies showing that compared with the energy consumption of regional boiler rooms, the energy consumption of a heat pump station with the same capacity of heat transfer oil pump: when using river water (5-6.6 ℃) as a low-level heat source, the annual coal saving rate is 12.68-14.08%; When using seawater (12-13.6 ℃) as a low-level heat source, the annual coal saving rate is 21.59-39; When using industrial wastewater (18-20 ℃) as a low-level heat source, the annual coal saving rate is 39-39. In addition, because the heat capacity of water with the same volume flow rate is 3500 times that of air, the heat exchange effect between water and refrigerant is much better than the convective heat exchange between air and refrigerant. Therefore, the heat exchange coil of the heat transfer oil pump heat pump is much smaller than that of the air source heat pump, and the components of the ground source heat pump system are fewer, which can reduce its operating costs.