The working principle of screw type water source heat pump unit is to transfer the heat in the building to the water source in summer; In winter, energy is extracted from a relatively constant temperature water source, and the heat pump principle is used to raise the temperature through air or water as a refrigerant before delivering it to the building. Usually, water source heat pumps consume 1kW of energy, and users can obtain more than 4kW of heat or cold. Water source heat pumps overcome the shortcomings of frost formation in outdoor heat exchangers of air source heat pumps in winter, and have high operational reliability and heating efficiency. In recent years, they have been widely used in China. Advantages of water (ground) source heat pump units

1. Efficient and energy-saving

The screw type water source heat pump unit is currently the refrigeration and heating method with the highest COP value in air conditioning systems. The theoretical calculation can reach 7, and the actual operation is 4-6.

The available water temperature for screw type water source heat pump units is 12-22 ℃ in winter, which is higher than the ambient air temperature. Therefore, the evaporation temperature of the heat pump cycle is increased, and the energy efficiency ratio is also improved. In summer, the water temperature ranges from 18 to 35 ℃, which is lower than the ambient air temperature. Therefore, the condensation temperature of the refrigeration system decreases, resulting in better cooling effects than air-cooled and tower cooling systems, thereby improving the operational efficiency of the unit. The water source heat pump consumes 1kW. h of electricity, and users can obtain 4.3-5.0kW. h of heat or 5.4-6.2kW. h of cooling. Compared with air source heat pumps, its operating efficiency is 20-60% higher, and its operating cost is only 40-60% of that of ordinary central air conditioning.

2. Belonging to renewable energy utilization technology

The screw type water source heat pump unit is a heating and air conditioning system that utilizes the solar energy resources stored in the Earth's water bodies as cold and heat sources for energy conversion. The available water bodies include groundwater or rivers, surface rivers and lakes, and oceans. The surface soil and water bodies are not only huge solar collectors, collecting 47% of solar radiation energy, which is more than 500 times the energy used by humans every year (underground water bodies indirectly receive solar radiation energy through soil), but also a huge dynamic energy balance system. The surface soil and water bodies naturally maintain a relative balance of energy reception and dissipation. This makes it possible to utilize the almost infinite solar or ground energy stored within it. So, water source heat pumps utilize a clean and renewable energy technology.

Technical characteristics of screw water source heat pump unit

1. The screw unit adopts the internationally advanced 5:6 asymmetric twin screw heat pump special compressor. Through more than 20 years of practice, it has been proved that the product has many advantages such as stable performance, high efficiency and energy saving, long service life, extremely low failure rate, and is widely applicable to the environmental conditions in Chinese Mainland;

2. The unit adopts Siemens control system. Adopting advanced PLC control technology, it can accept programming and has complete communication functions, making it easy to interface with building intelligent control systems. Electrical system: The unit uses international brands such as Siemens and Schneider electrical components, and adopts a waterproof control cabinet.

3. Human machine interface: The unit adopts Siemens touch LCD display screen, with Chinese and English human-machine interface, simple operation program, one click start, and automatic operation.

4. Unit enclosure: The unit adopts an integrated design with a compact and simple structure. The enclosure structural components are all electrostatically phosphated and sprayed with automatic spraying equipment, which has strong corrosion resistance. It is equipped with a waterproof control cabinet to ensure that the unit can be placed outdoors for a long time without fading or corrosion;

5. The unit has a complete protection system, with thermal protection module and power protection module inside the compressor. The whole machine is equipped with water flow protection, antifreeze protection, high voltage protection, low voltage protection, overload protection, phase loss protection, reverse phase protection, power voltage protection, etc. All unit faults are displayed in both Chinese and English on the operation screen, effectively avoiding damage to the unit under harsh working conditions, protecting the safe operation of the unit, and extending its service life.

6. The refrigerant circulation system of the unit needs to be equipped with multiple angle valves for daily maintenance to minimize refrigerant loss during unit maintenance and effectively reduce user unit maintenance costs.