Compared with conventional air conditioning technology, water source heat pump has the following advantages:
1, efficient energy saving
The water source heat pump is the cooling and heating method with the highest energy efficiency ratio (COP value) in the air conditioning system. The theoretical calculation can reach 7 and the actual operation is 4-6.
The water body temperature that can be utilized by the water source heat pump unit is 12-22 ° C in winter, and the water body temperature is higher than the ambient air temperature, so the evaporation temperature of the heat pump cycle is increased, and the energy efficiency ratio is also improved. In summer, the water body temperature is 18-35 ° C, and the water body temperature is lower than the ambient air temperature, so the cooling condensation temperature is lowered, so that the cooling effect is better than the air-cooled type and the cooling tower type, thereby improving the operating efficiency of the unit. The water source heat pump consumes 1 kW.h of electricity, and the user can obtain 4.3 to 5.0 kW.h of heat or 5.4 to 6.2 kW.h of cooling capacity. Compared with the air source heat pump, its operating efficiency is 20 to 60% higher, and the operating cost is only 40 to 60% of the ordinary central air conditioner.
2. Renewable energy
The water source heat pump is a heating and air-conditioning system that uses solar energy stored in the earth's water body as a heat source and uses low-temperature water that is naturally radiated from the earth's water body as a cold source to perform energy conversion. Among the water bodies that can be used, include groundwater or rivers, rivers and lakes in parts of the earth's surface, and the ocean. The surface soil and water body are not only a huge solar collector, but also collect 47% of the solar radiation energy, which is more than 500 times of the energy used by humans every year (the underground water body receives the solar radiation energy indirectly through the soil), and A huge dynamic energy balance system, the soil and water on the surface naturally maintain a relative balance of energy acceptance and divergence. This makes it possible to utilize near-infinite solar or ground energy stored therein. Therefore, the water source heat pump utilizes a technology of clean renewable energy.
3. Water saving and land saving
The surface water is used as a source of cold and heat, releasing heat or absorbing heat, not consuming water resources, and not polluting it; eliminating the need for boiler rooms and auxiliary coal yards, oil storage rooms, cooling towers, etc. Less than the conventional air conditioning system, saving building space, but also conducive to the aesthetics of the building.
4. Significant environmental benefits
When the water source heat pump unit supplies heat, it saves the boiler room system such as coal, gas and oil, and has no combustion process, avoiding pollution such as smoke exhaustion and sewage discharge; when cooling, the cooling water tower is omitted, and the noise of the cooling tower is avoided. Mold contamination and water consumption. Therefore, the water source heat pump unit operates without any pollution, no combustion, no smoke, no waste residue, waste water, waste gas and smoke, no urban heat island effect, and is very friendly to the environment. It is an ideal green product.
5, a multi-purpose machine, a wide range of applications
The water source heat pump system can be used for heating and air conditioning, and can also be used for domestic hot water. One machine can replace two sets of devices or systems of the original boiler plus air conditioner. Especially for buildings with both heating and cooling requirements, water source heat pumps have obvious advantages. Not only does it save a lot of energy, but it also meets the requirements of heating and cooling with a single set of equipment, reducing the initial investment in equipment. Its total investment is only 60% of the traditional air conditioning system, and the installation is easy, the installation workload is less than the traditional air conditioning system, the installation period is short, and the installation is easy.
The water source heat pump can be applied to hotels, shopping malls, office buildings, schools and other buildings. The small water source heat pump is more suitable for heating and cooling of villas and residential quarters.
6, stable and reliable operation, easy maintenance
The temperature of the water body is relatively stable all year round, and its fluctuation range is far less than the change of air. The constant temperature of the water body makes the heat pump unit run more reliable and stable, and also ensures the high efficiency and economy of the system. Control, high degree of automation. Because the system is simple, the unit components are small, and the operation is stable, the maintenance cost is low and the service life is long.
7. In line with national policies and obtain policy support
The state attaches great importance to the development and utilization of renewable energy. The Law of the People's Republic of China on Renewable Energy has been implemented since January 1, 2006. At the same time, it has been vigorously developed in the Outline of the National Medium- and Long-Term Science and Technology Development Plan. And the application of new energy and renewable energy as a priority in the field of energy. From the height of national legislation and development strategy, the development and application of renewable energy will be strongly promoted.
According to the policy of the Ministry of Construction, all buildings that use water source heat pump air-conditioning technology can obtain government policy support by reporting to the local construction committee, and reduce the construction supporting costs by 140-200 yuan/m2.
The advantages compared to boiler (electric, fuel) and air source heat pump heating systems are:
Water source heat pumps have significant advantages over boiler (electric, fuel) and air source heat pump heating systems. Boiler heating can only convert 90%~98% of electric energy or 70%~90% of fuel internal energy into heat for users to use. Therefore, ground source heat pump can save more than two-thirds of electric energy than electric boiler heating. The fuel boiler saves more than half of the energy; because the heat source temperature of the water source heat pump is stable throughout the year, generally 10 to 25 ° C, its refrigeration and heating coefficient can reach 3.5 to 4.4, compared with the traditional air source heat pump. It is about 40% higher, and its operating cost is 50% to 60% of that of ordinary central air conditioners. Therefore, in the past ten years, water source heat pump air conditioning systems have achieved rapid development in North America, Central and Northern Europe, especially in the past five years, China's water source heat pump market has become increasingly active, making this technology quite extensive. Application, become an effective heating and cooling air conditioning technology.
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