Principle and Applications of Air Source Heat Pump
Air thermal energy in the air is a form of renewable energy. Air source heat pump is the main utilization method of air heat. Air source heat pump is an energy-saving equipment and part of the new energy industry. The development of the air source heat pump industry will help achieve energy conservation and emission reduction, and increase the utilization rate of renewable energy. It has broad potential in construction applications and industrial and agricultural production.
Air source heat pump hot water unit is an effective way to solve our residents’ lives and heating and hot water supply. The vigorous development and utilization of air heat energy and the development of the air source heat pump industry are of great significance for implementing the scientific development concept, building a resource-saving and environment-friendly society, achieving sustainable development, and increasing green GDP.
1) Air Source Heat Pump
The most common form of air heat utilization is air source heat pump technology. The Heat Pump technology uses the principle of reverse Carnot cycle to drive the heat pump unit with a small amount of energy. The working medium in the heat pump system undergoes a phase change cycle to absorb low-temperature heat (such as air, soil, and water) in the natural environment, compress and heat up An energy-saving technology used later. Heat pump systems can be divided into water source, ground source, and air source heat pumps according to different energy sources.
The heat source is air, which is called air source heat pump, which specifically includes “Air to air heat pump” and “Air to water heat pump”. Compared with water source and ground source heat pump, air source heat pump has the advantages of easy installation and use, simple and reliable equipment, as long as it can be installed in a place with air circulation, without drilling wells and laying pipes. Therefore, air source heat pumps are widely used.
Since the heat pump system is an energy transportation system rather than an energy conversion system, it usually uses a portion of energy to drive the heat pump system, which can transport three or four times the energy for use. Therefore, the air source heat pump system is more energy-efficient than general thermal equipment. The air source (air energy) heat pump water heater using air source heat pump technology can generate three to four kilowatts of heat by consuming one kilowatt-hour of electricity, and its energy efficiency is 3 to 4 times that of electric water heaters, and has excellent energy saving and emission reduction effects.
The economic comparison between air source heat pump water heater and other hot water production methods is shown in the following table 1-2. Energy consumption comparison between air source heat pump water heater (machine) and electric water heater. Compared with pure electric water heaters, air energy heat pump water heaters can save more than 70% of energy.
The hot water produced by the air source heat pump water heater (machine) can be used to supply domestic hot water to meet the daily needs of bathing, washing vegetables, and hand washing; it can also be connected to the heating system to meet the needs of building heating. Since the water temperature produced by the air source heat pump hot water equipment is generally low, when it is used for building heating, it is mostly connected to the floor heating and the end of the fan coil.
The composite system has better applicability or higher energy efficiency. The more common air source heat pump hot water equipment is a combination of electric heating. Electric heating is used to make up for the shortcomings of air source heat pump equipment in a low temperature environment, which can improve the applicability of air source heat pump hot water products.
Another common is the combination of air source heat pump hot water equipment and solar hot water equipment, which is more commonly used in commercial occasions. Air source heat pump hot water equipment is used as a supplement to pemanas air mandi listrik to replace electric auxiliary heating. There are also many researches and products for the combination of gas and air source heat pumps.
2) Product Range and Application
The narrow scope of air source heat pumps includes heat pump water heaters with single heating and industrial heat pump products. These products can be used to heat buildings, produce domestic hot water, and can also be used in industrial and agricultural production to achieve drying or provide process heating. These products realize the effective use of renewable energy.
Compared with other thermal equipment, they have significant energy-saving effects, and there is no pollution discharge during operation. They are green equipment that is worthy of vigorous development and promotion. This report mainly involves products in the narrow scope of air source heat pumps, namely air source heat pump water heater products, including domestic hot water and heating applications.
The broad scope of air source heat pumps also includes heat pump air-conditioning products that also have heat pump functions. The air source heat pump can share a system with refrigeration and air conditioning, and the refrigeration function can be realized by adjusting the flow direction of the refrigerant. A large number of heat pump air-conditioning products have both cooling and heating functions.
3) International Development of Air Source Heat Pumps
Japan was the first country to popularize heat pump applications. After the first oil crisis, starting from the basic goal of energy security, Japan took energy conservation as a basic national policy. Due to the significant energy-saving benefits of heat pump technology, household heat pump air conditioners have made great progress. By the mid-1980s, Japan had basically popularized household heat pump air conditioners.
The use of heat pump technology to produce domestic hot water is based on the heat pump type air-conditioning system, which is evolved by adding heat energy recovery devices and hot water storage devices. This type of heat pump water heater combined with household air-conditioning devices is available in the Japanese market. Important product.
According to the statistics of the Japan Heat Pump and Thermal Storage Center (JHPTC), in 2009, the production and sales volume of heat pump water heaters in Japan was about 1.1 million units, of which about 600,000 units were multi-functional combined products for air conditioning or heating. Products with hot water function are about 500,000 units. In statistics, the former data is generally used as air conditioning statistics.
The heat pump market in the EU is also constantly developing. Air source heat pumps, especially air source heat pump water heaters, account for an increasing share. In 2013, the air source heat pump water heater achieved a growth rate of 29.7%, which is the fastest growing product, and currently accounts for 11% of all heat pump products.