What are the applications of air energy heat pumps?

After about 30 years of development and improvement, China's heat pump technology and product application fields are very extensive, and its diversity has ranked first in the world. Covering domestic and commercial hot water, heating, constant temperature greenhouse, refrigeration, drying, drying, high-temperature heat pumps, industrial special heat pumps, constant temperature storage, complementary energy and other fields, covering a market capacity of over one trillion yuan. And based on "heating technology", it continuously extends outward, gradually penetrating into various fields such as home appliance industry, air conditioning industry, solar energy industry, and electric heating industry!

What are the applications of air energy heat pumps- Air energy heat pump manufacturer

Simply put, different outlet temperatures correspond to different application scenarios. Today, let's take a look at the applications available.

（1） 7 ℃: central air conditioning refrigeration

Many people believe that air energy heat pumps and central air conditioning are completely different industries. Air energy heat pumps specialize in "heating", while central air conditioning focuses on "cooling". In fact, the air energy heat pump host "civil and military (cold and warm)" is a more excellent "central air conditioning"

What are the applications of air energy heat pumps- Air energy heat pump manufacturer

The area of the evaporator, heat exchange air volume, and fin spacing of the air energy heat pump product are all larger than those of the central air conditioning. During summer refrigeration, the evaporator becomes a condenser, which plays a role in dissipating heat outdoors. Therefore, its performance is superior to that of central air conditioning, which means it can completely replace central air conditioning during refrigeration. This avoids the repeated investment of household cold and heat sources, and solves the problem of cold and heat in one machine!

Compared with ordinary central air conditioning, the standard for cold and warm air source heat pump units is GB/T25127, and the standard for central air conditioning is GB/T18430. The cold and warm air source heat pump adopts a "jet enthalpy increasing" compressor, and the main design working conditions during heating are below 0 ℃. The main function is heating, and the end is mainly floor heating, radiators, and fan coil units. All design conditions for central air conditioning heating are above 0 ℃, with a focus on refrigeration and heating, and the end is mostly fan coil units without floor heating or radiators.

（2） 27 ℃: Constant temperature hot water in the swimming pool

With the gradual popularity of green, low-carbon and comfortable home living concepts, people not only hope to enjoy comfortable swimming fun in the scorching summer, but also hope to experience a fresh swimming environment in the cold winter. For managers of swimming pools, air powered pool heat pumps hope to meet people's requirements while also greatly reducing investment costs and management fees, and obtaining more investment returns. Compared to ordinary swimming pool equipment, it is undoubtedly able to win the favor of customers in terms of technology and economy.

What are the applications of air energy heat pumps- Air energy heat pump manufacturer

At present, the heat pump swimming pool unit not only circulates and exchanges heat from the pool water in the heat pump unit, ensuring a constant water temperature. It also has both fresh air and dehumidification functions, and can add air ducts to the swimming pool dedicated heat pump unit to introduce outdoor fresh air to the indoor swimming pool and replace the air in a timely manner. And in conjunction with a dehumidification fan cabinet, the indoor swimming pool environment is dehumidified by absorbing heat from the indoor pool air.

When using a heat pump unit to heat the swimming pool water, compared to the traditional heating method of boiler+plate heat exchanger, the operating cost can be saved up to 80%.

（3） 35~45 ℃: Floor heating and hot water

The optimal working state of an air source heat pump is to provide hot water below 45 ℃. In this working state, the air source heat pump has a high energy efficiency ratio, strong energy-saving performance, and stable operation. Within this temperature range, the application of air source heat pumps in the domestic and commercial hot water fields has become very popular, and we will not elaborate on it here. Today, let's talk about floor heating separately.

What are the applications of air energy heat pumps- Air energy heat pump manufacturer

The hot water required for floor heating is around 45 ℃, and the heat pump is used in conjunction with geothermal pipelines, resulting in high heating efficiency. Even after a heating season, the electricity cost of the equipment is far lower than that of traditional thermal storage electric heaters. If combined with efficient floor heating devices, such as the "prefabricated trench thin floor radiation heating board", the water inlet temperature only needs 35 ℃, then the energy-saving effect is more significant. Currently, floor heating is recognized as the best end heating solution for air source heat pumps.

Meanwhile, compared to central air conditioning, the biggest advantage of air source heat pumps is that they can be grounded and warm at the end, making them more comfortable. The operating characteristics of underfloor heating and radiators are small flow rate and large temperature difference, while the operating characteristics of fan coil units are small temperature difference and large flow rate. So the design concept of air source heat pump is different from that of central air conditioning. Central air conditioning is based on the premise that the end is a fan coil unit, and the two units are too small and the water pump is too large, without considering the operating characteristics of underfloor heating. So traditional central air conditioning cannot provide underfloor heating.

（4） 50 ℃: Agricultural greenhouse, animal husbandry and breeding

Traditional agricultural greenhouses and animal husbandry generally use coal-fired hot air stoves and other electric heating equipment for heating. Not only does it require high energy consumption and pollution, but it also requires dedicated personnel to continuously monitor and maintain temperature stability for a long time. Once temperature fluctuations occur, the losses to farmers and breeders are often enormous.

What are the applications of air energy heat pumps- Air energy heat pump manufacturer

The air source heat pump, combined with underfloor heating, heat sink, and fan plate, not only generates uniform and fast heating, but also intelligently controls the temperature inside the greenhouse. Although the initial investment is relatively large, in daily use, the heating of the heat pump is more stable, reducing various losses caused by temperature fluctuations. The unit does not require dedicated management during operation, and the cost is more economical.

In the past two years, in order to ensure the supply of winter agricultural products and reduce coal pollution in winter agricultural production, provinces such as Beijing, Hebei, Henan, and Shanxi have explicitly renovated suburban coal-fired heating agricultural greenhouses, with air source heat pumps as the main heat source. Implement clean energy transformation such as air source heat pumps for seed agriculture facilities such as "breeding, seedling raising, and seedling raising".

（5） 55 ℃: fan disc and new radiator heating

The advantages of fan coil units in heating systems are mainly reflected in: short start-up time, which is conducive to energy conservation; Simplify the system, facilitating design and installation; Simple control; Low cost.

Fan coil unit is a type of forced convection radiator, and the water supply temperature of the pipeline is not high. Generally, the water supply temperature of the fan coil unit does not need to exceed 60 ℃. A heat source with a temperature above 40 ℃ can ensure the effective operation of the fan coil system. 40 ℃ hot water is an easy task for air energy heat pump systems.

（6） 65 ℃: Retrofit of old-fashioned radiators

The heat dissipation principle of a radiator is that hot water flows in it, dissipating heat outward, and increasing room temperature. There are many materials for radiators, including iron radiators, steel radiators, and copper aluminum composite radiators. Most of them are made of metal and have a certain reduction effect on heat transfer, which is not as effective as direct hot air blowing.

So when paired with radiators, air energy heat pumps often require a water temperature of over 60 ℃ to achieve indoor heating. Therefore, air energy heat pumps require more power consumption to generate more heat. Moreover, the larger the housing area, the more radiators are required, which will occupy indoor space and reduce the area for personal activities. However, the advantages of radiators are also very obvious, which are short installation cycles, simple construction methods, and low costs.

For some heating systems that require a water temperature of 75 ℃ or even higher, high-temperature cascade heat pumps can be used to meet the requirements.

（7） 75 ℃: drying in industries, agriculture, and services

Hot water or hot air drying at around 55-75 ℃ is the advantage of air source heat pumps. Heat pump drying, as a potential market for energy conservation, cross development between agricultural machinery and HVAC, has been in a rapid development period in recent years, attracting increasing attention from government departments, as well as various industries such as HVAC, agricultural machinery, agricultural product processing, and environmental protection.

The drying market has always been a weakness in China's agricultural machinery market. The average drying rate of food, tea, medicinal materials, and sludge is relatively low. However, it is precisely because of this that the development potential of the heat pump drying machine market is enormous and there is much room for improvement. With the continuous increase in sales of heat pump dryers, their application effects are gradually recognized by more people, mainly in three key areas: agriculture, industry, and service industry.

From the current energy structure and environmental pressure, the development potential of heat pump drying is very great. According to statistics, under the same working conditions, the heat pump drying system saves 70% energy compared to the coal-fired system; 70% lower carbon emissions; PM10, PM2.5, and other inhalable particulate pollutants decreased by 99%. If all coal-fired grills are replaced, the estimated market share of heat pump drying will exceed trillion yuan.

（8） 85 ℃: disinfection, high-temperature hot water

In the field of high-temperature hot water, the most common application of air energy heat pumps is in the electroplating industry. The electroplating process has very strict requirements for hot water, and continuous hot water temperature of no less than 68 ℃ is required during the production process.

According to rough statistics, there are currently 15000 electroplating production plants nationwide, with over 5000 production lines and a production capacity of 250-30 million square meters of electroplating area. In order to solve the problem of air pollution, governments in various regions are currently demolishing traditional coal-fired, oil-fired, or gas-fired boilers within a specified period of time.

By using an air powered high-temperature heat pump, the solution can be heated to 72 ℃ and supplied to an insulated water tank. The high-temperature solution in the water tank is supplied to the electroplating tank, and the workpiece and solution flow in reverse. After the workpiece is plated, it flows out of the plating bath. The solution is cooled to 68 ℃ after passing through the plating bath, which can fully meet the production needs of the electroplating factory.

summary

We have finished discussing common application scenarios, but there are still many areas where air energy heat pumps can be applied that have not been introduced yet. For example, more customized drying, low-temperature storage, household hot water, and waste heat recovery from bathing. With the further promotion of "energy conservation and emission reduction" and "clean energy substitution" by the country, heat pumps have played a significant energy-saving effect in all areas that require heating.