Energy Saving Of Air-energy Water Heaters

There has always been a saying that "30% of the product and 70% of the installation" for air-energy heat pumps. This means that the quality of a product is not only related to the quality of the product itself, but also closely related to whether the installation is standard, which is particularly obvious for air-energy water heaters in water systems. It is often easy to ignore the details in the installation, resulting in insignificant air energy saving effect or reduced user experience.

 

The host installation location is not ventilated

The air-energy water heater heats by absorbing heat from the air, so the installation location of the host should try to choose an installation place with good ventilation and smooth exhaust. If the host is installed in a closed space, it will affect the host to take heat from the air, resulting in insufficient heat energy and a corresponding reduction in energy saving effect.

• The thermal insulation performance of the material is not good enough

When designing the wiring, the use of high-quality thermal insulation materials for the pipeline materials should be considered to minimize the heat loss caused by poor pipeline materials. The thermal insulation of the pipeline and the water tank is conducive to alleviating the heat exhaust itself, improving the thermal efficiency of the host, and achieving better energy saving effects.

As we all know, the water tank must be connected to the water inlet and outlet. Dealers should consider what kind of pipeline to use, not only calculating the cost, but also considering practicality and aesthetics. No matter which pipe you choose, you should try to choose a brand that can guarantee quality and quantity. During the installation process, the water pipe should be insulated as much as possible to reduce heat loss.

If the use of air energy is determined, the planning of PPR water pipes should be determined in the construction and design of houses and projects. Considering the importance of the tightness of imports and exports, after-sales installation personnel need to conduct continuous pipe compression tests on the cold and hot water pipes of the entire heat pump unit to check whether they are normal and qualified, to prevent the subsequent laying of cement, floor and other materials. The connection pipe is disconnected, which will cause the cold and hot water pipes to be combined, and the cold and hot combination will affect the energy saving effect of the unit. At the same time, the insulation of the water tank is also very important. Usually, the stainless steel insulated water tank will use a polyurethane foam insulation layer, which has a better insulation effect. However, when the temperature is low in winter, certain insulation measures can be taken to reduce the heat dissipation of the water tank itself.

• There is a problem with the matching of the water tank and the host

The rationality of the matching of the host and the water tank is more important in engineering machinery. For example, in a 5-ton water project, some engineers gave a configuration of 4 horsepower machines with 5 tons of water to obtain this project, and some were 5 matching 5 tons. In some areas, summer operation may be very energy-saving, but problems arise in winter and costs increase dramatically, so it is natural to feel that air conditioning cannot save energy.

Commercial air energy small host cannot be equipped with a large-ton water tank. If 5 tons of water needs to be equipped with a host of about 10 horsepower, it can guarantee daily water consumption and save use costs. If multiple units provide a large water tank, it is best to make the same distance. The same length of pipes at all ends can ensure the hydraulic stability of the system and help the system achieve better energy-saving effects.

• Unreasonable pipeline installation method and unreasonable pipeline layout

During the installation process, each process must be implemented carefully, details cannot be ignored, and the engineering installation method will also affect the energy-saving effect of the air energy water heater. From the different ways of use, it can be divided into two modes: all-weather water supply and timed water supply: all-weather water supply is mainly used in hotels, guesthouses and other places, and timed water supply is mainly used in schools, factories and other places. The installation method of timed water supply is relatively simple. Just use two circulation pipes on the water tank and the host for circulation heating, and then use up the hot water within a certain period and add cold water for heating, so that the energy-saving effect is better.

The installation methods of all-weather water supply include direct heating, circulation, water tank size, etc. Direct heating refers to hot water that can be used directly after the cold water is heated by the main unit. This principle controls the amount of water replenishment through the throttling device, and the water flow cannot fill the entire heat exchanger. Therefore, considering that the pipe diameter of the heat exchanger cannot be too large, it should be adjusted repeatedly to select the most reasonable pipe diameter and water intake method.

In the pipeline layout, the pipeline length and specific location should be determined according to the specific conditions such as the main unit installation location, water tank location, building layout, water use point, etc., and the pipeline length should be shortened as much as possible. At the same time, the pipeline should be installed horizontally or vertically to weaken the water circulation resistance and reduce the heat loss of the pipeline itself.

• Unreasonable control of the return water system

Users who use air-energy water heaters may encounter such a problem: after some time, the air-energy water heater does not produce hot water, and the water in the hot water pipe will become cold. When using hot water, you must wait for the cold water to flow out and the hot water to flow out, which not only wastes resources but also is very inconvenient to use. Therefore, we installed a return water system for the water heater. The main component of the return water system is the return water pump, and then a control system is added to the return water pump.

 

There are three control methods for traditional control systems:
One is time control, that is, starting the return pump within the set return time. Within the set time, whether the customer uses hot water or not, the return pump will start, consuming the heat of hot water, increasing the energy consumption of the water heater, and shortening the service life of the return pump; the defect of time control is that whether the customer uses hot water within the set time or not, the return pump will start, shortening the service life of the return pump, causing the water heater to heat slowly or not heat within the set return time.

One is remote control, that is, when using hot water, first operate the controller to send the return pump start signal. The customer has many hot water use points, and there is only one controller, which is easy to lose or difficult to find, and it is very inconvenient to use.
One is temperature control, setting the return water temperature, when the water temperature of the hot water pipe is lower than the return water setting value, the return water pump starts, regardless of whether the customer uses hot water, the return water pump starts every ten minutes, consuming the heat of hot water, and increasing the energy consumption of the water heater. When the water temperature of the water heater is lower than the return water setting value or the water heater is turned off, the return water pump will continue to run, but it will cause the water heater to heat slowly or not, shortening the service life of the return water pump.

 

Under the premise that the water point is far away from the water heater, a return water system needs to be installed, which can not only greatly save the time of waiting for hot water and improve the user's water experience, but also save water and the overall power consumption of the water heater. When installing the return water system, the building structure, space layout and actual customer needs are required to determine the control scheme of the return water system, or choose an intelligent control system, so that the water can come back without coming back, and it can stop when it comes back, and the water heat cannot come back, which better presents the energy-saving performance of air energy.

 

In addition, before installing air energy, it is necessary to confirm whether the grid voltage in the area is consistent with the standard voltage of the water heater unit, and whether the load capacity of the power supply, wires and sockets is suitable for the input power of the machine to prevent the unit from being unstable and causing frequent startup. The gate valve is a very important stage. During installation, the appearance of the connection port needs to be checked to ensure that there is no penetration.