What happens when the water in the underfloor heating is hot and the water is cold?

Introduction What happens when the underfloor heating inlet water is hot and the return water is cold? If the inlet water of the underfloor heating is hot, it means that the heating temperature is still correct, but the return water is cold due to the following reason

What happens when the water in the underfloor heating is hot and the water is cold?

Inlet hot water of floor heating indicates that the heating temperature is still acceptable, but cold return water may have the following reasons:

1. The pressure difference between the supply water and the return water is: too small.

2. The underfloor heating pipes, the water distributor and its accessories (diverter valve) are blocked. The above reasons may cause poor circulation in the floor heating pipeline. Due to poor circulation, the cycle process from water inlet to return water outlet will take a long time, so the return water appears cold. Saying it's cool is actually just the temperature compared to the temperature of a person's palm.

There are too few geothermal pipes in a new house. Can I add geothermal heating directly to the ground?

1. Heating

The radiator usesIt uses the radiator fan to draw cold room air from the air inlet, flows through the electric heating element to heat it and then flows out through the exhaust outlet. Send hot air to achieve heating goals. The main features are that the power can be adjusted automatically, the temperature is self-limited, the heating speed is relatively fast, and the room temperature is relatively uniform and comfortable. The disadvantage is that the power consumption is relatively high and rotating the fan will produce noise.

2. Thermal heater

The thermal heater cavity is filled with thermal oil and has a large heat sink area outside. When the device is turned on, the heat sink around the built-in electric heating element. The thermal oil is heated and then dissipates the heat into the space through theheat sink to achieve heating goals. It has infrared radiation and convection effects, so it can be said to be a composite heater. Its characteristics are that the heat transfer oil does not need to be replaced, has a long service life, and has the advantages of safety and hygiene. , and dust-free; its disadvantages are relatively high energy consumption and high thermal inertia.

3. Electric heating films

There are mainly two types of high temperature electric heating films and low temperature electric heating films, which are radiant heaters. The product uses electric heating film as the heating material. It is a product that has developed rapidly in recent years. It has the characteristics of good waterproof, softness, no fear of folding, resistance tocorrosion and resistance to aging. electric heating film converts electrical energy into thermal energy, mainly through radiation to transfer heat.

Will underfloor heating cause formaldehyde to be released from the floor?

If the number of geothermal pipes in a new home is too few, installing a geothermal system directly on the ground may not be a good solution. This is because:

First, an insufficient number of geothermal pipes will result in insufficient heating capacity. The thermal effect of the geothermal system depends on the total length of the pipeline and the area of ​​the room. If there are too few pipes, even if the power of a single pipe is increased, it will be difficult to cover the entire room and achieve this. a comfortable indoor temperature.

Second, underfloor heating will slow down the heating rate ofu air conditioning system. Since the Earth system must first heat the ground and then heat the air by conduction, this heat transfer process will be relatively slow. If the air conditioning system is used to directly heat the air, the speed will be faster, which is especially important in colder seasons.

Third, the operating cost of underfloor heating is relatively high. The floor heating system needs to work continuously for a long time to guarantee the floor temperature, which will consume more electricity and increase operating costs.

Fourth, floor heating has certain requirements for crushed materials. Some stone and tiled floors are not suitable for underfloor heating, such as if the existing ground is fixed, it is not practical to change it.

So if the number of geothermal pipes inthe new house is insufficient, what is the best solution. I think the following two options can be considered:

First, install more geothermal pipes? pipes. This method is the most direct and efficient and can completely solve the problem of insufficient heating capacity. However, if the house is finished, the renovation will be more difficult and the cost will be higher.

The second is to cooperate with other heating systems. For example, add air conditioning systems or fireplaces in certain rooms to supplement heating or install auxiliary floor heating systems such as electric blankets and infrared heating panels. At the same time, this can solve certain room heating problems without increasing the cost of the renovation too much.

In summary, if the number of geothermal pipes in a new house is too low, the eThe effect of installing a geothermal system directly on the ground is not ideal. Heating capacity and speed may not be up to par. standard, and the cost will be high. A better solution is to install more geothermal pipes to completely solve the problem or work with other heating systems. Flexible selection according to the actual situation can achieve better heating effect without increasing the cost too much.

Yes, the amount of free formaldehyde released from the panel is positively correlated with temperature and increases as the temperature increases. When the temperature rises above 25 degrees, the amount of formaldehyde released begins to increase significantly. However, when the temperature of floor heating does not exceed 25 degrees, the impact of floor heating on formaldehyde in the floor is very small.

Be extremely careful when choosing the reground clothing. If necessary, ask the flooring manufacturer to issue an environmental test report for the flooring to eliminate the possibility of formaldehyde damage at the source.

Try choosing your home decoration in summer. In the high temperature environment of summer, a large amount of formaldehyde in the soil can be released, further reducing the formaldehyde content indoors.

After moving in, remember to ventilate frequently and place activated carbon and green plants such as spider plants, Sansevieria, aloe vera and agave indoors. 'interior.

The temperature of the underfloor heating should be set between 18 and 23 degrees. In this temperature range, the problem of formaldehyde release caused by temperature can be solved to the greatest extent. suitable for underfloor heating, at the user's temperature, comfortable but not drynot singing.

Floor heating materials should also choose environmentally friendly materials such as green feather auxiliary materials to eliminate possible dangers related to all aspects of floor heating.

Increasing temperature will in fact increase the quantity of formaldehyde released. However, this is an objective reality; you should know that the actual temperature when using underfloor heating is much lower than the normal summer temperature. blindly If you are worried about the formaldehyde problem, it would be better to carefully select qualified and environmentally friendly flooring.

Author: Ying Nuanji

Link: https://www.zhihu.com/question/28651028/answer/47132814

Source: Zhihu< /p >

Copyright belongs to the author. For commercial reprinting, please contact the author for permission. For a reprint nocommercial, please indicate the source.

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