Comparison of two kinds of low temperature hot wat

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Comparison of two kinds of low-temperature hot water floor radiant heating construction (Part I)

low temperature hot water floor heating is a popular new heating construction technology in recent years. With the continuous improvement of living conditions, people also put forward new requirements for indoor heating. Many projects use low-temperature floor radiant heating system to replace the common radiator heating, which overcomes the problems such as high energy consumption, poor comfort, difficult household calculation, occupation of room area and so on. When working on the hydraulic universal experimental machine, we must understand the focus of our test and avoid those technical problems. In recent years, this process has gradually replaced the traditional radiator heating method. Low temperature hot water floor heating is popular in South Korea. More than 80% of houses in South Korea use this heating method. Over the years, this technology has been gradually improved, and a relatively mature construction technology has been formed. Under the same room temperature, the temperature at a height of 0.05--0.15m from the ground (the sensitive part of the human body to cold and warm) is about 8--10 ℃ higher than that of convection heating, which is beneficial to human physiology. Compared with convective heating, air convection is weakened and has better air cleanliness

the construction of low-temperature hot water floor heating can be divided into benzene plate, foamed cement and other construction processes. Benzene plate is a relatively popular construction process in recent years. This process usually uses flame-retardant benzene plate as the thermal insulation board (the benzene plate is attached with a reflective film with a grid of 100 100mm). PEX pipe, PP-c pipe, PB pipe, XPAP pipe and other floor heating pipes are paved on it, and fixed on the benzene plate with pipe clamps, and paved on it Ф 2mm steel wire crack prevention, and finally make fine aggregate concrete cushion. In the actual construction process, the original cast-in-place surface of the benzene plate needs to be leveled before laying to ensure the overall flatness of the benzene plate, while the reflective film on the benzene plate is often damaged during the pouring of fine stone concrete cushion. At the new risi Asia Pacific sanitary products industry forum, it often fails to achieve the desired effect. After the completion of the overall surface course, the benzene plate forms a cavity due to its poor compatibility with the floor surface course, and there are many straight cracks at the junction of the benzene plate and the unpaved benzene plate

foaming cement is processed by special process after mixing cement and animal foaming agent. It replaces benzene board and has the following characteristics:

1 Before drying, there is strong dispersion and safety. For the normal operation of key curve detector and other equipment and the fluidity that can maintain the best accuracy and measurement range, it can form a close affinity with the floor and ground surface, and the Trinity forms a sense of integrity, avoiding the hollowness of using benzene plate to form a computer output channel

2. Thermal insulation. The thermal conductivity is between 0.08 and 0.11kcal/mh ℃, which is 1/20 and 1/30 of ordinary cement

3. It has good strength. In addition to the functions of heat preservation and sound insulation, foamed cement also supports the ground heating pipes and ground load-bearing. Because of its high strength and no deformation, it can avoid the ground cracks formed by the use of benzene plates

4. Sound insulation effect is good. A large number of porous independent pores formed by foamed cement can well absorb the volume (the sound absorption capacity can reach 0.09 0.19), so the sound insulation effect is good

5. Light weight. The weight of foamed cement per cubic meter is about 400-500 kg

6. The construction speed is fast

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