- With creative air conditioning concept to design and develop new building physical materials as a system solution.
- Value preservation - Energy saving - Health care - Comfort
The modern building structure with large-area glass wall and the increase of electrical and electronic technology and equipment in the buildings make the living and office environment more and more uncomfortable in summer. The traditional method is to use air conditioning equipment to cool down. This method is uneconomical in energy consumption and has environmental protection problems. The change of the small environment leads to the deterioration of the large environment, and the draught, dryness and noise are obviously harmful to health. The creative new air conditioning concept is to imagine a new building physical material PCM, which uses its excellent physical cooling performance to cool naturally, so as to eliminate all the above disadvantages.
The working principle of the exected PCM air conditioning
It is common sense that snowing is not cold and snow melting is cold. The specific experimental data are described as follows: the heat absorbed by one kilogram of ice into one kilogram of water at 0 °C is the same as that required to raise one kilogram of water to 80 ° C.
PCM can absorb a large amount of heat energy and keep the temperature unchanged,
when it melts from solid to liquid in its potential region
PCM Working Principle
Based on this principle, it is envisaged to develop a new building physical material PCM to create a new concept of passive air conditioning with energy conservation, environmental protection and advocating nature. PCM can store thermal energy by changing its polymerization state, which can be used as a potential thermal energy storage, so that the indoor temperature will not be very high in summer.
In the hot summer, when we walk into a compound of connecting courtyards or palace castle, we feel cool and refreshing. The reason is that the wall materials of these buildings are thick, so the performance of thermal insulation is good. PCM pursues this effect. However, PCM is dynamic heat storage, and its high efficiency of heat storage is reflected in its ability to use less to win more. When the external temperature rises by 10 °C and the indoor temperature remains unchanged, the corresponding building materials are required to store heat up to 5700kj (1.6 KWH). To reach this heat storage efficiency, the thickness requirements of different building materials are different. See the figure below for comparison parameters:
Pcm-25 and pcm-29 have been trial produced in Germany. The melting point of pcm-25 is 25 °C and the crystallization point is 23 °C. The melting point of pcm-29 is 29 °C and the crystallization point is 26 °C. The ideal state of using PCM can make the room cool down by an average of 6 ° C in summer. PCM reduces the temperature radiation of buildings, the room temperature is uniform, and the temperature of indoor building surface also decreases. Sensitive research results point out that people's feeling of room temperature is directly related to the temperature of the environmental surface, so people in the room will feel that the room temperature will be significantly reduced. Taking pcm-25 as an example, the measured data in September 2003 are shown in the figure below:
(The blue line indicates that PCM is used, the red line indicates that PCM is not used, and the yellow line indicates the outdoor temperature)
Comparison of indoor temperature between PCM and non PCM in light materials
Using PCM With good thermal insulation Simple building
When the outdoor temperature rises from 25 °C to 34－36 °C, PCM begins to change from solid state to liquid state partly because the melting point of pcm-25 is 25 °C. In this conversion process, PCM absorbs a lot of heat and maintains the room temperature at 22－24 °C, which is the best indoor temperature for human body. The PCM dissolved into liquid state will be recrystallized by using the temperature difference at night or the air conditioner with low electric energy at night to restore its heat storage function.
Packaging and installation of PCM air conditioning materials
The envisaged packaging of PCM air conditioning materials can be in a variety of ways, including ball packaging, board packaging, bag packaging, convex track board packaging, sealed tin plastic bag packaging, etc.
The above packaging can make the placement of PCM air conditioner simple and convenient. PCM can be used at any time for new construction or reconstruction and decoration of buildings, or additional installation can be added. If you move, you can move PCM packages together. The installation of PCM air conditioner can place PCM air conditioner materials directly in the ceiling or wall panel interlayer or cabinet. It can be placed in a single room, one floor or the whole building.
Benefits of PCM air conditioning
PCM air conditioning is a passive air conditioning. The so-called passive air conditioning refers to no energy consumption and no need to use electricity. This is especially economical compared with the traditional installation and operation of air conditioning equipment. Moreover, it is not affected by power supply shortage and power supply system failure.
PCM air conditioning works on the principle of heat storage. This is especially environmentally friendly compared with the traditional air conditioning equipment based on the principle of refrigeration and heat removal. Not only to mention that the gases emitted by some refrigeration and air conditioners damage the earth's atmosphere, but also see the dewatering of air conditioners on the ground in downtown areas in summer, furthw\er more what comes face to face and round in round is the hot gas emitted by air conditioners, which is suffocating.
PCM air conditioning creates a natural, comfortable and elegant indoor environment. PCM air conditioning does no draught, no noise, and does not cause dry air, so it is beneficial to human health care and indoor greening.
PCM air conditioning uses the excellent physical properties of special substances to work. PCM air conditioner maintains its value without maintenance, and its efficiency can always be consistent within its service life.
PCM air conditioner is simple and flexible, and easy to change and reinstallation.
