The new type of environmental protection air conditioner came out!Hydrinating hydrocarbons that instead of strong temperate effect

Researchers reported a prototype equipment that can replace the existing "air conditioning" at a autumn meeting of the American Chemistry Society ...

Source ｜ Science and Technology Daily

Author ｜ Zhang Mengran

Edit ｜ Zhang Runqi

This summer, the global heat is hot, and the use of air conditioners has increased dramatically. However, the hydrofluent refrigerant in the air conditioner is a powerful greenhouse gas and one of the main driving forces of climate change. Researchers reported a prototype equipment that can replace the existing "air conditioning" at a autumn meeting of the American Chemistry Society. It is more environmentally friendly and uses a solid refrigerant to effectively cool.

The greenhouse effect caused by the refrigerant used in the existing air -conditioning system is thousands of times stronger than carbon dioxide, and it may leak unexpectedly during treatment or disposal. The traditional refrigeration system works by recycling the refrigerant between gas or liquid. Although this cycle is valid, concerns about climate change and stricter supervision of hydrofluor hydrocarbon refrigerant are prompting people to find refrigerants that are more responsible for the environment.

Solid refrigerant is considered an ideal solution. Unlike gas, solids will not leak from the air conditioner device to the environment. The working principle of a solid refrigerant is similar to the traditional gas -liquid cooling system. It uses pressure changes to perform heat circulation. The material is still solid, but the internal sub -structure has changed. Researchers said that the process of molecular chain changed from an orderly structure to a relaxation structure like a melting wax. When the pressure was released, the material re -absorbed the heat and complete the cycle.

However, the disadvantage of this system is that it requires expensive dedicated equipment, which is not practical for the cooling application of the real world. The research team of Harvard University reports a pneumatic material that can be used as refrigerant with much low pressure. This refrigerant, known as metal halide perovskite, can circulate under the pressure of about 2722 kg per square inch, which is the pressure of typical hydraulic systems.

The team has built the first prototype to show the use of these new materials in the actual cooling system. The device has three main parts. Some are metal tubes equipped with solid refrigerant and inert liquid (water or oil); the other part of the device is a hydraulic piston for applying pressure to the liquid; in the end, the liquid helps to pass the pressure to the refrigerant and help help Yu bring the heat into the system.

After solving the project challenge, the team stated that the air pressure material can be used as a functional refrigerant and transforms pressure changes into a complete temperature change cycle. This is the first cooling system that uses a solid -state refrigerant that depends on stress changes, indicating that solid refrigerant can become a feasible alternative to the current air conditioner and other cooling devices.

Chief Editor Circle Point

The weather is hot, and the greenhouse gases discharged by air -conditioning and air -conditioning will exacerbate the heat of the weather and form a difficult cycle. Statistics show that by 2050, indoor air conditioners will reach 4.5 billion units. Researchers put forward the idea of ​​solid refrigerant. When temperature changes, their molecular structure changes, but it is still a solid state. This solid refrigerant requires huge pressure to drive the thermal cycle. The equipment that generates pressure is high, it is difficult to promote it on a large scale, and it is impossible to replace the traditional refrigerant. The new types of materials reported in this article can act as refrigerant at lower pressure and open a path for the application of new green refrigeration materials.

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