Heat transfer compositions, methods and systems
A composition, heat transfer technology, applied in the field of heat transfer composition, and system, which can solve the problems of increased use of fossil fuels, loss of thermodynamic performance or energy efficiency of refrigerants, etc.
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Embodiment 1
[2544] Example 1: Residential Air Conditioning System (Cooling)
[2545] illustrate:
[2546] Residential air conditioning systems are used to supply cool air (approximately 12°C) to buildings in summer. Typical system types are split, mini-split, and window air conditioning systems. The system typically has an air-refrigerant evaporator (indoor coil), a compressor, an air-refrigerant condenser (outdoor coil), and an expansion valve. Evaporators and condensers are usually tube-sheet-fin or microchannel heat exchangers. The compressors are usually reciprocating or rotary (rolling piston or scroll) compressors. The expansion valve is usually a thermal expansion valve or an electronic expansion valve. The refrigerant evaporation temperature is in the range of about 0°C to about 10°C, and the condensation temperature is in the range of about 40°C to about 70°C.
[2547] Operating conditions:
[2548] 1. Condensation temperature = 46°C, corresponding outdoor ambient tempera...
Embodiment 2
[2562] Example 2: Residential heat pump system (heating)
[2563] illustrate:
[2564] Residential heat pump systems are used to supply warm air (approximately 21°C) to buildings in winter. It is usually the same system as a residential air conditioning system, however, when the system is in heat pump mode, the refrigerant flow is reversed and the indoor coil becomes the condenser and the outdoor coil becomes the evaporator. Typical system types are split and mini-split heat pump systems. Evaporators and condensers are usually tube-sheet-fin or microchannel heat exchangers. The compressors are usually reciprocating or rotary (rolling piston or scroll) compressors. The expansion valve is usually a thermal expansion valve or an electronic expansion valve. The refrigerant evaporation temperature is in the range of about -20°C to about 3°C, and the condensation temperature is in the range of about 35°C to about 50°C.
[2565] Operating conditions:
[2566] 1. Condensation ...
Embodiment 3
[2580] Example 3: Commercial Air Conditioning System - Chiller
[2581] illustrate:
[2582] Commercial air conditioning systems (chillers) are used to supply cooling water (about 7°C) to large buildings such as offices, hospitals, etc. Depending on the application, the chiller system can run year-round. Chiller systems can be air-cooled or water-cooled. Air-cooled chillers typically have a plate or shell-and-tube evaporator to provide cooling water, a reciprocating or scroll compressor to exchange heat with ambient air, a tube-sheet-fin or micro-channel condenser, and Thermal expansion valve or electronic expansion valve. Water-cooled systems typically have a shell-and-tube evaporator to provide cooling water, a reciprocating or scroll compressor to exchange heat with water from cooling towers or lakes, oceans, and other natural sources, a shell-and-tube condenser , and thermal expansion valve or electronic expansion valve. The refrigerant evaporation temperature is in...
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