A group of mixed working media containing HFCs and HPCs for mid-high temperature heat pump
A mixed working medium and high temperature heat pump technology, applied in the field of refrigeration working medium, can solve problems such as inability to provide heat energy, easily cause accidents, and deteriorate cycle performance, and achieve the effects of excellent environmental characteristics, protection of the ozone layer, and reduction of the greenhouse effect
Inactive Publication Date: 2006-05-10
TIANJIN UNIV
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AI Technical Summary
Problems solved by technology
At present, the most widely used air-conditioning-heat pump systems use HCFC22 or its substitutes R407C, R410A, etc. as working fluids. The upper limit of pressure and exhaust temperature is easy to cause accidents), and cannot provide heat energy at a higher temperature level
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0027] Example 1: 43% HFC134a, 3% HFC152a and 54% HFC254cb are physically mixed at room temperature as refrigerant.
Embodiment 2
[0028] Example 2: 6% HFC134a, 72% R13I1 and 22% HFC254cb are used as refrigerant after physical mixing at normal temperature.
Embodiment 3
[0029] Example 3: Take 7% HFC152a, 70% R13I1 and 23% HFC254cb, and use them as refrigerant after physical mixing at normal temperature.
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A medium-high temperature heat pump mixed working fluid containing HFCs and HFEs is suitable as a refrigerant for medium-high temperature heat pump systems with a condensation temperature of 60-120°C. The mixed working fluid can be composed of R13I1, HFC134a, CHF 2 OCHF 2 (HFE134), CH 2 FOCHF 2 (HFE143), HFC152a, HFC245ca, HFC254cb, HFC236ea material composition, binary and ternary mixtures composed of different mass ratios. The invention does not destroy the ozone layer, has low greenhouse effect potential, meets environmental protection requirements, and has excellent cycle performance. It can not only adopt HCFC22 air-conditioning compressor to optimize the design of the new medium-high temperature heat pump system, but also directly apply the new working medium to the original HCFC22 air-conditioning unit .
Description
technical field [0001] The invention belongs to refrigerants in heat pumps or refrigeration and air-conditioning systems, and particularly relates to refrigerants used as refrigerants in medium-high temperature heat pump systems with a condensation temperature of 60-120°C. Background technique [0002] For the energy-consuming links that exist in large numbers in production and life and require relatively low thermal energy grades (temperature is 60-160°C), the use of heat pump heating technology not only has a higher total energy utilization efficiency than conventional energy supply methods, but also reduces CO 2 emissions (thereby reducing the greenhouse effect), and can also effectively utilize industrial waste heat, geothermal energy, solar energy, and low-grade heat energy contained in the environment (air, soil, surface water or shallow groundwater) to reduce heat pollution caused by waste heat discharge. At present, heat pump technology is d...
Claims
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IPC IPC(8): C09K5/04
Inventor 王怀信马利敏郑臣明张宇杨强
Owner TIANJIN UNIV