Thermoelectric supercooling cross-critical CO2 heat pump combined heating system
A heating system and transcritical technology, applied in the field of heat pumps, can solve the problems of low energy efficiency, achieve the effects of improving service life, reducing CO2 operating high pressure, and reducing pressure ratio
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Embodiment 1
[0025] Example 1: Single-stage thermoelectric subcooled transcritical CO 2 Combined heating system with heat pump
[0026] The present invention thermoelectric subcooled transcritical CO 2 Heat pump combined heating system consists of thermoelectric subcooler and transcritical CO 2 Composition of heat pump cycle, single-stage thermoelectric subcooled transcritical CO 2 Schematic diagram of heat pump combined heating system figure 1 As shown, the single-stage thermoelectric subcooled transcritical CO 2 Heat pump combined heating system cycle T-s diagram Figure 4 shown. Among them, the dotted line is the transcritical CO 2 Heat pump cycle (1-2-3-4), the thin solid line is the thermoelectric subcooling process, and the temperature of the cold end of the thermoelectric subcooler is Figure 4 The indicated a-b corresponds to the temperature, and the temperature at the hot end of the thermoelectric subcooler is Figure 4 The shown c-d correspond to the temperature, and the ...
Embodiment 2
[0029] Example 2: Two-stage thermoelectric subcooled transcritical CO 2 Combined heating system with heat pump
[0030] The present invention thermoelectric subcooled transcritical CO 2 Heat pump combined heating system consists of thermoelectric subcooler and transcritical CO 2 Composition of heat pump cycle, two-stage thermoelectric subcooled transcritical CO 2 Schematic diagram of heat pump combined heating system figure 2 As shown, the two-stage thermoelectric subcooled transcritical CO 2 Heat pump combined heating system cycle T-s diagram Figure 5 shown. Among them, the dotted line is the transcritical CO 2 Heat pump cycle (1-2-3-4), the thin solid line is the thermoelectric subcooling process, and the cold end temperatures of the two-stage thermoelectric subcoolers are Figure 5 Shown a 1 -b 1 、a 2 -b 2 Corresponding to the temperature, the temperature at the hot end of the two-stage thermoelectric subcooler is Figure 5 shown c 1 -d 1 、c 2 -d 2 Corresp...
Embodiment 3
[0033] Example 3: Multi-stage thermoelectric subcooled transcritical CO 2 Combined heating system with heat pump
[0034] The present invention thermoelectric subcooled transcritical CO 2 Heat pump combined heating system consists of thermoelectric subcooler and transcritical CO 2 Composition of heat pump cycle, multi-stage thermoelectric subcooling transcritical CO 2 Schematic diagram of heat pump combined heating system image 3 As shown, the multistage thermoelectric subcooled transcritical CO 2 Heat pump combined heating system cycle T-s diagram Figure 6 shown. Among them, the dotted line is the transcritical CO 2 Heat pump cycle (1-2-3-4), the thin solid line is the thermoelectric subcooling process, and the cold end temperatures of the multi-stage thermoelectric subcoolers are Figure 6 Shown a 1 -b 1 、a 2 -b 2 …a i -b i …a n -b n Corresponding to the temperature, the temperature at the hot end of the multi-stage thermoelectric subcooler is Figure 5 sho...
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