Performance comparison of two absorption-compression hybrid refrigeration systems using R1234yf/ionic liquid as working pair
| Autor: | Lihang Bai, Xiangyang Liu, Zheng Ye, Maogang He |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment 020209 energy Energy Engineering and Power Technology Refrigeration Thermodynamics 02 engineering and technology Coefficient of performance law.invention chemistry.chemical_compound Fuel Technology 020401 chemical engineering Nuclear Energy and Engineering chemistry law Ionic liquid 0202 electrical engineering electronic engineering information engineering Absorption refrigerator 0204 chemical engineering Absorption (electromagnetic radiation) Condenser (heat transfer) Gas compressor Evaporator |
| Zdroj: | Energy Conversion and Management. 181:319-330 |
| ISSN: | 0196-8904 |
| Popis: | R1234yf (2,3,3,3-tetrafluoroprop-1-ene)/ionic liquid is a kind of environment-friendly working pair, which can overcome the disadvantages of H2O/LiBr and NH3/H2O. In this work, three new working pairs R1234yf/[HMIM][TfO], R1234yf/[HMIM][PF6], R1234yf/[HMIM][BF4] were proposed and new solubility data for them were determined. Two new absorption-compression hybrid refrigeration systems were proposed to improve the cooling performances of the single-effect absorption refrigeration system using R1234yf/[HMIM][TfO], R1234yf/[HMIM][PF6] and R1234yf/[HMIM][BF4] as working pair. The effects of compressor position, compression ratio (r), generation temperature (Tg), evaporation temperature (Te), condensation temperature (Tc) and absorption temperature (Ta) on the coefficient of performance (COP) and circulation ratio (f) were analyzed. Comparison result shows that the two systems can effectively improve the cooling performance of the single-effect absorption refrigeration system including increasing COP, reducing the heat load of condenser and f, and enlarge the operation range of Tg, Ta, and Te. Putting compressor between evaporator and absorber is a better choice than putting it between generator and condenser. R1234yf/[HMIM][TfO] shows better cooling performance than R1234yf/[HMIM][PF6] and R1234yf/[HMIM][BF4] due to its favorable thermophysical properties. |
| Databáze: | OpenAIRE |
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