Transcription of 日本機械学会熱工学部門 JSME Thermal Engineering Division …
1 ISSN 2185-372X - 1 - JSME Thermal Engineering Division Thermal Engineering TED Newsletter December 2021 1. TED Plaza 2. 2021 3. 2021 4. 2021 5. 98 2020 6. 7. TED Newsletter on the WEB JSME TED Newsletter, , 2021-2-TED Plaza 1756 Leidenfrost 1974 1861 Joule 1973 1 1 2 3 2050 4 Fig.
2 1 A brief history of refrigerant from 1st generation to 4th generation1stGenerationCO2, NH3, SO2, HCs, CCl4, H2O, etc. 2ndGenerationCFCs ( ), HCFCs (R22,..) etc. 3rdGenerationHFCs(R134a, R32), HFC mixtures,(R410A, R404A) etc. 4rdGenerationHFOs ( r1234yf ,..)HFO/HFC mixture HFO/HFO mixtureetc. 1830 ~ 1930s1930 ~ 1990s1990 ~ 20122013 ~ Whatever workedSafety DurabilityEnvironment- Ozone protection Environment- Global warming- Ozone protection Final Generation ?NH3CO2 HCs Natural RefrigerantsSynthetic RefrigerantsGreen GenerationHFC(R32)WaterAir JSME TED Newsletter, , 2021-3- 4 GWP Hydrofluoroolefin (HFO) HFO 5 5 Hydrofluorocarbon (HFC) GWP 1 HFC HFO HFO Temp.
3 Glide Table 1 Thermophysical properties of natural refrigerants, HFCs, and HFO/HFO blends calculated with REFPROP (Lemmon et al., 2018) 2 3 GWP . 2 (a) (b) (c) JSME TED Newsletter, , 2021-4- (a) Spiral (b) Cross grooved (c) Herringbone Fig.
4 2 Microfin tubes 3 3(a) 1998 2000 3(b) (a) Thin film region(b) Thick film regionFig. 3 Liquid film on a microfin tube and temperature and velocity distributions TTsatTwallyTTsatTwallyuu0ySaturated vaporuu0yTwallTsatTyTwallTsatTyJSME TED Newsletter, , 2021-5- . 4 Excel (1) (2) (3) (4) (1) (2) (3) REFPROP (4) DOI Fig.
5 4 Data collection scheme and basic data format . 5 We b s i t e Fig. 5 Network configuration of heat transfer databaseJSME TED Newsletter, , 2021-6- . 6(a) 6(b) 2 ASHRAE 7(a) (d) 7(a) 7(b) 7(c)
6 7(d) (a) Top page (b) Selection of heat transfer type and refrigerantsFig. 6 Website of the heat transfer databaseJSME TED Newsletter, , 2021-7- (a) Mass velocity and pressure conditions (b) Heat transfer coefficient versus vapor quality (c) Heat transfer coefficient versus heat flux (d) Heat transfer coefficient versus mass velocityFig. 7 Examples of data display form . 2017 8 JSME TED Newsletter, , 2021-8-Fig.
7 8 Future development of heat transfer database and application network . NEDO P18005 Vo l . 3 1 (2017) Vo l . 1 (1973) Joule, , On the Surface-Condensation of Steam, Philosophical Transactions of the Royal Society of London, , (1861), B Vo l . 6 6 (2000) Lemmon, , Bell, , Huber, , McLinden, , NIST Standard Reference Database 23: Reference Fluid Thermodynamic and Transport Properties-REFPROP, Version , (2018).
8 Vo l . 2 (1974) Leidenfrost, , De Aquae Communis Nonnullis Qualitatibus Tractatus, Ovenius, Duisburg am Rhein (in Latin), (1756). B Vo l . 6 4 (1998) JSME TED Newsletter, , 2021-9-TED Plaza FCV EV 2021 9 8 2 220 EU 7 5400 70 ( 2021) EV 2035 100% ( 2021) EV 30 1991 ( )
9 330 Wh/L 90 Wh/kg 2 600 Wh/L 200 Wh/kg ( 2018) EV 2000 EV EV EV JSME TED Newsletter, , 2021 - 10 - EV 200~500 L 1 5~10 (Girishkumar et al.)
10 , 2010) 10 mA/cm2 ~ mA/cm2 (Xianglin et al., 2015) 500 m (Shibata et al., 2015) Fig. 1 Schematic image of lithium-air battery (discharge process) LiNegativeelectrodePositiveelectrodeO2 Protective layerOxygen concentrationin the electrolyteLowHighe-Electrolyte (LiCl aq.
