PDF Publication Title:
Text from PDF Page: 016
Energies 2019, 12, 479 16 of 17 Symbols h specific enthalpy (kJ/kg) p pressure (bar) Q ̇ heating power of the water heater kW s specific entropy (kJ/kg·K) T temperature (◦C) W ̇ electric power consumption (kW) w specific work (usually with “el” subscript) (kWh/kg) Greek Symbols ηs compressor isentropic efficiency (-) ∆Tsup superheat at the compressor suction (◦C) ∆TPP temperature approximation or pinch point (◦C) εHX heat exchanger efficiency (-) Subscripts and Superscripts 0 el i w,in w, out ambient electric state point water heater inlet water heater outlet References 1. Nawaz, K.; Shen, B.; Elatar, A.; Baxter, V.; Abdelaziz, O. Performance optimization of CO2 heat pump water heater. Int. J. Refrig. 2018, 85, 213–228. doi:10.1016/j.ijrefrig.2017.09.027. 2. Willem, H.; Lin, Y.; Lekov, A. Review of energy efficiency and system performance of residential heat pump water heaters. Energy Build. 2017, 143, 191–201. doi:10.1016/j.enbuild.2017.02.023. 3. Zhang, J.F.; Qin, Y.; Wang, C.C. Review on CO2 heat pump water heater for residential use in Japan. Renew. Sustain. Energy Rev. 2015, 50, 1383–1391. doi:10.1016/j.rser.2015.05.083. 4. Li, L.; Ge, Y.; Luo, X.; Tassou, S. Thermodynamic analysis and comparison between CO2 transcritical power cycles and R245fa organic Rankine cycles for low grade heat to power energy conversion. Appl. Therm. Eng. 2016, 106, 1290 – 1299. doi:10.1016/j.applthermaleng.2016.06.132. 5. Liu, X.; Liu, C.; Zhang, Z.; Chen, L.; Hou, Y. Experimental Study on the Performance of Water Source Trans-Critical CO2 Heat Pump Water Heater. Energies 2017, 10, 810. doi:10.3390/en10060810. 6. Zhang, Z.; Dong, X.; Ren, Z.; Lai, T.; Hou, Y. Influence of Refrigerant Charge Amount and EEV Opening on the Performance of a Transcritical CO2 Heat Pump Water Heater. Energies 2017, 10, 1521. doi:10.3390/en10101521. 7. Hu, B.; Li, Y.; Cao, F.; Xing, Z. Extremum seeking control of COP optimization for air-source transcritical CO2 heat pump water heater system. Appl. Energy 2015, 147, 361–372. doi:10.1016/j.apenergy.2015.03.010. 8. Ohkura, M.; Yokoyama, R.; Nakamata, T.; Wakui, T. Numerical analysis on performance enhancement of a CO2 heat pump water heating system by extracting tepid water. Energy 2015, 87, 435–447. doi:10.1016/j.energy.2015.05.013. 9. Elguezabal, P.; Garay, R.; Martin, K. Experimentation under real performing conditions of a highly integrable unglazed solar collector into a building façade. Energy Procedia 2017, 122, 775–780. doi:10.1016/j.egypro.2017.07.395. 10. Torregrosa-Jaime, B.; González, B.; Martínez, P.J.; Payá-Ballester, G. Analysis of the Operation of an Aerothermal Heat Pump in a Residential Building Using Building Information Modelling. Energies 2018, 11, 1642. doi:10.3390/en11071642. 11. Salazar-Herrán, E.; Martín-Escudero, K.; López-Paniagua, I.; Jiménez-Álvaro, A.; Romero-Antón, N. Caracterización experimental de una bomba de calor acoplada a una fachada ventilada para producción de agua caliente. In Proceedings of the Libro de Actas del I Congreso sobre Ingeniería Energética, iENER’18, Madrid, Spain, 27–28 June 2018; Fundación de la Energía de la Comunidad de Madrid: Madrid, Spain, 2018; ISBN 978-84-09-02707-1.PDF Image | Comparison of Transcritical CO2 and Conventional Refrigerant Heat Pump
PDF Search Title:
Comparison of Transcritical CO2 and Conventional Refrigerant Heat PumpOriginal File Name Searched:
energies-12-00479.pdfDIY PDF Search: Google It | Yahoo | Bing
CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
Heat Pumps CO2 ORC Heat Pump System Platform More Info
| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |