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Analysis of two-stage high-temperature heat pump cycles for steam generation using hydrocarbons as refrigerants.
Number: 1226
Author(s) : HASSAN A., PAYÁ J., NAVARRO-PERIS E.
Summary
This paper investigates the thermodynamic feasibility of a high-temperature heat pump (HTHP) working with natural refrigerants to generate superheated steam at 150 °C. Different two-stage configurations have been implemented and compared for five different refrigerants. The configurations that utilize the flash gas tank (FGT) and economizer (ECO) show the highest and similar performance compared with the intercooler (INTC) configuration. Dry refrigerants Isopentane and 1-Pentene are the best candidates in this study. By utilizing the HTHP with FGT, they can produce superheated steam at 150 °C and 175 kPa by recovering the waste heat at 40 °C with an average heating coefficient of performance (COP) of 1.88. This value increased to 2.6 and 3.31 by increasing the source temperature to 60 and 80 °C, respectively. The isentropic refrigerant Butene has the lowest COP values, compared with others, but yields very high volumetric heating capacity (VHC) values that reach 5.8 MJ·m-3.
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Details
- Original title: Analysis of two-stage high-temperature heat pump cycles for steam generation using hydrocarbons as refrigerants.
- Record ID : 30032732
- Languages: English
- Source: 16th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2024). Proceedings. University of Maryland, College Park, Maryland, USA, August 11-14 2024
- Publication date: 2024/08
- DOI: http://dx.doi.org/10.18462/iir.gl2024.1226
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