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Study on CO2 – water printed circuit heat exchanger performance operating under various CO₂ phases for S-CO₂ power cycle application
- Source :
- Applied Thermal Engineering. 113:1536-1546
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- The supercritical CO 2 (S-CO 2 ) power cycle is receiving worldwide attention as one of the promising advanced future electricity generation technologies. Since the S-CO 2 power cycle can achieve high efficiency with simple system configuration, the role of compact heat exchanger becomes more important to achieve smaller system footprint. As an example of successful compact heat exchanger, the printed circuit heat exchanger (PCHE) was recently suggested for the S-CO 2 power cycle application due to the capability of enduring high pressure difference while providing large heat transfer area within a small volume. However, the S-CO 2 precooler operates very close to the critical point of CO 2 where the conventional design methodology may not be suitable due to substantial variation of the thermo-physical properties near the critical point. Thus, in this paper the design and operation issues of PCHE as the precooler are addressed. In this study, the verification of developed PCHE core design code and experimental test results are presented. The test conditions were 26–43 °C and 7.3–8.6 MPa in temperature and pressure, respectively. In terms of non-dimensional numbers, the Reynolds number range is 15,000–100,000 and the Prandtl number range is 2–33. Friction factor and heat transfer correlations were developed with the experimental data and computational analysis for the future PCHE design as a precooler in the S-CO 2 power cycle.
- Subjects :
- Engineering
business.industry
020209 energy
Nuclear engineering
Prandtl number
Plate heat exchanger
Energy Engineering and Power Technology
Mechanical engineering
Reynolds number
02 engineering and technology
021001 nanoscience & nanotechnology
Industrial and Manufacturing Engineering
Supercritical fluid
symbols.namesake
Electricity generation
Heat exchanger
Heat transfer
0202 electrical engineering, electronic engineering, information engineering
symbols
Plate fin heat exchanger
0210 nano-technology
business
Subjects
Details
- ISSN :
- 13594311
- Volume :
- 113
- Database :
- OpenAIRE
- Journal :
- Applied Thermal Engineering
- Accession number :
- edsair.doi...........e680ede2890c3ea921fe294a50d10dd2