Experimental study on heat transfer of supercritical carbon dioxide in a long silica-based porous-media tube

Hsieh, Jui‐Ching; Lin, David T.W.; Lee, Bo-Heng; Chung, Ming-Che

doi:10.1007/s00231-016-1874-6

Cited by 5 publications

(4 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7(b)). In other words, U eva decreased with increasing heat source temperature because of the decrease in the specific heat of the working fluid far from the pseudocritical temperature [25]. For the ORC system, the working fluid pump supplied pressure in the evaporator.…”

Section: Resultsmentioning

confidence: 99%

Design and preliminary results of a 20-kW transcritical organic Rankine cycle with a screw expander for low-grade waste heat recovery

Hsieh

Wang

et al. 2017

Applied Thermal Engineering

Self Cite

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

Design and preliminary results of a 20-kW transcritical organic Rankine cycle with a screw expander for low-grade waste heat recovery

Hsieh

Wang

et al. 2017

Applied Thermal Engineering

Self Cite

View full text Add to dashboard Cite

“…The heat transfer coefficient of supercritical CO 2 can be determined using the logarithmic mean temperature difference approach, as presented in the following equations:

T_{m} = \frac{Δ T_{in} - Δ T_{out}}{\ln (\frac{Δ T_{in}}{Δ T_{out}})}

Δ T_{in} = T_{w, 1} - T_{in}

Δ T_{out} = T_{w, 10} - T_{out}

h = \frac{Q}{A ∙ T_{m}}

where h represents the test section's mean heat transfer coefficient. To comprehend phenomena related to heat transfer and fluid flow, the wall temperature and pressure and temperature of supercritical fluid were measured.…”

Section: Experimental Apparatus and Thermodynamic Analysis Methodologymentioning

confidence: 99%

“…Studies have indicated that fast variations in fluid physical properties close to the pseudocritical and critical points result in a maximal heat transfer coefficient. In particular, heat transfer‐related phenomena are affected by buoyancy in vertical and horizontal tubes .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of heat extraction optimization with supercritical carbon dioxide on transcritical power cycle

Hsieh

2020

Int J Energy Res

View full text Add to dashboard Cite

An experimental and thermodynamic analysis was conducted to explore the match in operating conditions for the heat extraction of supercritical CO 2 and the CO 2 transcritical organic Rankine cycle (CTORC). The results revealed that in the optimal conditions of the experiment, the difference between the pseudocritical temperature and the inlet temperature (ΔT pc − in ) was <10 K and T b /T pc (ratio of the bulk temperature to the pseudocritical temperature) was ≤1 (ideal scenario: T b /T pc = 1). Furthermore, the heat transfer and fluid flow of CO 2 as well as the CTORC system performance at the optimal T b /T pc could be simultaneously improved with respect to those at ΔT pc − in < 10 K.The peak values of system efficiency for the inlet temperature of the expander of 100 C and 150 C were 5.1% at 12.5 MPa and 8.0% at 17 MPa, with the corresponding T b /T pc being 1.24 (T pc of 55.9 C) and 1.45 (T pc of 70 C), respectively. Consequently, to simultaneously improve the heat transfer, fluid flow and system efficiency, T pc of the supercritical CO 2 in the CTORC should be sufficiently high to approach half the inlet temperature of the expander for obtaining an optimal T b /T pc at a low condensing temperature. K E Y W O R D Sbuoyancy, enhanced geothermal system, heat transfer, pressure drop, supercritical CO 2 , thermodynamic analysis, transcritical organic Rankine cycle

show abstract

Recent Development of Heat Transfer and Fluid Flow of Supercritical CO2 in Tubes: Mechanisms and Applications

Zhang,

Shao,

Liu

et al. 2024

J. Therm. Sci.

View full text Add to dashboard Cite

Experimental study on heat transfer of supercritical carbon dioxide in a long silica-based porous-media tube

Cited by 5 publications

References 19 publications

Design and preliminary results of a 20-kW transcritical organic Rankine cycle with a screw expander for low-grade waste heat recovery

Design and preliminary results of a 20-kW transcritical organic Rankine cycle with a screw expander for low-grade waste heat recovery

Effect of heat extraction optimization with supercritical carbon dioxide on transcritical power cycle

Recent Development of Heat Transfer and Fluid Flow of Supercritical CO2 in Tubes: Mechanisms and Applications

Contact Info

Product

Resources

About