Analysis of a novel solar energy-powered Rankine cycle for combined power and heat generation using supercritical carbon dioxide

Zhang, X.R.; Yamaguchi, Hiroshi; Uneno, Daisuke; Fujima, Katsumi; Enomoto, Masatoshi; Sawada, N.

doi:10.1016/j.renene.2005.09.024

Cited by 163 publications

(63 citation statements)

References 12 publications

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“…Due to its unique properties and the relatively easy critical conditions which need to be obtained, SC-CO 2 fluid has been widely studied and used in numerous fields [3][4][5][6]. In recent years, SC-CO 2 fluid, which has many advantages for improving the rates of penetration and single well recovery, has been applied in the field of drilling and completion engineering, especially for the exploitation of unconventional reservoirs [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Effects of a Nano-Silica Additive on the Rock Erosion Characteristics of a SC-CO2 Jet under Various Operating Conditions

et al. 2017

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Abstract:In order to improve the erosion capacity of a supercritical carbon dioxide (SC-CO 2 ) jet, the influence of a nano-silica additive on the rock erosion characteristics was experimentally investigated. By impinging the SC-CO 2 jets with nano-silica mass fractions of 0 wt % (pure SC-CO 2 jet), 3 wt %, 6 wt %, 9 wt %, 12 wt %, 15 wt %, and 18 wt % on specimens of red sandstone, the erosion volumes under various operating conditions were measured and analyzed. Results show that an appropriate amount of nano-silica additive can greatly enhance the erosion ability of a SC-CO 2 jet. The effect on the erosion ability largely depends on the operating conditions. For instance, when the other conditions are fixed, 6 wt %, 9 wt %, 12 wt %, and 15 wt % were the optimum mass fractions, successively, with the inlet pressure increasing from 30 MPa to 60 MPa. With the increase in ambient pressure, the optimum mass fraction is unchanged under the constant inlet pressure, while it increases under the constant pressure drop. Additionally, the optimum mass fraction decreases when the fluid temperature increases. In addition, the optimal standoff distances are about five times the nozzle diameter of the nano-silica SC-CO 2 jet, and three times for the pure jet. This research provides a new method for effectively enhancing the rock erosion performance of a SC-CO 2 jet.

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Section: Introductionmentioning

confidence: 99%

Effects of a Nano-Silica Additive on the Rock Erosion Characteristics of a SC-CO2 Jet under Various Operating Conditions

et al. 2017

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“…The pressure drop inside the collector tubes and heat transfer coefficients are determined based on generalized equations reported in the literature [4,[7][8][9]. As a transcritical cycle deals with both the two-phase and the supercritical vapor zone, the working fluid CO 2 enters the collector tubes as two-phase mixtures and leaves the collector outlet as superheated vapor.…”

Section: Solar Collector/evaporator Modelmentioning

confidence: 99%

“…In the single phase vapor flow heat transfer coefficient is calculated using the Gnielinski relation [9] and pressure drop is determined by the usual Darcy-Weisback equation. The temperature of the CO 2 fluid inside the U-tube is determined by Zhang et al [4] using a finite volume approach.…”

Section: Solar Collector/evaporator Modelmentioning

confidence: 99%

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Performance study on solar assisted heat pump water heater using CO2 in a transcritical cycle

Islam

Sumathy

Gong

et al. 2012

REPQJ

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This study reports the numerical analyses of a CO 2 transcritical cycle on solar assisted heat pump water heating system in which evacuated tube U-pipe solar collector is utilized as an evaporator. This simulation model can predict operating characteristics for moderate meteorological conditions of North Dakota. The main purpose of this work is to simulate the overall performance of the heat pump cycle by varying compressor speed. From the analysis the coefficient of performance (COP) value is predicted from 1.5 -2.8 with three different average solar insolation. The results showed that the performance of the system significantly influenced by the compressor speed and solar irradiation. This study also calculated the instantaneous collector efficiency and found in the range of 50 -55%.

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“…The Maximum temperatures for subcritical and supercritical cycles were 308.6 °C and 342.1 °C respectively. Zhang et al (2006) analyzed a novel solar energy-powered Rankine cycle for combined power and heat generation using supercritical carbon dioxide. Results show higher efficiency than conventional Rankine cycle with water at maximum temperatures between 32 ºC and 177.4 ºC but the efficiency is still low (less than 12%)) to be proper for practical power plants.…”

Section: Orcs At Supercritical Regionmentioning

confidence: 99%

Exergoeconomic Analysis of Solar Organic Rankine Cycle for Geothermal Air Conditioned Net Zero Energy Buildings

Rayegan¹

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Analysis of a novel solar energy-powered Rankine cycle for combined power and heat generation using supercritical carbon dioxide

Cited by 163 publications

References 12 publications

Effects of a Nano-Silica Additive on the Rock Erosion Characteristics of a SC-CO2 Jet under Various Operating Conditions

Effects of a Nano-Silica Additive on the Rock Erosion Characteristics of a SC-CO2 Jet under Various Operating Conditions

Performance study on solar assisted heat pump water heater using CO2 in a transcritical cycle

Exergoeconomic Analysis of Solar Organic Rankine Cycle for Geothermal Air Conditioned Net Zero Energy Buildings

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