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Development of Supercritical CO2 Solar Rankine Cycle System

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Energy Solutions to Combat Global Warming

Part of the book series: Lecture Notes in Energy ((LNEN,volume 33))

Abstract

A supercritical CO2 solar Rankine cycle system, an innovation of a new concept for global warming solution by using CO2 as a natural working fluid is introduced and the development of the novel system is presented. The system consists of solar collectors, power generation turbine, heat exchangers, and mechanical feed pump (or a novel concept the so-called thermally driven pump). This system is particularly characterized by CO2 transcritical Rankine cycle with newly developed system elements, which include evacuated tube solar collector, turbine, gas–liquid heat exchanger, feed pump and other flow regulating elements. In this article much attention is given to the thermally driven pump, which shows promising performance data, when replacing for a mechanical feed pump in the system. Preliminary results gained from a prototype system installed for an actual operation under extracting solar thermal energy, producing electric and heat energy, indicate that the system has more advantages against a fossil fueled cogeneration system. The developed system represents highly potential solution and idea to solve the global warming crisis, and also can give a clue to a path of future energy creation technique for green energy resources.

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Abbreviations

A :

Area (m2)

d :

Diameter (m)

h :

Specific enthalpy (J/kg)

I t :

Total solar radiation during the test time period per day (MJ)

L :

Tube length (m)

λ :

Thermal conductivity for fluid (W/(m-K))

M e :

Reduction of CO2 emission per year (kg)

M p :

Saving of petroleum per year (L)

Nu :

Nusselt number (–)

Nu x :

Local Nusselt number (–)

m :

Mass flow rate (kg/s)

p :

Pressure (MPa)

Pr :

Prandtl number (–)

Q in :

Heat quantity absorbed (W)

Q out :

Heat recovery (W)

q ct :

Total heat quantity collected in the collector during the test time period per day (MJ)

q i :

Incident solar flux (W/m2)

q :

Heat flux (W/m2)

ρ :

Density (kg/m3)

r :

Radial vertical coordinator (m)

r 0 :

Tube radial (m)

R :

Dimension less radial coordinator; R = r/r 0 (–)

Re:

Reynold number (–)

T :

Temperature (°C)

T a :

Ambient temperature (°C)

T f :

Average collector inlet fluid temperature (°C)

ν :

Kinematic viscosity (m2/s)

W power :

Power generation (W)

x :

Axial coordinate (m)

X :

Temperature profile; X = x/L (–)

η :

Efficiency(%)

η collector :

Collector efficiency (%)

η power :

Power generation efficiency (%)

η heat :

Heat recovery efficiency (%)

η th :

Thermal efficiency (%)

η gen :

Turbine efficiency (%)

1–5:

Positions shown in Fig. 1

P :

Pump

T :

Turbine

s :

Surface area of evacuated tube solar collector

CO2 :

Mass flow rate of CO2

CFC:

Chlorofluorocarbon

GWP:

Global warming potential

OPD:

Ozone depletion potential

PV:

Photovoltaic

SUS:

Grade stainless steel

USD:

United States Dollar

CO2 :

Carbon dioxide

NH3 :

Ammonia

H2O:

Water

C3H8 :

Propane

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Acknowledgments

This study was supported by Japan Science and Technology Agency (JST) in Super cluster program.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Energy Conversion Research Center, Doshisha University, Tatara, Kyotanabe-Shi, Kyoto Prefecture, 610-0321, Japan

    Hiroshi Yamaguchi & Xin-Rong Zhang

Authors
  1. Hiroshi Yamaguchi
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  2. Xin-Rong Zhang
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Corresponding author

Correspondence to Hiroshi Yamaguchi .

Editor information

Editors and Affiliations

  1. College of Engineering, Peking University, Beijing, China

    XinRong Zhang

  2. Faculty of Engineering and Applied Science, Department of Mechanical Engineering, University of Ontario, Oshawa, Ontario, Canada

    Ibrahim Dincer

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Yamaguchi, H., Zhang, XR. (2017). Development of Supercritical CO2 Solar Rankine Cycle System. In: Zhang, X., Dincer, I. (eds) Energy Solutions to Combat Global Warming. Lecture Notes in Energy, vol 33. Springer, Cham. https://doi.org/10.1007/978-3-319-26950-4_1

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  • DOI: https://doi.org/10.1007/978-3-319-26950-4_1

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-26948-1

  • Online ISBN: 978-3-319-26950-4

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