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Numerical Analysis of Solar Chimney Design for Power Generation

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Abstract

Solar chimney operates on the principle of natural convection flow. The sizing of the solar chimney and the collector area begins with the natural convection pneuma-static balance of the solar chimney. Solar chimney for power generation will be designed in the following sections. The design approach is to enable different combinations of parameters to be assessed prior to doing rigorous designs requiring sophisticated tools like CFD and Multiphysics software.

Abbreviations

Ac

Tower inner diameter (m)

Acoll

Total collector area (m2)

cf

Blade, transmission and generator efficiency (−)

cp

Air-specific heat capacity (J kg−1 K−1)

D

Tower inner diameter (m)

f

Darcy friction factor (−)

ft

Turbine efficiency or power ratio (−)

G

Solar irradiation rate (Wm2)

g

Gravitational acceleration constant at sea level (ms2)

hc

Solar chimney height (m)

ho

Effective plume-chimney height (m)

hp

Cold inflow penetration depth (m)

L

Characteristic dimension of plume source (m)

\(\dot{M}\)

Air mass flow rate (kg s1)

\(\dot{Q}\)

Heat gained by air in the collector (m)

Ta

Ambient temperature (°C)

To

Hot air temperature in collector and tower(°C)

\(\dot{V}\)

Volumetric flow rate (m3s1)

W

Shaft work (W)

wc

Tower inlet mean velocity (ms1)

wcopt

Optimum tower inlet mean velocity (ms1)

α

Solar irradiation absorption factor of collector (−)

αH

Heat transfer coefficient (Wm2 K1)

β

= αH (Wm−2 K−1)

Δptot

Total pressure drop (Pa)

Δpt

Turbine pressure drop (Pa)

Δpw

Tower wall frictional pressure drop (Pa)

Δpex

Tower exit pressure loss (Pa)

Δpten

Tower entrance pressure loss (Pa)

Δpcen

Collector entrance pressure loss (Pa)

ΔT

Temperature rise in the collector (K)

ηSC

Thermal efficiency of solar chimney (−)

ηSP

Overall efficiency of solar chimney (−)

ηcoll

Collector efficiency (−)

ηwt

Mechanical to electrical transmission efficiency (−)

ρa

Ambient air density (kg m3)

ρo

Hot air density (kg m3)

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Copyright information

© Springer Nature Singapore Pte Ltd. 2021

Authors and Affiliations

  1. 1.Faculty of EngineeringUniversiti Malaysia SabahKota KinabaluMalaysia
  2. 2.Department of Mechatronics EngineeringWorld University of BangladeshDhakaBangladesh

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