Simulation of a pilot solar chimney thermal power generating equipment

Zhou, Xinping; Yang, Jiakuan; Xiao, Bo; Hou, Guoxiang

doi:10.1016/j.renene.2006.07.008

Cited by 102 publications

(37 citation statements)

References 7 publications

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“…Since then many researchers have studied the feasibility of the large scale solar chimney [13,14]. Several pilots of solar chimney have been constructed in the world and their performance has been investigated [15][16][17][18][19]. However, the solar chimney has low conversion efficiency, it compensates for this disadvantage by its cheap, simple technology and low maintenance cost.…”

Section: Introductionmentioning

confidence: 99%

New combination of solar chimney for power generation and seawater desalination

Niroomand

Amidpour

2013

Desalination and Water Treatment

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A B S T R A C TIn this article, a new combination of solar chimney and Humidification-Dehumidification desalination process is introduced. In this system, the air is humidified by injection of water drops into the air flow. Then, the partial of vapors contained in the air is condensed on the outer surface of the cold water tubes. Two mathematical models have been developed for a one-dimensional flow in the solo solar chimney and the integrated system. The performance of the integrated system including power and potable water production is estimated and the results are discussed. Furthermore, it has been demonstrated that increasing in the temperature and mass flow rate of humidifier inlet water would improve the performance of the integrated system. It is found that the increase in water production would cause the decrease in power output. Also, to produce more fresh water, the number of dehumidifier tubes should be increased.

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Section: Introductionmentioning

confidence: 99%

New combination of solar chimney for power generation and seawater desalination

Niroomand

Amidpour

2013

Desalination and Water Treatment

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“…Note that T a is the air temperature outside the tower, not necessarily the temperature of the tower outlet (state point 10), which should be higher. For T 10 , as reported by previous research [21,22], the temperature change across the chimney can assumed to be small, and thus:…”

Section: Updraft Tower Modelmentioning

confidence: 98%

“…Padki and Sherif developed a simple analytical model for a constant-diameter tower by using a momentum balance and assuming the Boussinesq approximation was valid to calculate the air velocity and kinetic energy at the outlet; the power output was assumed equivalent to the kinetic energy. Bernardes et al studied the power output using a model that balanced the pressure potential and theoretical maximum volume flow rate at the tower inlet under a no-load condition to obtain the pressure drop and the volume flow rate at the updraft tower inlet; the same method was adopted by Koonsrisuk and Chitsomboon and Zhou et al [20][21][22]. Pastohr et al calculated the temperature and flow field in the solar updraft tower numerically [23].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of an Updraft Tower System for Dry Cooling in Large-Scale Power Plants

2017

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An updraft tower cooling system is assessed for elimination of water use associated with power plant heat rejection. Heat rejected from the power plant condenser is used to warm the air at the base of an updraft tower; buoyancy-driven air flows through a recuperative turbine inside the tower. The secondary loop, which couples the power plant condenser to a heat exchanger at the tower base, can be configured either as a constant-pressure pump cycle or a vapor compression cycle. The novel use of a compressor can elevate the air temperature in the tower base to increases the turbine power recovery and decrease the power plant condensing temperature. The system feasibility is evaluated by comparing the net power needed to operate the system versus alternative dry cooling schemes. A thermodynamic model coupling all system components is developed for parametric studies and system performance evaluation. The model predicts that constant-pressure pump cycle consumes less power than using a compressor; the extra compression power required for temperature lift is much larger than the gain in turbine power output. The updraft tower system with a pumped secondary loop can allow dry cooling with less power plant efficiency penalty compared to air-cooled condensers.

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“…They disclosed that for a temperature ratio = 2.9 (i.e., the difference between the collector surface temperature and the temperature at the turbine to the difference between the air mass temperature under the roof and the collector surface temperature) an 1000 W of electric power can be generated. The minimum dimension of a practical by a reliable SCPP to assist approximately fifty households in a typical rural setting has been determined to be chimney length = 150 m, height above the collector = chimney radius = 1.5 m. (Zhou, et al, 2007b) developed mathematical model to investigate power generating performance of a SCPP prototype. The steady state simulation returned power outputs for different global solar radiation intensity, collector area and chimney height.…”

Section: Scpp Theoretical Modelsmentioning

confidence: 99%