Solar feed water heating feasibility for a conventional steam power plant

Alam, Ahsan; Siddiqui, Mubashir Ali; Rehman, Naveed ur

doi:10.1007/s12206-017-0644-9

Cited by 11 publications

(1 citation statement)

References 18 publications

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“…Mohammadi et al 10 did an exergy‐economic investigation on the replacement of feedwater heaters of Rankine cycles with PTCs and concluded that by this measure the power generation rate of the plant may increases by 8.14% while the payback period of that is only 1.5 years. Alam et al 11 investigated the feasibility of feedwater heating by solar energy for conventional steam power plants and found out that the use of their proposed solar system for higher pressure feedwater heater is more economically realistic than the lower pressure feedwater heater. Pierce 12 studied the effectiveness of feedwater solar preheating by PTCs for a case study in South Africa and revealed that the total annual electricity production of the plant will increase by 25% in this way.…”

Section: Introductionmentioning

confidence: 99%

Energy performance enhancement of solar thermal power plants by solar parabolic trough collectors and evacuated tube collectors ‐based preheating units

Alsagri

2020

Int J Energy Res

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Summary Solar steam power plant is the dominant technology in the category of solar thermal power systems. In steam power cycles, there is usually a couple of steam lines, extracted from medium‐pressure and low‐pressure turbines, to preheat the working fluid before the boiler. This although leads to an increase in the energy efficiency of the cycle, reduces the contribution of the turbine proportionally. Therefore, finding an alternative method of preheating the working fluid would be effective in further enhancement of the efficiency of the system. In this study, the feasibility of using solar collectors for the preheating process in a solar steam power plant is investigated. For this, parabolic trough solar collectors and evacuated tube solar collectors based on a wide range of different scenarios and configurations are employed. The plant is designed, sized and thermodynamically analyzed for a case study in Saudi Arabia where there is a large solar irradiation potential over the year. The results of the simulations show that, among all the considered scenarios, a power cycle aided by a set of parabolic trough collectors as the preheating unit is the best choice technically. This configuration leads to about 23% increased power generation rate and 6.5% efficiency enhancement compared to the conventional design of the plant.

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Section: Introductionmentioning

confidence: 99%