Dynamic modeling and simulation of a solar direct steam-generating system

Abstract

SUMMARYA dynamic model of solar parabolic trough collectors has been developed and solved by explicit Euler's method to predigest partial differential equations to ordinary differentials in this paper. Different working conditions of the collector structure and thermal parameters have been considered in the model. The simulated results are validated using the selected real test data on typical summer and winter days, and the steam-generating process from unsaturated water to superheated steam has been studied in the startup simulation. The disturbance analysis validates the model's dynamic responses and confirms the relations between output steam characters and solar radiation, inlet water temperature, flow rate and collectors' area. The results indicate the possible demarcation point of superheated steam generating in different working conditions. Therefore, the model can be used to analyze the performance of the solar direct steamgenerating system.

Thermodynamic performance evaluation of solar and other thermal power generation systems: A review

“…They found that depending on the live steam parameters a reheat is necessary within the power block. Yan et al [55] presented a dynamic model of solar parabolic trough collectors using explicit Euler's method. Different working conditions of the collector structure and thermal parameters have been considered in the model.…”

Development and experimental investigation of a compound parabolic concentrator

“…Yan et al [10] developed a dynamic model of solar parabolic trough collectors applied as direct steam generation systems. The model was solved by an explicit Euler's method and considered different working conditions and thermal parameters.…”

Performance comparison of two low-CO 2 emission solar/methanol hybrid combined cycle power systems

“…Comparing this hybrid with a modern steam cycle that uses only fossil fuel at 45% efficiency, SSPRE thus reduces the fossil fuel consumption and associated CO 2 emissions by half. Another example is the Solar Aide Power Generation (SAPG) system, in which solar heat is used to replace steam extraction from the turbine for feedwater heating in a regenerative Rankine plant [6][7][8]. With the same fossil fuel input, this hybrid cycle was predicted to achieve higher power output, by up to 30%, because of the resulting increase in the turbine working fluid mass flow rate.…”