Micro Gas-Turbine Design for Small-Scale Hybrid Solar Power Plants

Abstract

Hybrid solar micro gas-turbines are a promising technology for supplying controllable low-carbon electricity in off-grid regions. A thermoeconomic model of three different hybrid micro gas-turbine power plant layouts has been developed, allowing their environmental and economic performance to be analyzed. In terms of receiver design, it was shown that the pressure drop is a key criterion. However, for recuperated layouts, the combined pressure drop of the recuperator and receiver is more important. In terms of both electricity costs and carbon emissions, the internally-fired recuperated micro gasturbine was shown to be the most promising solution of the three configurations evaluated. Compared to competing diesel generators, the electricity costs from hybrid solar units are between 10% and 43% lower, while specific CO 2 emissions are reduced by 20-35%. Downloaded From: http://gasturbinespower.asmedigitalcollection.asme.org/ on 05/24/2015 Terms of Use: http://asme.org/terms

Solar Hybrid Micro Gas Turbine Based on Turbocharger

“…A significant increase of energy production can be achieved with a relatively small increase of LEC (e.g., a 9.5% increase in energy is achieved with 1.8% increase of LEC). The results presented here show that such a configuration may be promising, as economic results for solar hybrid MGT of 100 kW show that the LECs vary in the range of 250-700 $/MWh (according to the chosen set up) [10], while the LEC of a typical diesel generator is about 500 $/MWh [10].…”

“…results for solar hybrid MGT of 100 kW show that the LECs vary in the range of 250-700 $/MWh (according to the chosen set up) [10], while the LEC of a typical diesel generator is about 500 $/MWh [10].…”

“…Design specifications for the T/C are summarized in Table 1. Ducts, and receiver and heating elements (burner) are assumed to add a pressure drop of 2% each at the design point [10,13]. The shaft/generator is assumed to have efficiency of 98% [24,25].…”

“…The compressed air is fed into the receiver to be heated, before its entrance into the combustion chamber. Several European Union (EU) funded projects [7][8][9] and research works study this option [10][11][12][13]. This technology is in experimental stage [7][8][9].…”

Development and Validation of a Thermo-Economic Model for Design Optimisation and Off-Design Performance Evaluation of a Pure Solar Microturbine

“…Hence, a centrifugal compressor design with stationary casing, impeller, stationary vaneless diffuser and volute has been adopted for this study. The design and off-design performance evaluation have been performed using a one-dimensional model based on mass, momentum and energy conservation principles as given in Equations (2) and 3.…”