Abdulrahman Almutairi

Exergetic and sustainability analysis of an intercooled gas turbine cogeneration plant with reverse osmosis desalination system

AbstractIn this study, an advanced cogeneration plant based on a 100-MW aeroderivative intercooled gas turbine (ICGT) engine and large two-pass reverse osmosis (RO) desalination system is analyzed ...

Exergetic and Environmental Analysis of 100 MW Intercooled Gas Turbine Engine

This chapter presents energy, exergy, and environmental analysis of 100 MW intercooled gas turbine engine inspired from LMS 100 GE, a state-of-the-art aeroderivative gas turbine engine, which offers the highest simple-cycle thermal efficiency today. The proposed models have been modeled using a software package called IPSEpro and validated with manufacturer’s published data. In fact, most gas turbine engines are designed using energetic performance criteria based on the first law of thermodynamics. Exergetic performance criteria is based on the first and second laws of thermodynamics (Yilmazoglu and Amirabedin, 2011), which when combined are considered more efficient in energy-resource use owing to the way in which locations, magnitudes, and types of wastes and losses in the system are determined. The performance of gas turbine engine was investigated using different loads and ambient temperatures on two configurations. The first include intercooling gas turbine (ICGT) system (Case I), whereas the second is simple-cycle gas turbine (SCGT) engine (Case II). Results show that intercooler system improves gas turbine performance, whereas they have negative impact on combustion chamber due to reduction in inlet temperatures. Load reduction causes an adverse effect on performance, whereas ambient temperature reduction causes the reverse. From an environmental perspective, the present study has developed a new exergetic–environmental indicator to relate the efficiency with nature of exhaust gases in order to measure environmental impacts and increase the lifespan of energy resources. All environmental indicators show ICGT as more appropriate to environment in comparison to SCGT. Furthermore, it achieved the lowest level of CO2 emissions per KWh.

Heat transfer characteristics of an orthogonal jet impinging on roughened flat plate

The purpose of this research paper is to investigate the effect of surface roughness on heat transfer. This was achieved by investigating the heat transfer in two cases: a smooth, horizontal surface (the baseline case) and the same surface with a roughness element added to it. The roughness elements took the shape of hemispherical pin-fin. The roughness element was further investigated by varying its height and width (e by e) to study their impact on the average Nu. Results are presented in the form of average Nusselt number within and beyond the stagnation region. Each roughness element was arranged in a circle concentric with the geometric centre (i.e. centre of jet) with a radius of one and a half jet diameters (R/D = 1.5) to keep it within the stagnation region. The jet diameter kept constant for all simulations (D=13.5mm) where the plane was located at H/D = 6 below the jet, for all the tests with a jet Reynolds number of 20,000 and jet temperature is 20°. The spherical pin-fin was tested for six different heights (e) from 0.25 mm to 1.50 mm in incremental steps of 0.25 mm for jet angle (α) of 90°. This research investigated how the roughness geometry impacted on the average Nusselt number.

Exergetic, exergoeconomic and exergoenvironmental analysis of intercooled gas turbine engine

Exergetic and exergoeconomic and exergoenvironmental analyses have been performed for an advanced aero-derivative intercooled gas turbine engine. The proposed system was modelled using the IPSEpro software package and validated using manufacturer’s published data. The exergoeconomic model evaluates the cost-effectiveness of the gas turbine engine based on the Specific Exergy Costing [SPECO] method. The CO2 emissions per KWh were estimated using a generic combustor model, HEPHAESTUS, developed at Cranfield University. It is well known that the exergetic analysis can determine the magnitudes, locations and types of losses within an energy system. The effect of load and ambient temperature variations on gas turbine performance were investigated for two different configurations. The first system, Case-I, was a simple gas turbine (SCGT) engine, and the second, Case-II, an intercooling gas turbine (ICGT) system. The latter enhances gas turbine efficiency but, at the same time, has an adverse effect on the combustion chamber due to reduced compressed air temperature. It was confirmed that full load and low ambient temperature are preferable due to the low waste exergy. The unit exergy cost rate for both SCGT and ICGT have been calculated as 8.59 and 8.32 US

Energetic and exergetic analysis of cogeneration power combined cycle and ME-TVC-MED water desalination plant: Part-1 operation and performance

/GJ respectively. The exergoenvironmental results show the ICGT achieved lower emission levels and is more environmentally friendly than the SCGT.