scholarly journals Calculation methodology of the energy indicators of an self-contained energy complex including gas turbine plants, wind-driven power plant and electric storage cell

2020 ◽  
Vol 22 (3) ◽  
pp. 36-43
Author(s):  
Y. E. Nikolaev ◽  
V. N. Osipov ◽  
V. Y. Ignatov
Keyword(s):  
Power Plant ◽  
Gas Turbine ◽  
Wind Power ◽  
Heat Load ◽  
Waste Heat ◽  
Electric Energy ◽  
Wind Power Plant ◽  
Electric Load ◽  
Waste Heat Boiler ◽  
Storage Cell

To supply small cities with electric and thermal energy it is proposed to create selfcontained energy complex based on gas turbine plants (GTP), wind generators and electric storage cell. A scheme for the joint operation of these plants is offered, a methodology for calculating the quantitative characteristics of a wind power plant, gas turbines and electric storage cell is developed. Electric storage cell provide coverage the peak portion of the daily electrical load curve. The heat load is ensured by the operation of the waste-heat boiler and the peak boiler. Using the example of a power complex with an electric load of 5 MW and a heat load of 17.5 MW, the generation of electric energy by wind driven power plant and gas turbine plants, the supply of electric energy from electric storage cell, the heat loads of the waste-heat boiler and peak boiler by months of the year are calculated. When the power share of the wind power plant is 0.2, the electric storage cell provide for an annual period from 5.2 to 10.7 % of the daily demand of the electric load schedule. The electric power of the gas turbine plant in winter is reduced to 70 % of the maximum load of the consumer, in summer - up to 55 %. An increase in the relative share of the power of a WDPP reduces the electric capacity of a gas turbine plants, its cost, while the cost of electric storage cell increases.

scholarly journals Performance Evaluation of a Combined Heat and Power Plant in the Niger Delta of Nigeria

2019 ◽  
Vol 4 (4) ◽  
pp. 17-23
Author(s):  
Barikuura Gbonee ◽  
Barinyima Nkoi ◽  
John Sodiki
Keyword(s):  
Power Plant ◽  
Gas Turbine ◽  
Thermal Efficiency ◽  
Heat Balance ◽  
Niger Delta ◽  
Heat Recovery ◽  
Waste Heat ◽  
Combined Heat And Power ◽  
Steam Flow ◽  
Waste Heat Boiler

This research presents the performance assessment of a combined heat and power plant operating in the Niger Delta region of Nigeria. The main focus is to evaluate the performance parameters of the gas turbine unit and the waste heat recovery generator section of the combined-heat-and-power plant. Data were gathered from the manufacturer’s manual, field and panel operator’s log sheets and the human machine interface (HMI) monitoring screen. The standard thermodynamic equations were used to determine the appropriate parameters of the various components of the gas turbine power plant as well as that of the heat exchangers of the heat recovery steam generator (HRSG). The outcome of all analysis indicated that for every 10C rise in ambient temperature of the compressor air intake there is an average of 0.146MW drop in the gas turbine power output, a fall of about 0.176% in the thermal efficiency of the plant, a decrease of about 2.46% in the combined-cycle thermal efficiency and an increase of about 0.0323 Kg/Kwh in specific fuel consumption of the plant. In evaluating the performance of the Waste Heat Boiler (WHB), the principle of heat balance above pinch was applied to a single steam pressure HRSG exhaust gas/steam temperature profile versus exhaust heat flow. Hence, the evaporative capacity (steam flow) of the HRSG was computed from the total heat transfer in the super-heaters and evaporator tubes using heat balance above pinch. The analysis revealed that the equivalent evaporation, evaporative capacity (steam flow) and the HRSG thermal efficiency depends on the heat exchanger’s heat load and its effective maintenance.

scholarly journals Determination of the Design Characteristics of Heat Exchange Equipment for Heating Network Water of a Cogeneration Gas Turbine Unit with a Change in the Heat Load of Consumers in Regions with Different Climatic Conditions

2021 ◽  
Vol 2096 (1) ◽  
pp. 012015
Author(s):  
A M Kler ◽  
E L Stepanova ◽  
P V Zharkov
Keyword(s):  
Gas Turbine ◽  
Heat Load ◽  
Parametric Optimization ◽  
Waste Heat ◽  
Climatic Conditions ◽  
Waste Heat Boiler ◽  
Gas Turbine Unit ◽  
Network Water ◽  
Design Characteristics

Abstract Optimization studies of the dependence of fuel consumption on changes in the heat load of consumers in regions with different climatic conditions and taking into account the determination of the design characteristics of the equipment for heating network water of a cogeneration GTU were carried out. The GTU has two fuel combustion chambers, a waste-heat boiler and a contact heat exchanger for heating of feeding network water. Schematic-parametric optimization studies were carried out on the design mathematical model of the GTU. The analysis of the data of the circuit-parametric optimization made it possible to conclude that for the operating modes of the gas turbine plant with a higher thermal load, it is advantageous to slightly increase the heating surface area of the heater of feeding network water, the cost of materials for the manufacture of which is lower than for the waste heat boiler. This technical solution provided a relatively low increase in specific capital investments with full provision of consumers with electric and thermal energy. The data obtained in this work can be used to select the optimal technical solutions that ensure competitiveness in the operation of a cogeneration gas turbine unit in regions with different climatic characteristics.

Rancang Bangun Square Wave Full-Bridge Inverter Untuk Pembangkit Listrik Tenaga Angin Mikro

2019 ◽  
Vol 9 (01) ◽  
pp. 18-23
Author(s):  
Didi Istardi ◽  
Agus Wirabowo
Keyword(s):  
Energy Storage ◽  
Power Plant ◽  
Wind Power ◽  
Direct Current ◽  
Electric Energy ◽  
Storage Battery ◽  
Wind Power Plant ◽  
Ac Current ◽  
Inverter Circuit ◽  
Dc Current

The simple principle of wind power plant is use wind as main exciter to rotate the turbine. The turbine convert wind to electric energy. The output signal is alternating (AC) current. This current was changed to direct current (DC) by rectifier circuit. The DC current was used as charge the energy storage, battery. Next step, the DC current from battery convert to AC current using inverter circuit. The result of inverter shows that the error is 20% with 240V no load.

scholarly journals Study of the Decentralized Electrification by a Micro-Wind Power Plant: Case of Ahouandji Locality in Southern Benin

2021 ◽  
Vol 1 ◽  
Author(s):  
Hagninou Elagnon Venance Donnou ◽  
Gabin Koto N’Gobi ◽  
Hilaire Kougbéagbédè ◽  
Germain Hounmenou ◽  
Aristide Barthélémy Akpo ◽  
...  
Keyword(s):  
Power Plant ◽  
Wind Power ◽  
Electric Energy ◽  
Electrical Energy ◽  
Well Being ◽  
Maximum Energy ◽  
Wind Power Plant ◽  
Selling Price ◽  
Economic Study ◽  
Daily Production

Access to energy is a major challenge for the socio-economic well-being of populations. In Benin, the electric energy sector is characterized by a low rate of access to energy in rural area (6.6% in 2017) and dependence on the outside at 40%. In the village of Ahouandji (Ouidah commune) located on the coast of Benin and far from the conventional network, the surface winds are regular and permanent. However, this wind resource is untapped despite the unavailability of electrical energy. To cope with this difficulty, this study therefore addresses the design and sizing of a micro-wind power plant to supply the region. Wind data at 10 m above the ground recorded over the period January 1981 to December 2014 by the Agency for the Safety of Air Navigation in Africa (ASECNA) were used. Based on the socio-economic study of the locality and the statistical study of the winds by the Weibull distribution and the power law, the sizing of the wind power plant components was carried out. The economic study of the system then made it possible to assess the profitability of the project. It emerges from this study that at 25 m above the ground the Weibull shape parameter is estimated at 2.94 and the scale parameter at 6.07 m/s. The most frequent speed is estimated at 5 m/s and the one giving the maximum energy at 10.2 m/s. The micro-power plant is made up of two wind turbines with a nominal power of 29.7 kW for a daily production estimated at 355 kWh, a three-phase converter rated at 30 kW, 06 inverters/chargers with a power of 11.5 kW and 120 batteries (3000Ah/2V). The selling price of kilowatt-hour estimated at 0.17 euro/kWh is quite competitive. The establishment of this micro-wind power plant is therefore an asset for these rural populations.

scholarly journals Selection of design structure and method of energy transformation in wind power plant

2019 ◽  
Vol 298 ◽  
pp. 00124
Author(s):  
Andrey Pushkarev ◽  
Dmitriy Khvorenkov ◽  
Olga Varfolomeeva ◽  
Mikhail Dyagelev ◽  
Ivan Pushkarev
Keyword(s):  
Wind Speed ◽  
Power Plant ◽  
Wind Power ◽  
High Efficiency ◽  
Electric Energy ◽  
Spin Axis ◽  
Wind Power Plant ◽  
Friction Forces ◽  
Wind Speeds ◽  
Design Structure

The purpose of the work is to select the design concept of the wind power plant and the method of transformation of mechanical wind energy into electric energy depending on the wind speed in the given area. In order to solve the first task, it is proposed to approximate the distribution of wind speed with the help of the Raleigh Law, to use incomplete gamma functions and to compare the average annual power of wind plants with the vertical and horizontal spin axis. At low wind speeds dependence of wind plant mass with vertical spin axis with different types of generators is analyzed. The multiplication unit design is selected. Friction forces are determined in planetary multiplication unit having high efficiency. The effect of these forces on wind power plant efficiency is analyzed.

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