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.

scholarly journals A study of the dependence between fuel consumption of a heat gas turbine and variation of heat loading of regional consumers having various climatic conditions taking into account determination of structural characteristics of heat exchanging equipment for grid water heating

2021 ◽  
Vol 25 (4) ◽  
pp. 478-487
Author(s):  
E. L. Stepanova ◽  
P. V. Zharkov
Keyword(s):  
Gas Turbine ◽  
Fuel Consumption ◽  
Parametric Optimization ◽  
Waste Heat ◽  
Structural Characteristics ◽  
Climatic Conditions ◽  
Operating Conditions ◽  
Waste Heat Boiler ◽  
Heat Loading

The aim was to optimize the dependence between fuel consumption and heat loading of regional consumers varied due to climatic conditions, taking into account the determination of structural characteristics of heat exchanging equipment for grid water heating in a heat gas turbine. A heat gas turbine comprising two fuel combustion chambers, a waste-heat boiler and a contact heat exchanger to heat makeup grid water was investigated. Scheme and parametric optimization studies were carried out using a mathematic model of a gas turbine created using a software and hardware system developed at the Department of Heat Power Systems of the Melentiev Energy Systems Institute, Siberian Branch of the Russian Academy of Sciences. Th turbine operating conditions differing in heat loads in four suggested operating regions were studied. It was found that an increase in fuel consumption in the second combustion chamber was 29%– 84% compared to that in the first combustion chamber. This rise was recorded when the turbine heat loading was increasing in the considered regions. Data analysis of the scheme and parametric optimization studies showed that, for operating conditions with a higher heat loading, it seems reasonable to ensure the maximum possible heating of makeup grid water as the loading rises. It is also recommended to slightly increase the heat surface area of the makeup grid water heater whose structural materials are less expensive than in a waste-heat boiler. It was shown that the suggested technical solution slightly increases specific capital investments while fully providing electrical and heat power to consumers. The obtained results can be used to select optimal technical solutions ensuring competitiveness in the operation of a heat gas turbine in regions with various climatic characteristics.

scholarly journals ВИЗНАЧЕННЯ РАЦІОНАЛЬНОГО ТЕПЛОВОГО НАВАНТАЖЕННЯ ГРАДИРЕНЬ ВІДВЕДЕННЯ ТЕПЛОТИ У ПРОЦЕСАХ КОНДИЦІЮВАННЯ ПОВІТРЯ НА ВХОДІ ЕНЕРГОУСТАНОВОК

2018 ◽  
pp. 19-22
Author(s):  
Андрій Миколайович Радченко ◽  
Євген Іванович Трушляков ◽  
Сергій Анатолійович Кантор ◽  
Богдан Сергійович Портной
Keyword(s):  
Gas Turbine ◽  
Heat Load ◽  
Turbine Unit ◽  
Waste Heat ◽  
Cooling System ◽  
Lithium Bromide ◽  
Air Cooling ◽  
Cooling Towers ◽  
Gas Turbine Unit ◽  
Heat Loads

The air conditioning processes (heat-humidity treatment) at the inlet of energy units by heat-energized refrigeration mechanisms with heat removal cooling towers of the cooling system are studied on the example of a gas turbine unit. Two-stage air cooling is considered applying a two-stage combined type heat-energized refrigeration mechanism, which applies the exhaust gas heat of a gas turbine unit and which includes absorption lithium-bromide and refrigerant ejector refrigeration mechanism as steps to convert waste heat into cold. Based on the results of modeling the operation of the cooling complex of a gas turbine unit, data was obtained on current heat loads on heat-energized refrigeration mechanisms and cooling towers in accordance with the climatic conditions of operation with different distribution of project heat loads on the air cooling stages and, accordingly, on the transformation of waste heat into cold. Due to the fact that the heat load on the cooling towers depends on the efficiency of transformation of waste heat into cold (heat coefficients) by absorption lithium-bromide and refrigerant ejector refrigeration mechanisms, a rational distribution of the project heat loads to the absorption and ejector stages of a combined type heat-energized refrigeration mechanisms that provides reduce heat load on cooling towers. It is demonstrated that due to this approach to determining the rational heat load on the cooling towers of the cooling system, which consists of calculation the redistribution of heat load between the  absorption lithium-bromide and refrigerant ejector cooling stages with different efficiency and transformation of waste heat (different heat coefficients) in accordance with current climate conditions, is possible to minimize the number of cooling with a corresponding reduction in capital expenditures on the air conditioning system at the inlet of gas turbine unit

scholarly journals ОЦІНКА ЕФЕКТИВНОСТІ ГЛИБОКОГО ОХОЛОДЖЕННЯ ПОВІТРЯ НА ВХОДІ ГТУ ТЕПЛОВИКОРИСТОВУЮЧИМИ ХОЛОДИЛЬНИМИ МАШИНАМИ

2019 ◽  
pp. 10-14
Author(s):  
Андрій Миколайович Радченко ◽  
Богдан Сергійович Портной ◽  
Сергій Анатолійович Кантор ◽  
Ігор Петрович Єсін
Keyword(s):  
Gas Turbine ◽  
Heat Load ◽  
Turbine Unit ◽  
Waste Heat ◽  
Cooling System ◽  
Mechanical Energy ◽  
Ambient Air ◽  
Air Cooling ◽  
Gas Turbine Unit ◽  
Air Cooling System

Significant fluctuations in the current temperature and relative humidity of the ambient air lead to significant changes in the heat load on the air cooling system at the inlet of the gas turbine unit, which urgently poses the problem of choosing their design heat load, as well as evaluating the efficiency of the air cooling system for a certain period of time. The efficiency of deep air cooling at the inlet of gas turbine units was studied with a change during July 2015–2018 for climatic conditions of operation at the compressor station Krasnopolie, Dnepropetrovsk region (Ukraine). For air cooling, the use of a waste heat recovery chiller, which transforms the heat of exhaust gases of gas turbine units into the cold, has been proposed. The efficiency of air cooling at the inlet of gas turbine units for different temperatures has been analyzed: down to 15 °C – an absorption lithium-bromide chiller, which is used as the first high-temperature stage for pre-cooling of ambient air, and down to 10 °C – a combined absorption-ejector chiller (with using a refrigerant low-temperature air cooler as the second stage of air cooling). The effect of air-cooling was assessed by comparing the increase in the production of mechanical energy as a result of an increase in the power of a gas turbine unit and fuel saved during the month of July for 2015-2018 in accumulating. Deeper air cooling at the inlet of the gas turbine unit to a temperature of 10 °C in a combined absorption-ejector chiller compared to its traditional cooling to 15 °C in an absorption bromine-lithium chiller provides a greater increase in net power and fuel saved. It is shown that due to a slight discrepancy between the results obtained for 2015-2018, a preliminary assessment of the efficiency of air cooling at the inlet of gas turbine plants can be carried out for one year.

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.

Initial Operation and Analysis of a Cogeneration Laboratory

2002 ◽  
Author(s):  
Andrew Banta
Keyword(s):  
Performance Analysis ◽  
Gas Turbine ◽  
Waste Heat ◽  
Gas Turbine Engine ◽  
California State University ◽  
State University ◽  
Absorption Chiller ◽  
Waste Heat Boiler ◽  
Turbine Engine ◽  
Thermodynamic Performance

California State University, Sacramento, has constructed and put into service a stand alone cogeneration laboratory. The major components are a 75 kW gas turbine and generator, a waste heat boiler, and a 10 ton absorption chiller. Initial testing has been completed with efforts concentrating on the gas turbine engine and the absorption chiller. A two part thermodynamic performance analysis procedure has been developed to analyze the cogeneration plant. A first law energy balance around the gas turbine determines the heat into the engine. A Brayton cycle analysis of the gas turbine engine is then compared with the measured performance. While this engine is quite small, this method of analysis gives very consistent results and can be applied to engines of all sizes. Careful attention to details is required to obtain agreement between the calculated and measured outputs; typically they are within 10 to 15 percent. In the second part of the performance analysis experimental operation of the absorption chiller has been compared to that specified by the manufacturer and a theoretical cycle analysis. While the operation is within a few percent of that specified by the manufacturer, there are some interesting differences when it is compared to a theoretical analysis.

scholarly journals The Effects of Steam Injection in Combustion Air on the Thermal Efficiency and the Specific Work Output of a Stationary Gas Turbine Plant

1989 ◽  
Author(s):  
K. S. Varma ◽  
Asgharali I. Khandwawala ◽  
S. A. Asif
Keyword(s):  
Gas Turbine ◽  
Waste Heat ◽  
Steam Injection ◽  
Specific Work ◽  
Work Output ◽  
Waste Heat Boiler ◽  
Turbine Plant ◽  
Gas Turbine Plant ◽  
Cycle Efficiency ◽  
The Impact

In the present study a stationary open cycle gas turbine plant, including a thermal regenerator has been theoretically analyzed to assess the impact of steam addition in combustion air, on its performance. the effect of varying steam upto 15% air at different pressure ratios and turbine inlet temperatures have been reported. Mixing of steam in air results in higher values of cycle efficiency and increased specific work output, feasibility to generate steam needed for the purpose in a waste heat boiler have also been studied.

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.

A New Approach to the Design of Combined Cycle Plants

1992 ◽  
Author(s):  
Ir. Ted Wiekmeijer
Keyword(s):  
Gas Turbine ◽  
Waste Heat ◽  
Combined Cycle ◽  
Waste Heat Boiler ◽  
New Developments ◽  
New Approach ◽  
System A ◽  
New Development ◽  
Asme Paper

The paper will deal with new developments on basis of the ideas, laid down in ASME paper 90-GT-180, presented at the Brussels Conference. In this former paper a combination of incinerators and cogen systems was described. New development show, that some of these ideas can also be used in cogen plants, in which all steam is raised and superheated in a waste heat boiler behind a high grade fuel fired gas turbine (natural gas or equivalent). This paper will deal give a description of the new system. A comparison will be made with conventional cogen systems, comprising of a gas turbine, a dual pressure non-fired waste heat boiler and a condensing steam turbine. On basis of a particular case study both the technical and financial performances will be compared with each other.

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