Influence of Fuel Cost on the Operation of a Gas Turbine-Waste Heat Boiler Cogeneration Plant

1990 ◽  
Vol 112 (1) ◽  
pp. 122-128 ◽  
Author(s):  
K. Ito ◽  
R. Yokoyama ◽  
S. Akagi ◽  
Y. Matsumoto
Keyword(s):  
Gas Turbine ◽  
Waste Heat ◽  
District Heating ◽  
Planning Method ◽  
Operational Cost ◽  
Cogeneration Plant ◽  
Fuel Cost ◽  
Waste Heat Boiler ◽  
Heating And Cooling

The influence of fuel cost on the operation is investigated for a gas turbine-waste heat boiler cogeneration plant by an optimal operational planning method. A planning method is first presented by which the operational policy of each piece of constituent equipment is determined so as to minimize the operational cost. Then, a case study is performed for a cogeneration plant used for district heating and cooling. Through the study, it is made clear how the optimal operational policy and the economic or energy conservative properties are influenced by the costs of purchased electric power and natural gas. It is also shown that the optimal operational policy is superior in economy as compared with other conventional ones.

Optimal Operation of Cogeneration Plants With Steam-Injected Gas Turbines

1995 ◽  
Vol 117 (1) ◽  
pp. 60-66 ◽  
Author(s):  
K. Ito ◽  
R. Yokoyama ◽  
Y. Matsumoto
Keyword(s):  
Energy Saving ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Waste Heat ◽  
District Heating ◽  
Optimal Operation ◽  
Programming Approach ◽  
Waste Heat Boiler ◽  
Heating And Cooling ◽  
Mathematical Programming Approach

The effect of introducing steam-injected gas turbines into cogeneration plants is investigated from economical and energy-saving aspects on the basis of a mathematical programming approach. An optimal planning method is first presented by which the operational strategy is assessed so as to minimize the hourly running cost. Then, a case study is carried out on a plant used for district heating and cooling. Through the study, it is ascertained that the proposed method is a useful tool for the operational planning of steam-injected gas turbine plants, and that these plants can be attractive from economical and energy-saving viewpoints as compared with both simple-cycle gas turbine plus waste heat boiler plants and conventional energy supply ones.

Optimal Multistage Expansion Planning of a Gas Turbine Cogeneration Plant

1996 ◽  
Vol 118 (4) ◽  
pp. 803-809 ◽  
Author(s):  
R. Yokoyama ◽  
K. Ito ◽  
Y. Matsumoto
Keyword(s):  
Gas Turbine ◽  
Energy Demand ◽  
Numerical Study ◽  
District Heating ◽  
Development Project ◽  
Planning Problem ◽  
Optimization Approach ◽  
Cogeneration Plant ◽  
Expansion Planning ◽  
Heating And Cooling

A multistage expansion planning problem is discussed concerning a gas turbine cogeneration plant for district heating and cooling using an optimization approach. An optimal sizing method for single-stage planning proposed by the authors is extended to this case. Equipment capacities and utility maximum demands at each expansion stage are determined so as to minimize the levelized annual total cost subject to increasing energy demands. A numerical study on a simple-cycle gas turbine cogeneration plant to be installed in a district development project clarifies the relationship between optimal expansion planning and energy demand trend, and shows the effectiveness of the proposed method.

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.

Multi-objective Optimization in Unit Sizing of a Gas Turbine Cogeneration Plant

1995 ◽  
Vol 117 (1) ◽  
pp. 53-59 ◽  
Author(s):  
R. Yokoyama ◽  
K. Ito
Keyword(s):  
Gas Turbine ◽  
Energy Demand ◽  
Numerical Study ◽  
District Heating ◽  
Primary Energy ◽  
Cogeneration Plant ◽  
Multi Objective Optimization ◽  
Weighting Method ◽  
Multi Objective ◽  
Heating And Cooling

An optimal planning method for cogeneration plants proposed earlier is extended to the case with multiple optimization criteria. Equipment capacities and utility maximum demands are determined so as to minimize both the annual total cost and the annual primary energy consumption in consideration of plants’ operational strategies for energy demand requirements. This problem is considered as a multi-objective optimization one, and a discrete set of Pareto optimal solutions is derived numerically by the weighting method. Through a numerical study on a simple cycle gas turbine cogeneration plant used for district heating and cooling, a trade-off relationship between the economic and energy-saving properties is clarified.

scholarly journals Performance Criteria for Gas Turbine Cogeneration Plant

1993 ◽  
Author(s):  
K. Sarabchi ◽  
E. Khoshravan
Keyword(s):  
Gas Turbine ◽  
Waste Heat ◽  
District Heating ◽  
Performance Criteria ◽  
Cogeneration Plant ◽  
Recovery Boiler

With current gas turbine practice up to two-thirds of the energy available in the fuel is lost in the form of unused heat, By making practical use of this waste heat in a recovery boiler to produce steam for district heating or process applications it is possible to reduce the energy wastage to as little as 10 percent. In this paper different performance criteria for assessment of a gas turbine cogeneration plant (GTCP) have been defined and compared with each other, Also, the practical range of performance criteria have been determined.

scholarly journals Improvements in Incinerators by Means of Gas Turbine Based Cogen Systems

1990 ◽  
Author(s):  
Ir. Ted Wiekmeijer
Keyword(s):  
Gas Turbine ◽  
Nuclear Power ◽  
Waste Heat ◽  
Waste Incineration ◽  
Global Risk ◽  
Waste Heat Boiler ◽  
Power Stations ◽  
New Process ◽  
Made In

In this paper a new process is described to improve the efficiency of power generation in waste incineration plants. It is proposed to superheat the steam in a gas turbine/waste heat boiler combination rather than in the incinerator boiler. Although this is not discussed in this paper the same process may be applied in nuclear power stations where the superheating of steam is also a problem. A global risk-analysis of the addition of equipment is made in this paper. On basis of a case-study the financial advantages are demonstrated.

scholarly journals Experimental and Numerical Study of a Microcogeneration Stirling Unit under On–Off Cycling Operation

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 801
Author(s):  
Gianluca Valenti ◽  
Aldo Bischi ◽  
Stefano Campanari ◽  
Paolo Silva ◽  
Antonino Ravidà ◽  
...  
Keyword(s):  
Numerical Study ◽  
Thermal Storage ◽  
Primary Energy ◽  
Operational Cost ◽  
Cogeneration Plant ◽  
Economic Optimization ◽  
Viable Option ◽  
Heating Value ◽  
Energy Flows

Stirling units are a viable option for micro-cogeneration applications, but they operate often with multiple daily startups and shutdowns due to the variability of load profiles. This work focused on the experimental and numerical study of a small-size commercial Stirling unit when subjected to cycling operations. First, experimental data about energy flows and emissions were collected during on–off operations. Second, these data were utilized to tune an in-house code for the economic optimization of cogeneration plant scheduling. Lastly, the tuned code was applied to a case study of a residential flat in Northern Italy during a typical winter day to investigate the optimal scheduling of the Stirling unit equipped with a thermal storage tank of diverse sizes. Experimentally, the Stirling unit showed an integrated electric efficiency of 8.9% (8.0%) and thermal efficiency of 91.0% (82.2%), referred to as the fuel lower and, between parenthesis, higher heating value during the on–off cycling test, while emissions showed peaks in NOx and CO up to 100 ppm but shorter than a minute. Numerically, predictions indicated that considering the on–off effects, the optimized operating strategy led to a great reduction of daily startups, with a number lower than 10 per day due to an optimal thermal storage size of 4 kWh. Ultimately, the primary energy saving was 12% and the daily operational cost was 2.9 €/day.

scholarly journals Competitiveness of the biomethane opposite with the CHP technology of biogas by definite plant size

2013 ◽  
pp. 5-9
Author(s):  
Ilona Barta-Juhász
Keyword(s):  
Heat Recovery ◽  
Waste Heat ◽  
District Heating ◽  
Cost Effective ◽  
Plant Size ◽  
Net Income ◽  
Renewable Energy Resources ◽  
Heating And Cooling ◽  
Emission Reduction Strategies ◽  
Cleaning Technology

The biogas sector has never before aroused so much attention as it does today. Combined heat and power (CHP) reliable and cost-effective technologies that are already making an important contribution to meeting global heat and electricity demand. Due to enhanced energy supply efficiency and utilisation of waste heat renewable energy resources, CHP, particularly together with district heating and cooling (DHC), is an important part of national and regional Green House Gas (GHG) emission reduction strategies. During my work I am going to use the basic data of a certain biogas plant than I assemble one model from that. Against the CHP technology I am going to plan a biogas cleaning-equipment. During my research it revealed, that in the case of a 1 MW output power plant it is not worthy to deal with biogas cleaning between national conditions. Investigating the quantity of heat recovery in the CHP technology it is obvious, that the net income at 1 m3 biogas is at least 72 times more than the cleaning technology (heat recovery is 0%).

Feasibility limits of using low-grade industrial waste heat in symbiotic district heating and cooling networks

2020 ◽  
Vol 22 (6) ◽  
pp. 1339-1357 ◽  
Author(s):  
Maurizio Santin ◽  
Damiana Chinese ◽  
Alessandra De Angelis ◽  
Markus Biberacher
Keyword(s):  
Industrial Waste ◽  
Waste Heat ◽  
District Heating ◽  
Low Grade ◽  
Heating And Cooling ◽  
Industrial Waste Heat
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