Optimal Planning of a Super Waste Incineration Cogeneration Plant

1996 ◽  
Author(s):  
Koichi Ito ◽  
Ryohei Yokoyama ◽  
Makoto Shimoda
Keyword(s):  
Energy Saving ◽  
Gas Turbines ◽  
Waste Incineration ◽  
Optimal Planning ◽  
Steam Turbines ◽  
Cogeneration Plant ◽  
Operational Strategies ◽  
Annual Total ◽  
Topping Cycle

This paper, is concerned with the evaluation of economic and energy saving characteristics of a super waste incineration cogeneration plant, which is equipped with gas turbines as topping cycle to overcome a drawback of low power generating efficiency of conventional waste incineration cogeneration plants only with steam turbines. Economic and energy saving characteristics are evaluated using an optimal planning method which determines capacities and operational strategies of constituent equipment from their many alternatives so as to minimize the annual total cost. Through a case study, advantages of a super waste incineration cogeneration plant are shown in comparison with a conventional one. A parametric study is also carried out with respect to the amounts of waste collected and energy distributed.

Optimal Planning of a Super Waste Incineration Cogeneration Plant

1997 ◽  
Vol 119 (4) ◽  
pp. 903-909 ◽  
Author(s):  
K. Ito ◽  
R. Yokoyama ◽  
M. Shimoda
Keyword(s):  
Energy Saving ◽  
Gas Turbines ◽  
Waste Incineration ◽  
Optimal Planning ◽  
Steam Turbines ◽  
Cogeneration Plant ◽  
Operational Strategies ◽  
Annual Total ◽  
Topping Cycle

This paper is concerned with the evaluation of economic and energy-saving characteristics of a super waste incineration cogeneration plant, which is equipped with gas turbines as topping cycle to overcome the drawback of low power generating efficiency of conventional waste incineration cogeneration plants only with steam turbines. Economic and energy-saving characteristics are evaluated using an optimal planning method, which determines capacities and operational strategies of constituent equipment from their many alternatives so as to minimize the annual total cost. Through a case study, advantages of a super waste incineration cogeneration plant are shown in comparison with a conventional one. A parametric study is also carried out with respect to the amounts of waste collected and energy distributed.

Effect of Steam Injected Gas Turbines on the Unit Sizing of a Cogeneration Plant

1994 ◽  
Author(s):  
Koichi Ito ◽  
Ryohei Yokoyama ◽  
Yoshikazu Matsumoto
Keyword(s):  
Energy Saving ◽  
Thermal Energy ◽  
Gas Turbines ◽  
Numerical Study ◽  
Optimization Method ◽  
Operational Planning ◽  
Simple Cycle ◽  
Cogeneration Plant ◽  
Operational Strategies ◽  
Energy Demands

The effect of installing steam injected gas turbines in a cogeneration plant is analyzed in the aspects of unit sizing and operational planning. An optimization method is used to determine the capacities of gas turbines and other auxiliary machinery in consideration of their operational strategies for variations of electricity and thermal energy demands. Through a numerical study on a plant for district hearing and cooling, it is clarified how the installation of steam injected gas turbines in place of simple cycle ones can improve the economic and energy saving properties. The influence of capital cost of steam injected gas turbines on the unit sizing and the above properties is also clarified.

Operational Strategies of Wet Cycle Micro Gas Turbines and Their Economic Evaluation

2015 ◽  
Author(s):  
Panagiotis Stathopoulos ◽  
Christian Oliver Paschereit
Keyword(s):  
Environmental Performance ◽  
Gas Turbines ◽  
Energy System ◽  
Financial Model ◽  
Operational Strategies ◽  
Cycle Simulation ◽  
High Heating ◽  
Heating Loads ◽  
Policy Incentives

The simultaneous expansion of variable renewables and combined heat and power (CHP) plants in Europe has given rise to a discussion about their compatibility. Due to the concurrence of high wind power generation and high heating loads, it has been argued that only the flexible, electricity oriented operation of CHP plants could go along with the extended penetration of renewables in the European energy system. The current work focuses on the wet cycle simulation of a Turbec T-100. Three operational strategies are applied on the heat and electricity demand data of a public building, to assess the economic and environmental performance of the wet cycle. The operation of the mGT is modeled in ASPEN Plus and the model is validated with data found in literature. The economic aspects of the operational strategies are assessed with a financial model, which takes into account the current CHP policy incentives and price levels. Furthermore, the advantages and drawbacks of wet operation are highlighted by its comparison to the typical heat-driven operation of dry-cycle mGTs, with a reference to the same case study. It is shown that the wet cycle turbines have a higher number of full load equivalent operating hours and can achieve higher investment payback, with minor drawbacks to their overall environmental performance.

Effect of Steam-Injected Gas Turbines on the Unit Sizing of a Cogeneration Plant

1997 ◽  
Vol 119 (1) ◽  
pp. 131-136 ◽  
Author(s):  
K. Ito ◽  
R. Yokoyama ◽  
Y. Matsumoto
Keyword(s):  
Thermal Energy ◽  
Gas Turbines ◽  
Numerical Study ◽  
District Heating ◽  
Optimization Method ◽  
Operational Planning ◽  
Cogeneration Plant ◽  
Operational Strategies ◽  
Heating And Cooling ◽  
Energy Demands

The effect of installing steam-injected gas turbines in a cogeneration plant is analyzed with respect to unit sizing and operational planning. An optimization method is used to determine the capacities of gas turbines and other auxiliary machinery in consideration of their operational strategies for variations of electricity and thermal energy demands. Through a numerical study on a plant for district heating and cooling, it is clarified how the installation of steam-injected gas turbines in place of simple-cycle ones can improve the economic and energy-saving properties. The influence of the capital cost of steam-injected gas turbines on the unit sizing and the above-mentioned properties is also clarified.

scholarly journals Energy Saving in Processes Using Simple Thermodynamic Models of Utilities

1997 ◽  
Author(s):  
Petr Stehlík ◽  
Aleš Fiaia ◽  
Zdeněk Hajný
Keyword(s):  
Energy Saving ◽  
Flue Gas ◽  
Process Design ◽  
Gas Turbines ◽  
Heat Recovery ◽  
Emissions Reduction ◽  
Steam Turbines ◽  
Thermodynamic Models ◽  
Heating And Cooling ◽  
Steam Boilers

Maximizing heat recovery in the heat exchanger network has to be considered as one of basic steps in a process design. Heating and cooling duties not serviced by heat recovery must be provided by external utilities. Simple thermodynamic models of various types of utilities (furnaces, steam boilers, steam turbines, gas turbines) are described in this paper. These models provide us with a tool for the analysis of utilities selection (provided the process heat and power demand are given), enable us to evaluate fuel burnt, power generated, costs for fuel and for exported/imported power and emissions (CO2, SO2) flowrates on a “local” or a “global” basis. This approach is convenient at the targeting stage of a design and can contribute to a substantial energy saving and flue gas emissions reduction.

Operational Strategies of Wet-Cycle Micro Gas Turbines and Their Economic Evaluation

2016 ◽  
Vol 138 (12) ◽  
Author(s):  
Panagiotis Stathopoulos ◽  
Christian Oliver Paschereit
Keyword(s):  
Environmental Performance ◽  
Gas Turbines ◽  
Energy System ◽  
Financial Model ◽  
Operational Strategies ◽  
Micro Gas Turbine ◽  
Cycle Simulation ◽  
Heating Loads ◽  
Policy Incentives

The simultaneous expansion of variable renewables and combined heat and power (CHP) plants in Europe has given rise to a discussion about their compatibility. Due to the concurrence of high wind power generation and high heating loads, it has been argued that only the flexible, electricity-oriented operation of CHP plants could go along with the extended penetration of renewables in the European energy system. The current work focuses on the wet-cycle simulation of a Turbec T-100. Three operational strategies are applied on the heat and electricity demand data of a public building, to assess the economic and environmental performance of the wet cycle. The operation of the micro gas turbine (mGT) is modeled in aspen plus, and the model is validated with data found in the literature. The economic aspects of the operational strategies are assessed with a financial model, which takes into account the current CHP policy incentives and price levels. Furthermore, the advantages and drawbacks of wet operation are highlighted by its comparison to the typical heat-driven operation of dry-cycle mGTs, with a reference to the same case study. It is shown that the wet-cycle turbines have a higher number of full load equivalent operating hours and can achieve higher investment payback, with minor drawbacks to their overall environmental performance.

Energy saving in the tissue industry: technical and economic aspects of a case study

2006 ◽  
Vol 14 (2) ◽  
pp. 185-193 ◽  
Author(s):  
R. Gabbrielli ◽  
C. Medeot ◽  
D. Miconi
Keyword(s):  
Energy Saving ◽  
Economic Aspects

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.

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