Abstract
| Lingua originale | English |
|---|---|
| pagine (da-a) | 2341-2355 |
| Rivista | Energy Conversion and Management |
| Volume | 48, Issue 8 |
| Stato di pubblicazione | Published - 2007 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Nuclear Energy and Engineering
- Fuel Technology
- Energy Engineering and Power Technology
Cita questo
On thermoeconomics of energy systems at variable load conditions: integrated optimization of plant design and operation. / Cardona, Fabio; Piacentino, Antonio; Cardona.
In: Energy Conversion and Management, Vol. 48, Issue 8, 2007, pag. 2341-2355.Risultato della ricerca: Article
}
TY - JOUR
T1 - On thermoeconomics of energy systems at variable load conditions: integrated optimization of plant design and operation
AU - Cardona, Fabio
AU - Piacentino, Antonio
AU - Cardona, null
PY - 2007
Y1 - 2007
N2 - Thermoeconomics has been assuming a growing role among the disciplines oriented to the analysis of energy systems, its differentmethodologies allowing solution of problems in the fields of cost accounting, plant design optimisation and diagnostic of malfunctions.However, the thermoeconomic methodologies as such are particularly appropriate to analyse large industrial systems at steady or quasisteadyoperation, but they can be hardly applied to small to medium scale units operating in unsteady conditions to cover a variableenergy demand. In this paper, the fundamentals of thermoeconomics for systems operated at variable load are discussed, examiningthe cost formation process and, separately, the cost fractions related to capital depreciation (which require additional distinctions withrespect to plants in steady operation) and to exergy consumption. The relevant effects of the efficiency penalty due to off design operationon the exergetic cost of internal flows are also examined. An original algorithm is proposed for the integrated optimization of plantdesign and operation based on an analytical solution by the Lagrange multipliers method and on a multi-objective decision function,expressed either in terms of net cash flow or primary energy saving. The method is suitable for application in complex energy systems,such as ‘‘facilities of components of a same product’’ connected to external networks for power or heat distribution. For demonstrativepurposes, the proposed thermoeconomically aided optimization is performed for a grid connected trigeneration system to be installed ina large hotel.
AB - Thermoeconomics has been assuming a growing role among the disciplines oriented to the analysis of energy systems, its differentmethodologies allowing solution of problems in the fields of cost accounting, plant design optimisation and diagnostic of malfunctions.However, the thermoeconomic methodologies as such are particularly appropriate to analyse large industrial systems at steady or quasisteadyoperation, but they can be hardly applied to small to medium scale units operating in unsteady conditions to cover a variableenergy demand. In this paper, the fundamentals of thermoeconomics for systems operated at variable load are discussed, examiningthe cost formation process and, separately, the cost fractions related to capital depreciation (which require additional distinctions withrespect to plants in steady operation) and to exergy consumption. The relevant effects of the efficiency penalty due to off design operationon the exergetic cost of internal flows are also examined. An original algorithm is proposed for the integrated optimization of plantdesign and operation based on an analytical solution by the Lagrange multipliers method and on a multi-objective decision function,expressed either in terms of net cash flow or primary energy saving. The method is suitable for application in complex energy systems,such as ‘‘facilities of components of a same product’’ connected to external networks for power or heat distribution. For demonstrativepurposes, the proposed thermoeconomically aided optimization is performed for a grid connected trigeneration system to be installed ina large hotel.
KW - Thermoeconomics has been assuming a growing role among the disciplines oriented to the analysis of energy systems
KW - but they can be hardly applied to small to medium scale units operating in unsteady conditions to cover a variable energy demand. In this paper
KW - examining the cost formation process and
KW - expressed either in terms of net cash flow or primary energy saving. The method is suitable for application in complex energy systems
KW - its different methodologies allowing solution of problems in the fields of cost accounting
KW - plant design optimisation and diagnostic of malfunctions. However
KW - separately
KW - such as ‘‘facilities of components of a same product’’ connected to external networks for power or heat distribution. For demonstrative purposes
KW - the cost fractions related to capital depreciation (which require additional distinctions with respect to plants in steady operation) and to exergy consumption. The relevant effects of the efficiency penalty due to off design operation on the exergetic co
KW - the fundamentals of thermoeconomics for systems operated at variable load are discussed
KW - the proposed thermoeconomically aided optimization is performed for a grid connected trigeneration system to be installed in a large hotel.
KW - the thermoeconomic methodologies as such are particularly appropriate to analyse large industrial systems at steady or quasisteady operation
UR - http://hdl.handle.net/10447/27735
M3 - Article
VL - 48, Issue 8
SP - 2341
EP - 2355
JO - Energy Conversion and Management
JF - Energy Conversion and Management
SN - 0196-8904
ER -