Heat exchanger inventory cost optimization for power cycles with one feedwater heater

•Cost optimization of heat exchanger inventory in power cycles is investigated.•Analysis for an endoreversible power cycle with an open feedwater heater is shown.•Different constraints on the power cycle are investigated.•The constant heat addition scenario resulted in the lowest value of the cost f...

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Bibliographic Details
Published in:Energy conversion and management 2014-10, Vol.86, p.379-387
Main Authors: Qureshi, Bilal Ahmed, Antar, Mohamed A., Zubair, Syed M.
Format: Article
Language:English
Subjects:
Applied sciences
Constants
Cost engineering
Cost function
Devices using thermal energy
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Feedwater
Feedwater heater
Heat exchanger
Heat exchangers
Heat exchangers (included heat transformers, condensers, cooling towers)
Heaters
Heating equipment
Inventory
Optimization
Temperature
Thermoeconomic
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Summary:•Cost optimization of heat exchanger inventory in power cycles is investigated.•Analysis for an endoreversible power cycle with an open feedwater heater is shown.•Different constraints on the power cycle are investigated.•The constant heat addition scenario resulted in the lowest value of the cost function. Cost optimization of heat exchanger inventory in power cycles with one open feedwater heater is undertaken. In this regard, thermoeconomic analysis for an endoreversible power cycle with an open feedwater heater is shown. The scenarios of constant heat rejection and addition rates, power as well as rate of heat transfer in the open feedwater heater are studied. All cost functions displayed minima with respect to the high-side absolute temperature ratio (θ1). In this case, the effect of the Carnot temperature ratio (Φ1), absolute temperature ratio (ξ) and the phase-change absolute temperature ratio for the feedwater heater (Φ2) are qualitatively the same. Furthermore, the constant heat addition scenario resulted in the lowest value of the cost function. For variation of all cost functions, the smaller the value of the phase-change absolute temperature ratio for the feedwater heater (Φ2), lower the cost at the minima. As feedwater heater to hot end unit cost ratio decreases, the minimum total conductance required increases.
ISSN:0196-8904
1879-2227
DOI:10.1016/j.enconman.2014.05.028