Allocating the residues cost of a typical HTGR directly integrated with steam cycle using distributed entropy method

Abstract EN

Exergetic cost theory (ECT) method, is a conventional exergoeconomic analysis method.

In energy systems, disposing of remaining flows of matter or energy is called residues.

Distributed entropy (DE) method is an important method for allocating the residues cost.

In this study, ECT method and the DE method are applied to a high-temperature gas-cooled reactor (HTGR) that coupled with the steam cycle through the heat exchanger.

Exergetic cost and exergoeconomic cost are obtained for each stream.

Then residues cost distribution ratio is calculated by ECT and DE methods.

The results have been compared with a model that is based on the disaggregation of physical exergy into its enthalpic and entropic terms which known as “H&S” model.

The results show that DE method performed similar to the H&S model, but the DE method is a rational criterion to allocate the cost of the residues.

The unit product cost of HTGR turbine and steam turbine are calculated as 0.2526 cents/kWh and 1.1500 cents/kWh, respectively.

The maximum product unit exergoeconomic cost value is 3.1420 cents/kWh that is corresponding to steam cycle superheater.