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http://dx.doi.org/10.5855/ENERGY.2020.29.2.040

Rationality Review of Cost Allocation Methodology at CHP  

Kim, Deokjin (Environmental Thermoeconomics Institute)
Choi, Byungryeal (Korea Energy Economics Institute)
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Abstract
When various kinds of products are produced from a single energy system, the methodology which allocates the common cost to each product cost is very important because it is directly related with the profit and loss of producer and purchaser. In the cost allocation methodology of electricity and heat for CHP, there are heat method, work method, benefit distribution method, exergy method, and so on. Benefit distribution method is the most widely known worldwide, and exergy method is widely recognized among thermal engineers. As a result of review, it is judged that the rationality of benefit distribution method is low because the result deviates from common sense, and the rationality of exergy method is high because the result consistent with common sense. In accounting, it is calculated as merit methodology and the result is used for negotiations between producer and buyer, but In thermal engineering, the rationality of exergy methodology is described only as a thesis. The purpose of this study is to compare and examine the rationality of merit methodology and exergy methodology, and the aim is to describe in detail in order that producer and buyer can understand the rationality of each methodology.
Keywords
CHP; Cost allocation; Cost estimating; Thermoeconomics; Exergy;
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