Thermodynamic pre-determination of power generation potential in geothermal low-temperature applications
2014 (English)In: Geothermal Energy, Vol. 2, no 4, 1-10 p.Article in journal (Refereed) Published
Background: Small capacity, low temperature, geothermal heat sources providesignificant opportunities for distributed, small scale power generation. Projectdefinitions and pre-dimensioning however require advanced thermodynamicengineering at a cost independent of project size. In order to reduce this cost, anew method has been developed to allow basic level engineers to performpre-optimisation of thermodynamic potential as well as expected performance usingavailable power plant technology at such pre-optimized conditions.Results: By reducing the complexity of second-law computations, a simpletwo-dimensional diagram is shown representing the dimensioning criteria requiredfor maximum power generation using the particular heat source and sink whileconsidering expected power plant performance, using systems and componentson the market.Methods: By sensitivity analysis the combination of thermodynamic analysis and realworld data correlations was simplified and arranged for pre-dimensioning ofbusiness cases.Conclusions: Optimal pre-dimensioning of power generation system for anygeothermal heat source, with a defined heat sink, can be determined withoutadvanced thermodynamic expertise. This reduces the cost for business case proposals,pre-dimensioning and tender specifications of small-scale power generation systemsfor low temperature heat sources. The intended implication of this work is to increasethe use of low-temperature geothermal wells for distributed power generation.
Place, publisher, year, edition, pages
Springer, 2014. Vol. 2, no 4, 1-10 p.
ORC; Kalina; Waste heat; Power cycle; Geothermal; Performance;
Research subject Energy Technology
IdentifiersURN: urn:nbn:se:kth:diva-188003DOI: 10.1186/s40517-014-0004-2ScopusID: 2-s2.0-84942116253OAI: oai:DiVA.org:kth-188003DiVA: diva2:932997
QC 201606032016-06-022016-06-022016-06-03Bibliographically approved