Title
Financial appraisal of efficiency investments : why the good may be the worst enemy of the bestFinancial appraisal of efficiency investments : why the good may be the worst enemy of the best
Author
Faculty/Department
Faculty of Applied Economics
Research group
Engineering Management
Publication type
article
Publication
Subject
Economics
Physics
Chemistry
Biology
Engineering sciences. Technology
Source (journal)
Energy Efficiency
Volume/pages
5(2012):4, p. 571-582
ISSN
1570-646X
ISI
000310234200008
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Abstract This methodological paper has a didactic goal: improving our understanding of what cost optimal energy performance of buildings means and how financial appraisal of efficiency investments must be set up. Three items merit improvement. First, focus on the endowment character of energy performance of long-living assets like buildings. Second, defining cost optimal requires more than a comparative static tradeoff scheme; cost optimal refers to dynamic efficiency, which results from technology dynamics induced by changes in society and policy. Third, financial appraisal is a more complex issue than simple net present value and life cycle cost calculations. It must reflect the time sequential dynamics of real-life processes including real-life decision making. Financial appraisal is embedded in a complex framework made up by three dimensions: future time, doubt and irrevocability. The latter dimension connects with issues like lockin and path dependency that are generally overlooked in net present value calculations. This may lead to very erroneous recommendations regarding efficiency investments, in particular regarding the energy performance endowment of buildings. Mostly irrevocability is used as an argument to wait and learn what has, for example, blocked the pace of climate policy. But the opposite choose or lose is the logical outcome when the methodology is fed with evidenced expectations. The latter boosts energy efficiency to its boundaries, saving it from the middle-of-the-river quagmire where incomplete appraisals are dropping it too often (making the good the worst enemy of the best).
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