This paper addresses structural problems with the Danish CO{sub}2 tax system, illustrated by analysing a case study of process integration of an absorption heat pump. Through the international environmental agreement Rio 1992 and Kyoto 1997 Denmark is committed to reduce the CO{sub}2 emissions. To facilitate fast change in the industry, towards more energy efficient technology, the Danish government has implemented a CO{sub}2 tax system where the money from the CO{sub}2 tax is put into a "CO{sub}2 fund". Instrument of this foundation says that the money must be used for energy Savings in the industry The presented case study illustrates that the different interested parties have different goals. Hence there will always be uncertainty about such projects. Some of these problems can only been brought to light from a technical perspective, because the Danish energy agency is not capable of seeing the technical details and the other parts suppressing information because clashes of interest. In this paper it is concluded that the Danish CO{sub}2 tax system is succeeding in making the industry change faster to more energy efficient production systems. But the CO{sub}2 tax system has some structural problems because the different participating parties have different goals, which are in conflict with the over all goal.
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