In this study, a mathematical model was developed for multiple-effect evaporators. These evaporators have cocurrent, countercurrent and parallel flow operation options. Each operation was investigated with and without pre-heaters. The effect of pre-heating on evaporation process was investigated...

Indicators for sustainable development, such as: Dow Jones sustainability group indices, life cycle index, ecological footprint, sustainability cities index, Well-Being Index, are acknowledged evaluation instruments in the international development policy. They are used to evaluate...

This study strives to clarify to what extent the improved insulation of new buildings affects the economically rational choice of heating supply. In the Danish context, natural gas furnaces show to be economically rational for the society only in few cases. District heating should be advocated...

The goal of this paper is to measure the financial performance of 21 primary Clean Techs (CT) equity indexes, covering the primary energy markets worldwide. We use a modified state-space market model to recursively estimate the risk/return performance of each index, and two market benchmarks are...