Geopolitics is the study of international relations and conflicts from geographical perspective, in other words it is also defined as thepractice of states, competing for the dominance and control the territory. Central Asia, due to its geopolitical importance has alwaysattracted the attention...

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 paper introduces Tools for Energy Model Optimization and Analysis (Temoa), an open source framework for conducting energy system analysis. The core component of Temoa is an energy economy optimization (EEO) model, which minimizes the system-wide cost of energy supply by optimizing the...

A mismatch between the fuel combustion temperature ∼2250K (adiabatic) and the high pressure steam temperature up to 900K, results in a large amount of thermodynamic losses in steam turbine (ST) cycles. A solid-state thermoelectric (TE) placed on top of a ST cycle will produce additional...

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...

My interest in Peak Oil theory was sparked by an eccentric friend of mine about two years ago. He lived next to an unusually deep lake and wanted to know if I thought it would be smart to buy up a few hundred barrels of oil and store them in his lake and then sell them later for a profit. He...

This study has the objective to analyse the impacts on the Hungarian economy of a higher EU GHG (greenhouse gas) reduction undertaking for 2020, namely increasing the GHG reduction target to 20% and to 30% relative to 1990. In order to achieve this objective, we quantify the costs/benefits of...

Consumer policy approaches regarding green products and solutions can be differentiated by their main focus. “Green positioning” is basically targeted at environmentally aware consumers, while “efficiency-focused positioning” concentrates on the efficiency gain of the product or...