Russia’s Gazprom, the world’s largest gas company, has precipitated serious tensions among the post-Soviet countries by sharply hiking gas prices this winter. Gazprom has been supplying gas to these countries at heavily subsidized rates and wants now to take advantage of the rising...

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...

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...

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...

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...

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...

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...

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...

В статье на конкретных цифрах и фактах показано, что российская экономика с начала рыночных реформ и по сей день находится в кризисном состоянии. Переход на...