Average full (including capital, operation and maintenance costs) annual heating costs in a 2 standard family house with 180 m of floor surface are compared for various heating systems under the Polish economic conditions. The compared heating technologies comprise water to water and ground loop...

Control power (regulating power, balancing power) is used to quickly restore the supply-demand balance in power systems. Variable renewable energy sources (VRE) such as wind and solar power are often thought to increase the reserve requirement significantly. This paper provides a comprehensive...

В статье проанализировано состояние отрасли теплоснабжения, определен круг основных проблем, изложены рекомендации по реформированию отрасли как...

The market of heating systems changed considerably in 12 years. Due to their high losses, poor quality, and high prices, the district heating systems were replaced by micro thermal plants that seemed more cost efficient at that time. As the market changed the interest for affordable modern...

One of the most commonly used heating devices in geothermal systems is the heat exchanger. The output conditions of heat exchangers are based on several parameters. The heat transfer area is one of the most important parameters for heat exchangers in terms of economics. Although there are a lot...

Direct utilization of geothermal energy consists of various forms for heating and cooling instead of converting the energy for electric power generation. The major areas of direct utilization are (1) swimming, bathing and balneology, (2) space heating and cooling including district heating, (3)...

The trend towards an increased importance of distributed (renewable) energy resources characterized by intermittent operation redefines the energy landscape. The stochastic nature of the energy systems on the supply side requires increased flexibility at the demand side. We present a model that...

In this study the primary energy use and carbon footprint over the life cycle of a wood-frame apartment building designed either conventionally or to the passive house standard are analyzed. Scenarios where the building is heated with electric resistance heaters, bedrock heat pump or...

Renewable energy sources (RES) will have to play the main role in moving towards sustainable economic development. Talking about the perspectives of the use of solar energy, it is evident that the main market is decided by the consumer. The most important problem, determining the slow absorption...

In bioenergy villages, local bioenergy plants are installed to supply electricity, which is fed into the national grid, and to heat households through a local heat distribution network. In this paper, a linear mathematical model, which economically optimizes local bioenergy production and...