This paper examines the current challenges in urban waste management systems under EU regulations for a newcomer state. Piatra Neamț is among the first Romanian cities which made the transition from a traditional to a modern waste management infrastructure through ISPA funds. These changes are...

Landfilling prevails in waste management options in Romania like others new EU members, being contrary to the concept of waste hierarchy promoted in recent years by EC. Waste disposal is done usually in non-compliant landfills and Government established a program to close these sites. This paper...

This paper aims to capture the importance of demographic dimension in the sustainable development process of the rural space. From a series of statistics data we realized an analysis of demographic indicators, which it helped us to trace the development trends characteristic for our area of...

Rural and urban development in sustainable context is a complex process that requires an improvement of the existing situation and a removing of the dysfunctions. Over time, the rural area was not addressed as much as urban area, rural analysis is often fragmentary explained and incomplete...

Natural fertilizers were used in agriculture since ancient times and are still the best method of soil fertilization. Traditional agriculture, practiced in rural areas of Romania, contributes to the maintenance of soils fertilization ecological practices. Our research shows the evolution of the...

Numerical simulation of a suspended stirrer within a homogenizing system is performed towards determining the mixing performance of a homogenizer. A two-dimensional finite volume formulation is developed for the cylindrical system that is used for the storage and stirring of biodegradable food...

This study reports the results of exergy, economic and environmental analyses of simple and combined heat and power internal combustion engines. Values of entropy production, second law efficiency are calculated, and an objective function, including initial, operation, maintenance and fuel...

Much attention is now focused on utilizing ground heat pumps for heating and cooling buildings, as well as water heating, refrigeration and other thermal tasks. Modeling such systems is important for understanding, designing and optimizing their performance and characteristics. Several heat...

A comparative exergoeconomic analysis is reported for waste heat recovery from a gas turbine-modular helium reactor (GT-MHR) using various configurations of organic Rankine cycles (ORCs) for generating electricity. The ORC configurations studied are: a simple organic Rankine cycle (SORC), an ORC...

Nowadays, the electric connection circuits of power plants (based on fossil fuels as well as renewable sources) entail generator circuit-breakers (GCBs) at the generator terminals, since the presence of that electric equipment offers many advantages related to the sustainability of a power...