In this paper, the authors propose a case study on the energy efficiency of a house built in accordance with sustainable development directions.

Cellular glass-ceramic was produced by sintering at 850-860 ºC using, as the main raw material, coal fly ash (74-79 %), an industrial by-product, borax (20-25 %,) as a fluxing agent and calcium carbonate (1 %), as a classic expanding agent. The originality of the work was the application of the unconventional, fast and economical technique of direct microwave heating. This technique is not used in similar industrial processes. The results showed very high compressive strength (11.7-18.3 MPa), good thermal insulation properties, suitable for building applications and very low specific energy consumption (0.50-0.60 kWh/kg).

Providing the required indoor comfort at minimal operating costs is the main objective of every HVAC system. However, despite the fact that in theory, each design effort promises to deliver the design flow at each heating or cooling unit, in reality this is not happening too often. The role of balancing is to obtain the design flow at each terminal unit, by installing some specialized valves and applying a coherent procedure of setting and adjustment. This paper presents a simple hydronic balancing simulator, implemented in a Microsoft Excel spreadsheet. The model uses static STAD balancing valves, provided by the Swedish manufacturer Tour Andersson. The main purpose of the simulator is to obtain a learning tool for students or young engineers, allowing them to observe and understand the circuits interactions when running balancing procedures.

The increase in energy consumption and emissions of greenhouse gases (GHG) has increasingly serious consequences on the environment, society and the economy, both at the global, European and national level. In this context, the fight for measures to combat the effects of climate change require the establishment of energy and ecological strategies. At the European level, the neutralization of greenhouse gas emissions by 2050, the improvement of energy efficiency and promotion of renewable energy sources have been established. The use of wind resources, especially wind turbines with permanent magnets synchronous generators and various advanced electrical actuators - high power converters, is increasingly emphasized. This paper is an elaborate bibliographic study of the state-of-the-art wind power chain composition, technologies and configurations of a wind farm. The current trends of the different topologies in the wind power conversion chain available in the literature are addressed and studied.

The ever-increasing global consumption of natural gas and the rapid depletion of fossil fuel reserves have sounded the alarm to those concerned with finding energy solutions that meet current needs for sustainable economic growth. This paper presents the access of biomethane in existing natural gas distribution systems, in order to reduce the consumption of fossil fuels. This article investigates specific indicators of the Romanian natural gas market, aiming to identify an efficient solution for supplementing less harmful fuels than fossil fuels, biomethane being a renewable alternative to fossil fuels. In this case, the „green” gas - biomethane reaches the end users through the existing distribution pipes

This paper focus on biomechanical models analysis of human body from one to five degree of freedom. As result of this analysis the medium frequencies of different human body elements are found

FDS is the software researchers use to simulate the evolution of a fire inside the buildings or to simulate exterior fires. FDS was used in research on modelling of the fire inside a room with dimensions of 3(m) x 6(m) x 2.7(m). The research included an experimental study and a computer modelling component to expand the probable scenarios. The research concludes that the FDS software can allow proper modelling of fire evolution, but an important stage is a phase of determining the model and calibrating it. Entering the input data correctly is an extremely important step