Browse

A better energy efficiency of a building can be obtained by implementing passive and active energy efficient design strategies. The initial design phase starts with implementation of several passive strategies, i.e. strong thermally insulated building envelope, building?s orientation, windows placement, and building?s aspect ratio, window to wall ratio, use of thermal mass, natural lighting, shadings and other solutions. However, looking at how building are designed, built and operated nowadays, it can be observed...

Small hydroelectric power plants (SHPP) are accepted by the legislation of EU Member States to benefit from renewable energy promotion scheme through various market mechanism. The SHPPs are a particular form and case of hydroelectric power plants (HPP) and are having a maximum capacity of 10 MW. Since the green certificate (GC) promotion scheme was awarded in Romania (2008), a considerable number of SHPP were constructed and commissioned in the last years. These projects have the same philosophy as a large hydro, ...

Today, growing number of ransomware attacks from the cyberspace is getting more and more attention as the danger of immediate closing of business for attacked organizations rises dramatically. High level encryptions used by current versions of ransomware makes it almost impossible to be decrypted in the real time and probability of production going live again for attacked organization could be low. Estimated revenue up to 1 billion USD in 2016 makes this type of cybercrime activity very popular within the hackers?...

This article presents the results, obtained from testing an equipment used to obtain biogas and biochar from biomass, developed and manufactured based on a patent developed on a research and development project by the IHP staff. A modern way in order to produce ecological and cheap thermal energy is to utilize biomass through micro-gasification process called TLUD (Top-Lit UpDraft) with high conversion efficiencies and emissions of CO and low PM2,5. A new way for producing energy from biomass is the CHAB concept (...

Buildings account for significant energy consumptions in the global consumptions, according to the International Energy Agency. The path towards 2050 is that of nearly Zero Energy Buildings (nZEB), a path that should change the way that buildings are designed in current practice. The design of a building?s envelope is always focusing more on the heat transfer of top components (i.e. exterior walls, terraces, roofs) and less on the heat transfer in bottom components (i.e. floors on the ground, walls in contact with...

A starting point for roadheader robotisation (understood as a fully autonomous machine) is to automate the cutting process, which is the basic working process carried out by such machines. In case of boom?type roadheaders, it consists in automatic control of the movement of cutting heads to ensure that the face surface can be worked with optimum process parameters. This will guarantee high drilling efficiency (drilling advancement) and lower energy consumption, reduced dynamic loads and elimination of overloads. T...

The paper considers the issue of effective scale inhibitor applied while developing an oilfield using steam assisted gravity drainage technique, and presents a case study of injecting superheated steam of 140-160?C in the Ashalchi oilfield. In such conditions, organophosphorus chelating agents conventionally used to prevent scale formation degraded and proved to be ineffective. The authors analyzed chemical composition of scales deposited on the electric submersible pump pulled from one of the wells in the Ashalch...