In this research scotch pine (Pinus sylvestris L.), Eastern beech (Fagus orientelis L.), oak (Quercus petraea L.) samples have been covered with polyurethane, acrylic, cellulosic varnish. In order to determine the physical changes which occurred on varnish layers caused by steam and wet heat, the samples were exposed to TS 4982 EN 12721 wet heat and TS EN 438-2 steam. According the results, the...

Recent R&D activities in nuclear fusion have identified the DEMO reactor as ITER successor, aiming at demonstrating technical feasibility of plants, along with their commercial exploitation. However, pulsed operation machine causes an “unconventional” system, posing unique challenges to functional steam generator, for which it is necessary define and qualify a reference configuration DEMO. ...

Continued emphasis on development of thermal cooling systems is being placed that can cycle low grade heat. Examples include solar powered unmanned aerial vehicles (UAVs) and data storage servers. The power efficiency of solar module degrades at elevated temperature, thereby, necessitating the need for heat extraction system. Similarly, data centres in wireless computing system are facing incre...

Steam is a key energy vector for industrial sites, most commonly used for process heating and cooling, cogeneration of heat and mechanical power as a motive fluid or for stripping. Steam networks are used to carry steam from producers to consumers and between pressure levels through letdowns and steam turbines. The steam producers (boilers, heat and power cogeneration units, heat exchangers, ch...

teurizers (1). I f these various precautions are not sufficient to produce a satisfactory steam supply, the alternative is the production of culinary steam from potable water, using the unsatisfactory primary steam supply as a source of heat. The 3A recommended practice just referred to includes a sketch of the recommended location of the parts necessary for such an installation. The other alte...

A new cogeneration installation was in the process of being commissioned when severe subsynchronous vibration was detected on the generator during no load tests. Subsequently, two rotordynamics problems were discovered. These problems prohibited the steam turbine generator set from reaching full speed. Additional vibration problems were anticipated once the generator was loaded and the steam fl...

In the present paper. a mathematical model of a combustion steam generator is presented. The model of power plant was implemented using GE GateCycle code. The effects of Over Fire Air and Reburning combustion techniques on the plant performance were studied using from both theoretical and experimental approach. Experimental data were studied and represented depending on the combustion parameter...

This paper carries out a performance analysis based on the first and second laws of thermodynamics for heat recovery vapor generator (HRVG) of ammonia-water mixture when the heat source is low-temperature energy in the form of sensible heat. In the analysis, effects of the ammonia mass concentration and mass flow ratio of the binary mixture are investigated on the system performance including t...