In this paper, the application of evaporative cooling for refrigeration cycle to reduce power consumption in hot climates is emphasized. Experimental and analytical investigations were performed in order to specify the effect of evaporative cooling condenser instead of the commonly used air cooling condenser in window-air-conditioners. Evaporative condenser can reject more heat, thereby preve...

• A novel radiant-convective cooling system is proposed. The thermal comfort, energy and economic performance are experimentally studied. proposed has better indoor comfort than split air-conditioners. higher efficiency ratio Split air-conditioners have limitations in terms of local comfortability. Radiant systems (RCSs) cannot be used most residential buildings, due to its lack space for a cen...

Abstract The major issue studied in this paper is a natural mineral aggregate of quartz, calcite, and fluorapatite (the raw material originated from Bulgaria) before after high energy milling thermal treatment, the order to investigate properties CaO-SiO2-P2O5 ceramic system. activation effects are monitored by chemical analysis, X-ray powder diffraction, Fourier transformed infrared spectrosco...

The dimensional stability of tissue conditioners characterizes the ability of the materials to yield accurate functional impressions of oral mucosa. This study evaluated the linear dimensional changes with time of six tissue conditioners (COE Comfort, FITT, GC Soft-Liner, Hydro-Cast, SR-Ivoseal and Visco-Gel) using a travelling microscope, and relationship between these changes and weight chang...

The viscoelastic properties of new experimental tissue conditioners which consist of synthesized poly (butyl methacrylate) PBMA and a liquid of aromatic-ester plasticizer, without alcohol, were investigated to evaluate the effects of the molecular weight of polymer. The master curves of storage modulus G', dynamic viscosity eta' and loss tangent tan delta were constructed from the viscoelastic ...

 This work analyzes power consumption in signal conditioning circuits for resistive sensors. We show that, for a given dynamic range for the measurand, simple conditioners based on voltage dividers or Wheatstone bridges directly connected to an analog-to-digital converter (ADC) do not usually have minimal power consumption. We develop analytical guidelines to achieve the optimal power design f...

The Differentiated Services (DS) architecture has been defined for implementing scalable service differentiation in the Internet. DS edge routers employ traffic conditioners that contain meter, marker and shaper functionalities. The way of traffic shaping in traffic conditioners is an open issue and we believe, using intelligent shaping algorithms instead of leaky bucket algorithms (LBAs) could...

Using the method of Fault Tree Analysis (FTA), in this paper, are analyzed the causes and modes of failure of air conditioners and automotive DC electro-ventilator, as part of automotive air conditioning system. Primarily, there was given a description of FTA method and of the importance of air conditioners and DC electro-ventilators in nowadays automotive industry. Secondly, based on a detaile...

Food waste and leftovers were common materials that currently used as bio-compost or soil conditioners upon decomposition. was a source of food has declined nutritional value is not deemed favorable for human consumption. Leftovers defined uneaten edible remains meal. Biodegradation these components contributes to many macronutrients, including carbon (C), hydrogen (H), nitrogen (N), phosphorus...