Fin-and-tube heat exchangers have been extensively used in many fields, especially heat, ventilation, air-conditioning, and refrigeration systems. In the case of operation a fin-and-tube exchanger as an air cooler, frost formation is important effect that should be taken into account. The accumulation process undesirable since it deteriorates transfer due to insulation layer well causing excess...

To get comfortable air, it can be done by using an air conditioner or cooler. The electrical power used for the cooler is relatively lower. This research aims to see effect of number cooling pads on output condition and effectiveness was conducted experimentally. varying used, thick. distance between 1.5 cm. temperature inlet has a dry bulb 30

This paper presents environment friendly refrigerant R290 as a solution to the environmental concerns like depletion of ozone layer and rise in global warming because of wide use of synthetic refrigerants R22 and R134a. The water cooler is the widely used refrigeration application in warm climatic countries. Refrigerant R22 and R134a are predominantly used refrigerants in water cooler refrigera...

A novel material open to warm air stays below ambient temperature under maximum solar intensities of mid-summer. It is found to be 11 °C cooler than a commercial white cool roof nearby. A combination of specially chosen polymers and a silver thin film yields values near 100% for both solar reflectance, and thermal emittance at infrared wavelengths from 7.9 to 13 μm.

Cabric & Janicijevic (2003) described a design for an air cooler in a laboratory crucible furnace, with the aim of regulating the crystallization rates in branchy Tamman test tubes. In the present paper, we show the development and improvement of the interior and exterior of the cooler, which better regulates different paths and rates of air ̄ow in a chamber furnace (Fig. 1). The setup serves to...

gastrointestinal hemorrhage by irradiation with a power neo-dymium-YAG laser. 8 Cortese DA, Kensey JH. Endoscopic management of lung cancer with hematoporphyrin derivative phototherapy. Photoradiation therapy in the treatment of advanced cancer of the trachea and bronchus. Chest (in press) 11 Dougherty TJ. Photoradiation therapy (PRT) of malignant tumors. In: Critical review in oncology-hematol...

In recent years, energy engineers have examined industrial compressed air systems looking for opportunities to reduce the energy consumption, which in turn leads to operating cost savings. After identifying possible actions that might lead to a reduction in energy usage, it is necessary to perform an analysis to determine the projected energy and cost savings, and to estimate the cost of implem...

There is currently much attention being given to the observed increase in near-surface air temperatures during the last century. The proper investigation of heating trends, however, requires that we include surface heat content tomonitor this aspect of the climate system. Changes in heat content of the Earth's climate are not fully described by temperature alone. Moist enthalpy or, alternativel...