This paper presents the development of the low cost liquid pump. The rotary compressor developed as the gas compressor for the residential air-conditioner was converted into the liquid refrigerant pump. Problems of the liquid refrigerant pump are the reliability assessment of sliding parts and the reduction of the noise generated by discharge pulsation in this development. Therefore some modifi...

Gas turbines incur a loss of output power during hot seasons due to high ambient air temperatures, and input air cooling systems are often used to partly offset this problem. Here, results are reported for an investigation of the utilization of a heat pump to cool the inlet air of a gas turbine compressor. The analyses are carried out for two climates: the city of Yazd, Iran, which has a hot, a...

Wave chaos is a concept which has already proved its practical usefulness in design of double-clad fibers for cladding-pumped fiber lasers and fiber amplifiers. In general, classically chaotic geometries will favor strong pump absorption and we address the extent of chaotic wave dynamics in typical air-clad geometries. While air-clad structures supporting sup-wavelength convex air-glass interfa...

A heat pump uses natural energy from renewable sources such as air, ground or water. The pump, acquiring thermal the environment (75%) and using electricity (25%), supplies it to heated object. pump-based system consists of a source (heat is taken it), unit an upper transferred it). refrigerant transfers lower source. paper discusses types pumps in terms use technical economic analysis was carr...

A method of determining dust emission and efficiency of its removal by means of local exhaust ventilation from machinery has been described. It complies with Standard No. EN 1093-3:1996 (European Committee for Standardization, 1996) and consists in determining air pollution concentrations in the measurement duct used for air removal from the chamber incorporating devices to be tested. The air v...

Venous air embolism (VAE) is a potential complication of surgical procedures as well as central venous access. There are several reports in the literature of VAE during the in-hospital use and placement of central venous access. However, we are unaware of previous cases of VAE in children who received home infusion therapy via central venous access. We report the occurrence of a VAE in a 2-year...

In recent years, as the mobile equipment advances, higher output and higher energy density are required of the battery which drives the mobile equipment. As one of the solutions, development of portable fuel cells (DMFC) with methanol used for fuel has been progressed and the fuel cells will be soon put to practical use. The authors have developed a small air pump (0.2W output), which is mounte...