In this paper, an experimental study of R1234yf replacing R22 in window air conditioning was carried out. The optimum types capillary tubes and the charge amount were obtained, system performance charged with tested conditioner teat facility under nominal high-temperature conditions. results revealed that cooling capacity coefficient (COP) 28.5% 11.1%, respectively, conditions, which lower than...

The coefficient of performance a window type Air-Conditioner system can be improved if reduction in the work compressor achieved by suitable technique. present study investigates effect dispersing low concentration TiO2 nanoparticles mineral oil based lubricant, as well on overall using R22 working fluid. An enhancement COP refrigeration has been observed and existence an optimum volume fractio...

Climate change as a result of human activities is a problem of a paramount importance. The global temperature on Earth is gradually increasing and it may lead to substantially hotter summers in a moderate belt of Europe, which in turn is likely to influence the air conditioning penetration in this region. The current work is an attempt to predict air conditioning penetration in different reside...

The effect of atmospheric positivity on the electrical properties of interfacial water was explored. Interfacial, or exclusion zone (EZ) water was created in the standard way, next to a sheet of Nafion placed horizontally at the bottom of a water-filled chamber. Positive atmospheric ions were created from a high voltage source placed above the chamber. Electrical potential distribution in the i...

The need for energy conservation has become increasingly important over the last several decades. Several innovations have driven the growth of energy efficient glazing use in residential, commercial and automotive applications. A number of government-private joint efforts are focused on achieving even greater use of energy efficient windows [1]. Even with the high penetration of energy efficie...

In this paper, we evaluate a performance of in-car speech enhancement techniques with single channel signal processing and microphone array signal processing. We employ SS (Fourier Spectral Subtraction) and WSS (Wavelet Spectral Subtraction) as single channel signal processing and delay-and-sum beamformer, eigen beamformer, AMNOR (Adaptive Microphone array for NOise Reduction), S-AMNOR, Svc-AMN...