Installing a ground source heat pump as a means of heating and cooling a house is becoming an increasingly popular alternative to the traditional methods. However, the installation costs being very high, an in-depth study of the configuration of such systems is needed in order to minimize these costs. The relationship between power output and controlable parameters, such as pipe radius and leng...

Abstract: In recent years, as part of the remarkable development of electronic techniques, electronic control has been applied to various systems. Many sensors and actuators have been implemented into those systems, and energy efficiency and performance have been greatly improved. However, these systems have been complicated, and much time has been required to develop system controllers. In thi...

This paper describes the efficiency improvement technology of the 3D scroll compressors and the development of 3D scroll compressor for commercial air-conditioner. 3D scroll, our newly developed profile, can compress refrigerant not only radially but also axially. Therefore, higher compression ratio, higher reliability and larger capacity are obtained by introducing 3D scroll. Since the 3D scro...

STUDY DESIGN Prospective experimental study. PURPOSE To evaluate bacterial contamination during surgery. OVERVIEW OF LITERATURE The participants of surgery and ventilation system have been known as the most significant sources of contamination. METHODS Two pairs of air culture blood agar plate for G(+) bacteria and MacConkey agar plate for G(-) bacteria were placed at 3 different location...

This paper discusses the results of tests done to investigate performance a thermoelectric air conditioner (TEAC). The TEAC is composed twelve modules (TEMs). TEMs were fixed rectangular fin heat sinks on both their hot and cold sides. With an increased input<em> </em>voltage, cooling capacity increased. At 6 V input voltage flow, suitable condition occurred. rate flow was 0.48 kg/m...

The energy consumption of air conditioning for a telecommunication base station (TBS) in China can be significantly decreased when an air to air thermosyphon heat exchanger is used for free cooling in low atmosphere temperature days. The model for the typical TBS in China was established and the air conditioning energy consumption was analyzed for the cities with climatic data in China. Taking ...

For human-centered automation, this study presents a wireless sensor network using predicted mean vote (PMV) as a thermal comfort index around occupants in buildings. The network automatically controls air conditioning by means of changing temperature settings in air conditioners. Interior devices of air con-ditioners thus do not have to be replaced. An adaptive neurofuzzy inference system and ...