BACKGROUND Noninvasive positive-pressure ventilation (NPPV) delivers air at a high flow, which is associated with airway mucosal drying and impaired airway functioning. OBJECTIVES To examine the effects of mechanical ventilation parameters on relative humidity and absolute humidity during NPPV, and to evaluate the effect of a heated passover humidifier on relative humidity, absolute humidity,...

Ultrasonic cleaner merupakan alat pembersih yang memanfaatkan gelombang ultrasonic untuk memecah partikel menempel. Gelombang ini dihasilkan dari getaran atau vibrasi keluar melalui tranduser ultrasonic. biasanya digunakan membersihkan peralatan medis seperti bedah, alat-alat laboratorium, serta beberapa optik sebelum dilakukan proses sterilisasi. Penelitian bertujuan merancang dan mengimplenta...

In plants, transpiration draws the water upward from the roots to the leaves. However, this flow can be blocked by air bubbles in the xylem conduits, which is called xylem embolism. In this research, we present the design of a biomimetic microfluidic pump/valve based on water transpiration and xylem embolism. This micropump/valve is mainly composed of three parts: the first is a silicon sheet w...

This communication discusses the energy, exergy, and economic feasibility of novel heat storage based on a single-slope solar still coupled with air heater (SAH). The analysis was conducted three different stills, i.e., (SSSS), latent storage, heater. performance evaluation all types has been compared to evaluate best-performing still. Paraffin wax as phase change material (PCM) used at bottom ...

 In the preset study, the performance of a solar assisted heating, ventilation and air conditioning (HVAC) system in an operating theater building was studied. The yearly performances of the existing HVAC system and the system with the added solar collectors were simulated in terms of energy consumption and provided air conditions using a transient system simulation software (TRNSYS). In t...

High-voltage positive temperature coefficient (PTC) heaters have a high heating capacity and are fast acting; thus, they function as the actual main heating equipment in electric cars, and considerable research is devoted to improving their heating performance and efficiency. We evaluated the heating performance of a high-voltage PTC heater for an electric car by building a closed-loop-type tes...

In this paper, a thermoelectric-assisted vapor compression cycle (TVCC) is proposed for applications in air-source heat pump systems. Compared with the basic vapor compression cycle (BVCC), the TVCC using a thermoelectric heat exchanger (THEX) could enhance the heating capacity of the system in an energy-efficient way. To demonstrate the performance characteristics of TVCC, a case study on this...