altered in many ways with the view to cut down weight and cost and to ensure simplicity. It consists of two parts : (a) the ftiotor and blower ; (b) the ether apparatus. A.?The air current is supplied by an electric motor of | h.p., driving a rotary blower, and is made to pass from the blower through an air filter, and then through a two-necked Wolff's bottle half-filled with water. The air fil...

When a patient is unable to breathe or maintain their airway they will most likely be ventilated by a bag-valve-mask. We propose to replace the traditional bag-valve-mask with an electric blower ventilator. This handheld feedback controlled device will automatically compensate for mask leak and enable the clinician to deliver computer controlled respiratory rates and tidal volumes. We have buil...

This experiment was conducted to determine how much contaminant could be expected to be inhaled when overbreathing several different types of respirators. These included several tight-fitting and loose-fitting powered air-purifying respirators (PAPRs) and one air-purifying respirator (APR). CO(2) was used as a tracer gas in the ambient air, and several loose-and tight-fitting respirators were t...

In this paper we outline a semi-empirical procedure for predicting the broadband sound power spectrum radiated by any member of a family of geometrically similar, centrifugal blowers. The prediction scheme is based on the use of a normalized sound power spectrum that is obtained by measuring the sound power radiated by one member of the blower family. In the present instance, a lownoise blower ...

BACKGROUND Large quantities of water condensation occur in the anaesthesia circuit during low-flow anaesthesia. We hypothesized that cooling of the CO2 absorbent would prevent water condensation. METHODS To cool CO2 absorbent efficiently, we constructed a novel temperature gradient reduction (TGR) canister, which was cooled by a blower. Experiments were divided into three groups: the conventi...

Currently, total electricity consumption of furnaces is unregulated, tested at laboratory conditions using the DOE test procedure, and is reported in the GAMA directory as varying from 76 kWh/year to 1,953 kWh/year. Furnace blowers account for about 80% of the total furnace electricity consumption and are primarily used to distribute warm air throughout the home during furnace operation as well...

Inadequately performed hand hygiene and non-disinfected surfaces are two reasons why the keys and mouse-buttons of laptops could be sources of microbial contamination resulting consequently in indirect transmission of potential pathogens and nosocomial infections. Until now the question has not been addressed whether the ventilation-blowers in laptops are actually responsible for the spreading ...

Microbubble aeration has been recognized as a tool to improve dissolved oxygen and fish culture performance in limited water aquaculture. This research aims investigate the effect of microbubble on increasing oxygen, performance, stress resistance red tilapia. The study used 3 treatments aerations namely microbubble, blower, without with replicates each. Red tilapia weighing 115.27±3.93 g were ...

Evaluation of energy requirements is an important part of optimizing blower selection for aeration applications. In order to calculate blower power it is important to use actual process requirements and appropriate ambient conditions. A methodology is developed to establish the air flow, pressure, and ambient conditions that are reflective of operational energy use without excessive engineering...