40. Effects of Heating, Posture, and Air Velocity on Breathing Zone Concentrations for Manikin in a Wind Tunnel. Part I

2006 ◽  
Author(s):  
S. Guffey ◽  
W. El-Nahas
Keyword(s):  
Wind Tunnel ◽  
Breathing Zone ◽  
Air Velocity

Effect of Wind Tunnel Air Velocity on VOC Flux Rates from CAFO Manure and Wastewater

2008 ◽  
Author(s):  
David B Parker ◽  
Edward A Caraway ◽  
Marty B Rhoades ◽  
N Andy Cole ◽  
Richard W Todd ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Air Velocity

Effect of Wind Tunnel Air Velocity on VOC Flux from Standard Solutions and CAFO Manure/Wastewater

2010 ◽  
Vol 53 (3) ◽  
pp. 831-845 ◽  
Author(s):  
D. B. Parker ◽  
E. A. Caraway ◽  
M. B. Rhoades ◽  
N. A. Cole ◽  
R. W. Todd ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Air Velocity ◽  
Standard Solutions

scholarly journals Kinerja Thermoelectric pada Kotak Pendingin Berdasarkan Rangkaian Thermoelectric dan Putaran Fan Wind Tunnel

2021 ◽  
Vol 12 (1) ◽  
pp. 27
Author(s):  
Munawir Munawir ◽  
Mega Nur Sasongko ◽  
Nurkholis Hamidi
Keyword(s):  
Wind Tunnel ◽  
Temperature Difference ◽  
Coefficient Of Performance ◽  
Peltier Effect ◽  
Heat Absorption ◽  
Air Velocity ◽  
Cold Side ◽  
Parallel Circuits ◽  
In Series ◽  
Parallel Circuit

<p class="Abstract">A thermoelectric cooler (TEC ) is a component of an electric solid-state cooler that works as a heat pump in the cooling process. Utilizing the peltier effect that is when an electric current is flowed heat absorption occurs on both sides of the thermoelectric and the release of heat on the other side. The use of thermoelectric as a coolant in cool box systems has been widely studied. The purpose of this study was to determine the performance of the cooler using thermoelectric based on the circuit and air velocity in the wind tunnel. The studied performance includes temperature difference, heat absorption, and coefficient of performance. The method used in this study is a real experimental method, with research variables namely series and parallel thermoelectric series and wind tunnel air velocity. Data were taken in the form of cool room temperature cold side temperature, hot side temperature, heatsink temperature, and ambient temperature. Thermoelectric connectivity electrically uses series and parallel circuits and is thermally arranged in series. The results showed that the thermoelectric circuit and wind tunnel air velocity affect the performance of the thermoelectric. Thermoelectric with series circuit produces the highest COP absorption compared to the parallel circuit. The highest performance thermoelectric series is obtained at an airspeed of 9.8 m/s. in these conditions the temperature difference (AT) produced reaches 19<sup>o</sup>C. the heat absorption (q<sub>c</sub>) reaches 34.26 watts and the COP reaches 0.89</p>

Air Velocity Regulation in a Wind Tunnel

2001 ◽  
Author(s):  
M. Ebrahimi ◽  
R. Whalley
Keyword(s):  
Wind Tunnel ◽  
Motor Speed ◽  
Air Velocity ◽  
Control Effort ◽  
Performance Requirements ◽  
Naturally Occurring ◽  
Tunnel Model ◽  
Passive Network ◽  
Simple Feedback ◽  
Working Section

Abstract A wind tunnel model, relating fan motor speed and ventilator opening to the air velocity in the tunnel casing and working section, is presented. Regulation, using the naturally occurring outputs such that accurate adjustments in the air velocity at the working section, with prescribed transient, gusting conditions is required. Confined steady state interaction together with minimum control effort expenditure is essential. A simple feedback configuration with passive network compensation is proposed, satisfying these performance requirements thereby.

A Low-Turbulence Wind Tunnel Driven by an Aerofoil-Type Centrifugal Blower

1967 ◽  
Vol 71 (674) ◽  
pp. 132-134 ◽  
Author(s):  
P. Bradshaw
Keyword(s):  
Wind Tunnel ◽  
Centrifugal Force ◽  
Pressure Rise ◽  
Water Pump ◽  
Centrifugal Blower ◽  
Air Velocity ◽  
Peripheral Velocity ◽  
Traditional Arrangement ◽  
Ventilation Systems

In recent years, manufacturers of centrifugal blowers for ventilation systems have abandoned the traditional arrangement of radial vanes shown in Fig. 1(a) for the “backward-aerofoil” arrangement shown in Fig. 1(b), which is the same as a conventional centrifugal water pump. Unlike the older type, the aerofoil-type blower does not depend on “centrifugal force” to produce a pressure rise despite the misleading accounts given in some hydraulics textbooks (the circumferential component of the air velocity is zero at entry and small at exit) although it does depend on the increase in blade peripheral velocity from the entry to the exit (which explains the curious blade arrangement).

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