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Life-cycle cost analysis for constant-air-volume and variable-air-volume air-conditioning systems
Applied Energy, 2006This study presents a life-cycle cost analysis using detailed load profiles and initial and operating costs to evaluate the economic feasibilities of constant-air-volume (CAV) and variable-air-volume (VAV) air-conditioning systems. The present-worth cost method for life-cycle cost analysis is applied to a sample building located in Adana, Turkey which ...
Mehmet Azmi Aktacir, Orhan Buyukalaca
exaly +3 more sources
Calibration of the High-Volume Air Sampler
American Industrial Hygiene Association Journal, 1969Abstract The use of either a variable voltage transformer (Variac) for regulating the fan speed or resistances has been widely accepted for varying the air flow through a high-volume sampler during calibration. Calibration data for the Staplex high-volume sampler demonstrate that significant differences exist between the calibration results obtained by
D R, Lynam, J O, Pierce, J, Cholak
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Volume Requirements in Air Drilling
Proceedings of Drilling and Rock Mechanics Conference, 1967Abstract This work was carried out to obtain a more realistic method for prediction of bottom-hole pressures and air or gas volumes required in air and gas drilling. The approach presented allows a prediction of the volume of air or gas required to lift particles from the point in the annulus of critical lift: the ...
Roger J. Schoeppel, Ashok R. Sapre
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The shape and volume of air, kernels, and cracks, in a nutshell
2023Walnuts are the second most produced and consumed tree nut, with over 2.6 million metric tons produced in the 2022-23 harvest cycle alone. The United States is the second largest producer, accounting for 25% of the total global supply. Nonetheless, producers face an ever-growing demand in a more uncertain climate landscape, which requires effective and
Erik Amézquita +4 more
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Development of a high-volume air sampler for nanoparticles
Environ. Sci.: Processes Impacts, 2013As a tool to evaluate the characteristics of aerosol nano-particles, a high-volume air sampler for the collection of nano-particles was developed based on the inertial filter technology. Instead of the webbed fiber geometry of the existing inertial filter, wire mesh screens alternately layered using spacing sheets with circular holes aligned to provide
M, Hata +6 more
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Volume Requirements for Directional Air Drilling
IADC/SPE Drilling Conference, 1994ABSTRACT It is highly desired to develop a simple and reliable method for determining the air volume requirements for directional air drilling operations. Using Niku-radse's friction factor correlation for turbulent air flow, Angel's empirical model for determination of air volume requirements for vertical well drilling is modified and ...
Boyun Guo, S.Z. Miska, Robert Lee
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2002
Written by more than 100 international scholars and experts, this encyclopedia chronicles the individuals, equipment, and drama of nearly a century of aerial combat.Air Warfare: An International Encyclopediais the first encyclopedia to document the entire history of aerial combat, from the primitive biplanes of World War I to the sophisticated stealth ...
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Written by more than 100 international scholars and experts, this encyclopedia chronicles the individuals, equipment, and drama of nearly a century of aerial combat.Air Warfare: An International Encyclopediais the first encyclopedia to document the entire history of aerial combat, from the primitive biplanes of World War I to the sophisticated stealth ...
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Volume of Air in a Lethal Venous Air Embolism
Anesthesiology, 2001T J, Toung, M I, Rossberg, G M, Hutchins
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A unit for measuring vessel volumes in the air
Instruments and Experimental Techniques, 2012A unit for determining volumes of intricately shaped vessels, which is based on measurements of the air elasticity, is described. The unit is easy to manufacture and promptly performs measurements of the volume with an error of a few percent or less.
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Effect of air volume fraction on the thermal conductivity of compacted bentonite materials
Engineering Geology, 2021Rawaz Dlawar Muhammed
exaly