Ty Newell

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Bronwyn Hall

University of California, Berkeley

Andrew Perchard

Coventry University (coventry.ac.uk)

Ann Feyerherm

Pepperdine University - Graziadio School of Business and Management

Mai T T Thai

HEC Montréal (Ecole des Hautes Etudes Commerciales)

Çiğdem Vatansever

Namik Kemal University

Viacheslav Kuleshov

Stockholm University

Paola Brembilla

Università di Bologna

Margarita Chaves

Instituto Colombiano de Antropología e Historia -ICANH-

Amon Barros

University of Essex

alexandre dormeier freire

Graduate Institute of International and Development Studies (IHEID), Geneva

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Heat transfer and pressure drop during condensation of R152a in circular and square microchannels

Experimental Thermal and Fluid Science, 2013

ABSTRACT The paper reports experimental data for heat transfer and pressure drop during condensat... more ABSTRACT The paper reports experimental data for heat transfer and pressure drop during condensation of R152a in circular and square microchannels with hydraulic diameters of 1.152 mm and 0.952 mm, respectively. Saturation temperatures are 40 °C and 50 °C with mass fluxes varying from 200 to 800 kg/m2 s and vapor mass qualities from 0.1 to 0.9. Effects of mass flux, vapor mass quality and channel geometry on heat transfer and pressure drop were investigated. The results show that heat-transfer coefficients and pressure drop both increase with increasing mass flux and vapor mass quality while decrease with increasing saturation temperature. Channel geometry has much effect on heat transfer at low mass fluxes while has little effect on pressure drop. The present data were compared with earlier empirical correlations and a theoretical solution. Heat transfer coefficients agree within experimental error with several correlations and a theoretical solution for both circular and square microchannels. One pressure drop correlation underestimates the data for the two microchannels while another pressure drop correlation overestimates the data for the square microchannel.

Air Conditioning Systems with Oversped Induction Motors

Adjustable air conditioning control system for a universal airplane ground support equipment cart

Modular Heating, Ventilating, Air Conditioning, and Refrigeration Systems and Methods

$Research paper thumbnail of Refractive index sensor using internally reflective light beams$

Refractive index sensor using internally reflective light beams

Depth Sounding Diagnostic Measurements of Salt Gradient Solar Ponds

Journal of Solar Energy Engineering, 1985

A recording depth sounding instrument has provided several different diagnostic measurements in t... more A recording depth sounding instrument has provided several different diagnostic measurements in the 1000 m2 Research Salt Gradient Solar Pond at Argonne National Laboratory. The sounder has been used to locate gradient zone boundaries and layers of debris within the pond. The instrument has also helped to verify that the presence of salt piles in the bottom of the pond has been responsible for automatically maintaining the constant position of the gradient zone lower boundary during the last three years. Subsurface waves have been observed at the bottom of the gradient zone near the pond side walls. The sounding instrument has also proved capable of identifying density driven plumes and turbulent disturbances within the pond.

Development of a concept inventory for fluid mechanics

33rd Annual Frontiers in Education, 2003. FIE 2003.

Concept inventories are assessment tools designed to determine the degree to which students under... more Concept inventories are assessment tools designed to determine the degree to which students understand the concepts of a subject and to identify the misconceptions that students hold. The results of a concept inventory can be used to change the methods of instruction to overcome student misconceptions. A cooperative effort between Mechanical Engineering faculty at the Universities of Wisconsin-Madison and Illinois, Champaign-Urbana has been directed toward development of a Fluid Mechanics Concept Inventory (FMCI). Fluid mechanics typically follows thermodynamics in the sequence of courses in thermal sciences, involves both the mechanics and dynamics of fluids, and builds on basic physics and Newtonian mechanics. This paper describes the process used for development of the FMCI, the details of how we determined the content, and examples of actual content of the instrument itself.

Ty Newell

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