Mississippi State University
Date of Degree
Graduate Thesis - Open Access
Master of Science
James Worth Bagley College of Engineering
Department of Mechanical Engineering
ASHRAE Standard 139 provides parameters which are used in the desiccant industry to calculate the performance of a desiccant dehumidifier. This performance can be obtained from any manufacturer by means of performance curves or selection software. However, these performance parameters are generally rated at sea-level conditions. Although some manufacturers provide a means for estimating the performance at altitude based on sea-level conditions, there is no set methodology that is accepted by all. The scope of this project involves investigating how the performance parameters are affected by altitude and develop a general methodology that can be applied to any desiccant wheel. Mississippi State University and the National Renewable Energy Laboratory both conducted tests and compared the results. It was found that, by keeping mass flow rate, inlet temperature, and inlet humidity ratio constant between sea-level and altitude, the pressure drop through the wheel was influenced the most by altitude.
Jacobs, Kenneth, "Selection of desiccant equipment at altitude" (2011). Theses and Dissertations. 3897.