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International Journal of Energy for a Clean Environment
SJR: 0.195 SNIP: 0.435 CiteScore™: 0.74

ISSN Print: 2150-3621
ISSN Online: 2150-363X

International Journal of Energy for a Clean Environment

Formerly Known as Clean Air: International Journal on Energy for a Clean Environment

DOI: 10.1615/InterJEnerCleanEnv.2013005585
pages 287-307

COOLERADO AND MODELING AN APPLICATION OF THE MAISOTSENKO CYCLE

Benjamin Weerts
National Snow and Ice Data Center, University of Colorado at Boulder, Boulder, Colorado 80309-0428, USA

ABSTRACT

The National Snow and Ice Data Center (NSIDC) recently replaced its traditional cooling system with a new air conditioning system that utilizes an economizer and Coolerado air conditioning units. These units represent one of the first commercially available applications of the Maisotsenko Cycle (M-Cycle). A data logging system was installed that measured the data center's power consumption before and after the cooling system was replaced. This data was organized and used to prove a 90% cooling energy reduction for the NSIDC. The data logging system also collected temperatures and humidities of inlet and outlet air of a Coolerado air conditioner. After using these data to validate a theoretical model developed by researchers at the National Renewable Energy Laboratory, the model was used to simulate slightly modified heat and mass exchanger designs of the Coolerado system to improve performance.
Sensitivity analysis was performed and found a few design parameters that are important to the thermodynamic performance of the Coolerado system, while others were proved insignificant. Overall, it was found that the current design performs reasonably well and with minor modifications could perform optimally, as suggested by the theoretical model.


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