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Figure 3-3. Primary energy savings - Comparison of system with throttling valve to a system with a work recovery expander. 3.3. Energy Savings with Increase in Data Center Supply Temperature Conventional data centers such as the Purdue MATH data center uses chilled water of ~6° C. However, according to the new ASHRAE guidelines data centers can be operated at higher temperatures. Thermal guidelines have been evolving to address the growing concerns of energy efficiency. Steinbrecher & Schmidt (2011) summarize the evolving thermal guidelines to include wider temperatures and humidity ranges. The article discusses the changes in both the air cooling and liquid cooling guidelines. The new liquid cooling guidelines are listed in Table 3-1. Class W1 and W2 consist of data centers, which are typically cooled using chillers and a cooling tower, but depending on data center location uses an optional water-side economizer to improve energy efficiency. 29PDF Image | CO2 HEAT PUMPS FOR COMMERCIAL BUILDING APPLICATIONS
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CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
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