Study of a Lab-Scale Organic Rankine Cycle for the Ultra-Low-Temperature Waste Heat Recovery Associated With Data Centers
| Autor: | Gerard F. Jones, Sebastian Araya, Amy S. Fleischer, Aaron P. Wemhoff |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Organic Rankine cycle
Waste management Lab scale 0211 other engineering and technologies 02 engineering and technology Computer Science Applications Electronic Optical and Magnetic Materials Waste heat recovery unit 020401 chemical engineering Mechanics of Materials Heat recovery ventilation Environmental science 021108 energy 0204 chemical engineering Electrical and Electronic Engineering |
| Zdroj: | Journal of Electronic Packaging. 143 |
| ISSN: | 1528-9044 1043-7398 |
| DOI: | 10.1115/1.4047843 |
| Popis: | The ongoing growth in data center rack power density leads to an increased capability for waste heat recovery. Recent studies revealed the organic Rankine cycle (ORC) as a viable means for data center waste heat recovery since the ORC uses waste heat to generate on-site, low-cost electricity, which can produce economic benefits by reducing the overall data center power consumption. This paper describes the first experimental and theoretical study of a lab-scale ORC designed for ultralow grade (40–85 °C) waste heat conditions typical of a data center server rack, and it outlines the implementation of a similar ORC system for a data center. The experimental results show thermal efficiencies ranging from 1.9% at 43 °C to 4.6% at 81 °C. The largest contributors to ORC exergy destruction are the evaporator and condenser due to large fluid temperature differences in the heat exchangers. The average isentropic efficiency of the expander is 70%. A second-law analysis estimates a reduction of 4–8% in data center power requirements when ORC power is fed back into the servers at a waste heat temperature of 90 °C. The data from the lab-scale experiment, when complemented by the thermodynamic model, provide the necessary first step toward advancing this type of waste heat recovery for data centers (DCs). |
| Databáze: | OpenAIRE |
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