Multi-mode operation and thermo-economic analyses of combined cooling and power systems for recovering waste heat from data centers
Current solutions for waste heat recovery from data centers are mainly district heating and refrigeration. However, intermittent demand for space heating and cooling resulted from seasonal or spatial variations makes inefficient utilization of waste heat. To better harvest the low-grade thermal ener...
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sg-ntu-dr.10356-1619072022-09-26T02:06:43Z Multi-mode operation and thermo-economic analyses of combined cooling and power systems for recovering waste heat from data centers Chen, Xiaoting Pan, Mingzhang Li, Xiaoya Zhang, Ke School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Data Centers Waste Heat Recovery Current solutions for waste heat recovery from data centers are mainly district heating and refrigeration. However, intermittent demand for space heating and cooling resulted from seasonal or spatial variations makes inefficient utilization of waste heat. To better harvest the low-grade thermal energy in data centers, combined cooling and power systems are proposed, with the capability of adjusting the energy output to meet diverse energy demands hourly and seasonally. In total, six cogeneration systems with different configurations are investigated, with the power cycles being either organic Rankine cycle or Kalina cycle, and the refrigeration cycles being vapor compression refrigeration cycle, ejector expansion refrigeration cycle or absorption refrigeration cycle. Depending on the energy demands of data centers, each system has three operation modes: combined cooling and power, power alone and cooling alone. The performance is evaluated in terms of both the thermodynamic and economic performance by parametric study and multi-objective optimization. Results show that the organic Rankine cycle/absorption refrigeration cycle hybrid system has the best thermal-economic performance in all three modes. According to the comprehensive evaluation of the TOPSIS method and the entropy weight method, the energy efficiency at the optima is 58.13%, and the unit cost of product is 4.25 $/GJ, with the net power output of 4.25 kW and the cooling capacity of 150 kW. The work is supported by Dean Project of Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology (No. 2020K009). 2022-09-26T02:06:43Z 2022-09-26T02:06:43Z 2022 Journal Article Chen, X., Pan, M., Li, X. & Zhang, K. (2022). Multi-mode operation and thermo-economic analyses of combined cooling and power systems for recovering waste heat from data centers. Energy Conversion and Management, 266, 115820-. https://dx.doi.org/10.1016/j.enconman.2022.115820 0196-8904 https://hdl.handle.net/10356/161907 10.1016/j.enconman.2022.115820 2-s2.0-85131674155 266 115820 en Energy Conversion and Management © 2022 Elsevier Ltd. All rights reserved. |
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Engineering::Electrical and electronic engineering Data Centers Waste Heat Recovery Chen, Xiaoting Pan, Mingzhang Li, Xiaoya Zhang, Ke Multi-mode operation and thermo-economic analyses of combined cooling and power systems for recovering waste heat from data centers |
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Current solutions for waste heat recovery from data centers are mainly district heating and refrigeration. However, intermittent demand for space heating and cooling resulted from seasonal or spatial variations makes inefficient utilization of waste heat. To better harvest the low-grade thermal energy in data centers, combined cooling and power systems are proposed, with the capability of adjusting the energy output to meet diverse energy demands hourly and seasonally. In total, six cogeneration systems with different configurations are investigated, with the power cycles being either organic Rankine cycle or Kalina cycle, and the refrigeration cycles being vapor compression refrigeration cycle, ejector expansion refrigeration cycle or absorption refrigeration cycle. Depending on the energy demands of data centers, each system has three operation modes: combined cooling and power, power alone and cooling alone. The performance is evaluated in terms of both the thermodynamic and economic performance by parametric study and multi-objective optimization. Results show that the organic Rankine cycle/absorption refrigeration cycle hybrid system has the best thermal-economic performance in all three modes. According to the comprehensive evaluation of the TOPSIS method and the entropy weight method, the energy efficiency at the optima is 58.13%, and the unit cost of product is 4.25 $/GJ, with the net power output of 4.25 kW and the cooling capacity of 150 kW. |
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School of Electrical and Electronic Engineering |
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School of Electrical and Electronic Engineering Chen, Xiaoting Pan, Mingzhang Li, Xiaoya Zhang, Ke |
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Article |
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Chen, Xiaoting Pan, Mingzhang Li, Xiaoya Zhang, Ke |
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Chen, Xiaoting |
title |
Multi-mode operation and thermo-economic analyses of combined cooling and power systems for recovering waste heat from data centers |
title_short |
Multi-mode operation and thermo-economic analyses of combined cooling and power systems for recovering waste heat from data centers |
title_full |
Multi-mode operation and thermo-economic analyses of combined cooling and power systems for recovering waste heat from data centers |
title_fullStr |
Multi-mode operation and thermo-economic analyses of combined cooling and power systems for recovering waste heat from data centers |
title_full_unstemmed |
Multi-mode operation and thermo-economic analyses of combined cooling and power systems for recovering waste heat from data centers |
title_sort |
multi-mode operation and thermo-economic analyses of combined cooling and power systems for recovering waste heat from data centers |
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2022 |
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https://hdl.handle.net/10356/161907 |
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