Evaluation of the Thermal Performance and Energy Efficiency of CRAC Equipment through Mathematical Modeling Using a New Index COP WEUED
As the world data traffic increasingly grows, the need for computer room air conditioning (CRAC)-type equipment grows proportionally. The air conditioning equipment is responsible for approximately 38% of the energy consumption of data centers. The energy efficiency of these pieces of equipment is c...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-06-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/13/5950 |
| _version_ | 1797411989399535616 |
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| author | Alexandre F. Santos Pedro D. Gaspar Heraldo J. L. de Souza |
| author_facet | Alexandre F. Santos Pedro D. Gaspar Heraldo J. L. de Souza |
| author_sort | Alexandre F. Santos |
| collection | DOAJ |
| description | As the world data traffic increasingly grows, the need for computer room air conditioning (CRAC)-type equipment grows proportionally. The air conditioning equipment is responsible for approximately 38% of the energy consumption of data centers. The energy efficiency of these pieces of equipment is compared according to the Energy Standard ASHRAE 90.1-2019, using the index Net Sensible Coefficient Of Performance (NetSCOP). This method benefits fixed-speed compressor equipment with a constant inlet temperature air-cooled condenser (35 °C). A new method, COP WEUED (COP–world energy usage effectiveness design), is proposed based on the IPLV (integrated part load value) methodology. The IPLV is an index focused on partial thermal loads and outdoor temperature data variation for air intake in the condenser. It is based on the average temperatures of the USA’s 29 major cities. The new method is based on the 29 largest cities worldwide and with data-center-specific indoor temperature conditions. For the same inverter compressor, efficiencies of 4.03 and 4.92 kW/kW were obtained, using ASHRAE 90.1-2019 and the proposed method, respectively. This difference of almost 20% between methods is justified because, during less than 5% of the annual hours, the inlet air temperature in the condenser is close to the NetSCOP indication. |
| first_indexed | 2024-03-09T04:53:25Z |
| format | Article |
| id | doaj.art-cd9e0f86cfc6427aa85cd4cc7956ff28 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T04:53:25Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-cd9e0f86cfc6427aa85cd4cc7956ff282023-12-03T13:08:12ZengMDPI AGApplied Sciences2076-34172021-06-011113595010.3390/app11135950Evaluation of the Thermal Performance and Energy Efficiency of CRAC Equipment through Mathematical Modeling Using a New Index COP WEUEDAlexandre F. Santos0Pedro D. Gaspar1Heraldo J. L. de Souza2Department of Electromechanical Engineering, University of Beira Interior, 6201-001 Covilhã, PortugalDepartment of Electromechanical Engineering, University of Beira Interior, 6201-001 Covilhã, PortugalFAPRO—Professional College, Curitiba 80230-040, BrazilAs the world data traffic increasingly grows, the need for computer room air conditioning (CRAC)-type equipment grows proportionally. The air conditioning equipment is responsible for approximately 38% of the energy consumption of data centers. The energy efficiency of these pieces of equipment is compared according to the Energy Standard ASHRAE 90.1-2019, using the index Net Sensible Coefficient Of Performance (NetSCOP). This method benefits fixed-speed compressor equipment with a constant inlet temperature air-cooled condenser (35 °C). A new method, COP WEUED (COP–world energy usage effectiveness design), is proposed based on the IPLV (integrated part load value) methodology. The IPLV is an index focused on partial thermal loads and outdoor temperature data variation for air intake in the condenser. It is based on the average temperatures of the USA’s 29 major cities. The new method is based on the 29 largest cities worldwide and with data-center-specific indoor temperature conditions. For the same inverter compressor, efficiencies of 4.03 and 4.92 kW/kW were obtained, using ASHRAE 90.1-2019 and the proposed method, respectively. This difference of almost 20% between methods is justified because, during less than 5% of the annual hours, the inlet air temperature in the condenser is close to the NetSCOP indication.https://www.mdpi.com/2076-3417/11/13/5950ASHRAE 90.1data centerIPLVNet Sensible COPAHRI 1361 |
| spellingShingle | Alexandre F. Santos Pedro D. Gaspar Heraldo J. L. de Souza Evaluation of the Thermal Performance and Energy Efficiency of CRAC Equipment through Mathematical Modeling Using a New Index COP WEUED Applied Sciences ASHRAE 90.1 data center IPLV Net Sensible COP AHRI 1361 |
| title | Evaluation of the Thermal Performance and Energy Efficiency of CRAC Equipment through Mathematical Modeling Using a New Index COP WEUED |
| title_full | Evaluation of the Thermal Performance and Energy Efficiency of CRAC Equipment through Mathematical Modeling Using a New Index COP WEUED |
| title_fullStr | Evaluation of the Thermal Performance and Energy Efficiency of CRAC Equipment through Mathematical Modeling Using a New Index COP WEUED |
| title_full_unstemmed | Evaluation of the Thermal Performance and Energy Efficiency of CRAC Equipment through Mathematical Modeling Using a New Index COP WEUED |
| title_short | Evaluation of the Thermal Performance and Energy Efficiency of CRAC Equipment through Mathematical Modeling Using a New Index COP WEUED |
| title_sort | evaluation of the thermal performance and energy efficiency of crac equipment through mathematical modeling using a new index cop weued |
| topic | ASHRAE 90.1 data center IPLV Net Sensible COP AHRI 1361 |
| url | https://www.mdpi.com/2076-3417/11/13/5950 |
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