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Heat exchanger for energy efficient data center Disclosure Number: IPCOM000219103D
Publication Date: 2012-Jun-19
Document File: 4 page(s) / 341K

Publishing Venue

The Prior Art Database


This new chilled water based heat exchanger in the return path of hot air in a typical data center will absorb the heat energy from hot air passing through it and transfers into water and, the transferred cooled air will travel back to peripheral air conditioning systems. This process will considerable reduce delta value and while discharging the desired chilled air to data centers, air conditioning machines will consume less energy and operate more efficiently.

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Heat exchanger for energy efficient data center

Background of the disclosed

The growth of computer networking and particularly the rapid growth of the high computing resource for myriad business applications have resulted in a rapid increase in demand for server computers. Most commonly these server computers are housed in 19 inch racks. Typically a large number of such racks are housed in a building known as a data centre. In a data centre, one or more large rooms are provided. Each room houses rows of IT equipment racks and, associated cabling and network communication equipment. A modern rack when fully loaded with servers consumes a large amount of electrical power when operating. In consequence, a large amount of waste heat is produced. Many data centres now employ racks of 20 or 25kW to achieve enormous computing power in a smaller footprint, these racks develops equivalent or a little less of waste heat. To avoid damage to the servers by overheating, this waste heat must be removed. In a commonly used arrangement, data centre rooms are cooled by computer room air conditioning units (termed CRACs) which circulate cooled air, this cool air passes through the rack units for heat removal. Typically, a data centre room comprises a raised floor above a plenum chamber through which cooled air will travel which is blown by CRAC units. Rows of server racks are mounted on the floor separated by aisles. Networks of perforated tiles in the floors of the aisles between rows of server racks allow cooled air from the plenum to rise into the aisles. From here it is typically drawn through the front of the racks by fans mounted in the racks. Heated air passes out of the other side of the rack and is drawn up into a roof plenum chamber for removal or recirculation through the CRAC units, this air also know as return air. In a commonly used arrangement, an aisle comprises two rows of server racks whose fronts face each other with the floor of the aisle space between comprising a number of grilles through which cooled air rises. This is termed a cold aisle. Behind each row of racks is a hot aisle to which heated air passes after flowing through the racks and then rises for removal by way of the roof plenum chamber. CRAC units have to operate more powerfully to cool the received hot air to meet the supply air temperature. This process increases the energy bills. (Ex: if supply air temperature is set to 17 degree Celsius and the return temperature is 26 degree Celsius, then CRAC units always have to run powerfully to meet the delta value.). This idea is describing to reduce the delta value and operate CRAC more efficiently.

The increased power requirements of today's computer systems lead to a proportionately increased heat load in data center. Generally, the traditionally installed heating, ventilating, and air conditioning (termed as HVAC) systems are not capable of keeping up-with this growth. Viewed from other aspect, to have a desired cool...