The Next Generation Router System Cooling Design

Abstract

Advancements in the networking and routing industry have created higher power electronic systems which dissipate large amounts of heat while cooling technology for these electronic systems has remained relatively unchanged. This report illustrates the development and testing of a hybrid liquid-air cooling system prototype implemented on Cisco's 7609s router. Water was the working fluid through cold plates removing heat from line card components. The water was cooled by a compact liquid-air heat exchanger and circulated by two pumps. The testing results show that junction temperatures were maintained well below the 105°C limit for ambient conditions around 30°C at sea level.The estimated junction temperatures for Cisco's standard ambient conditions of 50°C at 6,000 feet and 40°C at 10,000 feet were 104°C and 96°C respectively. Adjustments to the test data for Cisco's two standard ambient conditions with expected device characteristics suggested the hybrid liquid-air cooling design could meet the projected heat load.v ACKNOWLEDGEMENTS

Neural Machine Translation of Electrical Engineering Based on Integrated Convolutional Neural Networks

“…All the datasets used in this paper are Chinese-English parallel corpora in the field of electrical engineering, mainly collected from certain Chinese and English materials in the field of electrical engineering, including several professional books [18][19][20][21], equipment manuals, literature, and some technical forums and official websites related to electrical engineering. The training set used in the experiment has about 190,000 bilingual parallel corpora, and the validation set and test set each have 2000 bilingual parallel sentence pairs.…”

Thermal Management Roadmap for Energy Efficient Next Generation Telecommunications Equipment

“…The mixture of air and the dielectric vapor flows over an array of heat pipes and the dielectric vapor is then condensed and the liquid is fallen into the liquid collector and finally is pumped into the atomizer for reuse. Cisco also employed the hybrid cooling for the high power system which is the modified 7609 Series (13). The back side of chassis, including the heat exchangers, tubing and the pumps is shown Figure 14.…”

Applying the actual/potential person distinction to reproductive torts

“…Glover names, for example, an interest in being 'able-bodied and healthy'. 26 Therefore, 'the interests of the child should set limits to what potential parents do'. 27 Glover's approach seems to satisfy Lomasky's identifiable individual requirement, it therefore seems that a potential person can in some sense be an identifiable subject.…”

“…26 Therefore, 'the interests of the child should set limits to what potential parents do'. 27 Glover's approach seems to satisfy Lomasky's identifiable individual requirement, it therefore seems that a potential person can in some sense be an identifiable subject. This is, however, an error because potential persons are not subjects; that is, the person (a potential person) cannot be affected by actions which will constitute the person's conditions of existence.…”