Sökning: "energy efficiency networks"

Visar resultat 11 - 15 av 164 avhandlingar innehållade orden energy efficiency networks.

1. 11. Energy Saving vs. Performance: Trade-offs in Optical Networks

   Författare :Pawel Wiatr; Paolo Monti; Josep Solé-Pareta; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; energy-efficiency; optical networks; RWA; side-effects; device reliability performance; network performance; operational cost; benefits; loss; Informations- och kommunikationsteknik; Information and Communication Technology;

   Sammanfattning : The energy consumption of communication networks is continuously growing. Many energy saving approaches have been proposed at the device, system, and network level. The most promising way to address this problem is to utilize photonic technologies as much as possible thanks to their low energy consumption per bit performance. LÄS MER

3. 12. Building as active elements of energy systems

   Författare :Mehmet Börühan Bulut; Björn Karlsson; Fredrik Wallin; Peter Stigson; Jenny Palm; Mälardalens högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; smart grid; smart home; cooperation; energy; buildings; Energy- and Environmental Engineering; energi- och miljöteknik;

   Sammanfattning : Buildings account for approximately 40% of the energy demand and 33% of the total greenhouse gas emissions in the European Union. Accordingly, there are several efforts that target energy efficiency in buildings both at the European and Swedish levels. The role of buildings in climate change mitigation, however, is not limited to energy savings. LÄS MER

4. 13. Performance Analysis and Optimal Design of Heat Exchangers and Heat Exchanger Networks

   Författare :Lieke Wang; Värmeöverföring; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; applied thermodynamics; Thermal engineering; flexibility; pinch technology; optimization; heat exchanger networks; thermal efficiency; multi-stream; plate-fin heat exchangers; plate heat exchangers; steam condensation; heat exchangers; Termisk teknik; termodynamik; Gases; fluid dynamics; plasmas; Gaser; fluiddynamik; plasma;

   Sammanfattning : This thesis presents a study on performance analysis and optimal design of heat exchangers and heat exchanger networks. The study includes an experimental investigation of steam condensation in plate heat exchangers, optimal design of plate heat exchangers and plate-fin heat exchangers, and optimization of heat exchanger networks. LÄS MER

5. 14. Cooperative Communications : Link Reliability and Power Efficiency

   Författare :Tafzeel ur Rehman Ahsin; Ben Slimane; Xavier Lagrange; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cooperative Communications; Link Reliability; Power Efficiency; Energy Efficiency; Network Coding; Cooperative Relaying; SRA - ICT; SRA - Informations- och kommunikationsteknik;

   Sammanfattning : Demand for high data rates is increasing rapidly for the future wireless generations, due to the requirement ofubiquitous coverage for wireless broadband services. More base stations are needed to deliver these services, in order tocope with the increased capacity demand and inherent unreliable nature of wireless medium. LÄS MER

7. 15. On the Design of Energy Efficient Wireless Access Networks

   Författare :Sibel Tombaz; Jens Zander; Timothy O'Farrell; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy Efficiency; Wireless Access Networks; Backhaul; Network Deployment; Power Consumption Model; Cell DTX; Cost Analysis; Informations- och kommunikationsteknik; Information and Communication Technology;

   Sammanfattning : Wireless access networks today consume 0.5 percent of the global energy. Rapidly growing demand for new services and ubiqutious connectivity, will further increase the energy consumption. LÄS MER