Sökning: "heat recovery efficiency"

Visar resultat 21 - 25 av 100 avhandlingar innehållade orden heat recovery efficiency.

1. 21. Sustainable production of bio-energy products in the sawmill industry

   Författare :Anna Vidlund; KTH; []
   Nyckelord :sawmill industry; energy efficiency; heat recovery; integration; biofuel; upgrading; district heating; fuel pellets; CHP; VOC; CO2;

   Sammanfattning : One of the great challenges facing society is to convert theglobal energy system to a sustainable process. Currently, 80%of the world´s energy is supplied through the combustionof fossil fuels. Not only are the fossil resources limited, theutilisation also increases the level of greenhouse gases in theatmosphere. LÄS MER

3. 22. Thermodynamic aspects and heat transfer characteristics of HiTAC furnaces with regenerators

   Författare :Nabil Rafidi; Wlodzimierz Blasiak; John Witton; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Combustion; flameless; oxy-fuel; heat-recirculation; gas-recirculation; heat transfer; furnace; radiant-tube; regenerative burner; honeycomb; fixed-bed; Thermal energy engineering; Termisk energiteknik;

   Sammanfattning : Oxygen-diluted Combustion (OdC) technology has evolved from the concept of Excess Enthalpy Combustion and is characterized by reactants of low oxygen concentration and high temperature. Recent advances in this technology have demonstrated significant energy savings, high and uniform thermal field, low pollution, and the possibility for downsizing the equipment for a range of furnace applications. LÄS MER

4. 23. Novel Approaches for Retrofitting Heat Exchanger Networks Subject to Varying Operating Conditions

   Författare :Christian Langner; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Multi-Period Optimization; Flexibility; Critical Points; Feasibility; Heat Integration; Process Industry; Energy Efficiency; Retrofit;

   Sammanfattning : The process industry is responsible for a significant share of the final industrial energy use in Sweden. In particular, the pulp and paper industry accounts for more than 50 %. In this context, a number of studies have shown that there is a substantial potential for energy savings in the pulp and paper industry. LÄS MER

5. 24. Improved Energy Efficiency and Fuel Substitution in the Iron and Steel Industry

   Författare :Maria Johansson; Mats Söderström; Henrik Saxén; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; iron and steel industry; energy efficiency; CO2 emissions; fuel substitution; fuel switch; excess heat; biomass gasification; bio-syngas; synthetic natural gas; SNG; energy market scenarios; energy management; barriers; driving forces; järn- och stålindustrin; energieffektivisering; CO2-utsläpp; bränslebyte; överskottsvärme; restvärme; förgasning; bio-syntesgas; syntetisk naturgas; SNG; energimarknadsscenarier; energiledning; hinder; drivkrafter;

   Sammanfattning : IPCC reported in its climate change report 2013 that the atmospheric concentrations of the greenhouse gases (GHG) carbon dioxide (CO2), methane, and nitrous oxide now have reached the highest levels in the past 800,000 years. CO2 concentration has increased by 40% since pre-industrial times and the primary source is fossil fuel combustion. LÄS MER

7. 25. Nano-EngineeredThermoelectric Materials for Waste Heat Recovery

   Författare :Mohsin Saleemi; Muhammet Toprak; Mari-Ann Einarsrud; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : Energy crisis and thermal management related issues have been highlighted in the modern century due to escalating demands for energy consumption and global warming from fossil fuels. Sustainable and alternative energy sources are an ever growing global concern. LÄS MER