Sökning: "excess heat"

Visar resultat 11 - 15 av 113 avhandlingar innehållade orden excess heat.

1. 11. Large Heat Networks in District Heating Systems

   Författare :Akram Sandvall; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; MARKAL; Waste heat; Energy system modeling;

   Sammanfattning : District heating (DH) systems have experienced three generations since the 1880s. In chronological order, high temperature steam and pressurized hot water above and below 100 degrees have been used to carry heat over these three generations. LÄS MER

3. 12. Hydrodynamics, Erosion and Heat Transfer in Pressurized Fluidized Beds

   Författare :Jan Wiman; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; hydrodynamics erosion; heat transfer; tubes; fluidized bed; gas flow; pressurized fluidized bed; bubble;

   Sammanfattning : Measurements of hydrodynamics, local tube erosion and local instantaneous bed-to-tube heat transfer were carried out in a cold, pressurized, fluidized bed with different horizontal tube banks. The influence of pressure, fluidization velocity, particle size and tube-bank geometry was studied. LÄS MER

4. 13. Novel process integration opportunities in existing kraft pulp mills with low water consumtion

   Författare :Cecilia Bengtsson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; excess heat; evaporation; pinch technology; pulp and paper; energy; system consequences; process integration;

   Sammanfattning : The economic opportunities for energy savings due to process integration of the evaporation plant have proven to be good in model mills with low water consumption. This is due to the fact that the temperature level of excess heat is higher compared with pulp mills with larger water consumption. LÄS MER

5. 14. Post-Combustion CO2 Capture in Kraft Pulp Mills - Technical, Economic and System Aspects

   Författare :Erik Hektor; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical absorption; Excess heat; Post-combustion; Chilled ammonia; Process integration; Mono-ethanolamine; Pulp and paper; CO2 capture;

   Sammanfattning : As a result of increasing concerns about climate change, there is considerable research and activities around CO2 capture and storage. In this thesis it is studied what role the pulp and paper industry can play in mitigating climate change through CO2 capture and storage. LÄS MER

7. 15. 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