Search for dissertations about: "Heat system"

Showing result 1 - 5 of 900 swedish dissertations containing the words Heat system.

  1. 1. System studies of the use of industrial excess heat

    Author : Sarah Broberg Viklund; Magnus Karlsson; Mats Söderström; Semida Silveira; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; excess heat; waste heat; surplus heat; energy systems; greenhouse gas emissions; energy efficiency; energy policy; system studies;

    Abstract : Energy, materials, and by-products, can be exchanged between companies, having positive effects in the form of improved resource efficiency, environmental benefits, and economic gains. One such energy stream that can be exchanged is excess heat, that is, heat generated as a by-product during, for example, industrial production. READ MORE

  2. 2. Efficiency factors for space heating system in buildings

    University dissertation from Umeå : Umeå University

    Author : Christian Brembilla; Thomas Olofsson; Ronny Östin; Mohsen Soleimani-Mohseni; Bjørn Reidar Sørensen; [2018]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Efficiency factors of space heating; hydronic panel radiator; hydronic floor heating; multilayer wall; numerical modelling; room control volume; decrement factor; time delay; heat conduction; heat convection; heat radiation; heat storage; thermal inertia; Euler solver; Newton-Raphson method; synthetic weather file; feedback and feed-forward control strategies; adaptive control; validation methodology; uncertainty bands; robustness of model predictions; thermostatic booth simulator; differential sensitivity analysis; transient model of panel radiator with multiple storage elements; active thermal mass; benchmark performance indicator; linear regression model; calibration through uncertainty bands; hybrid model of low-energy building: law driven data driven; outdoor temperature compensation heating curve; solar radiation model; finite difference method; heat equation;

    Abstract : The thesis focuses on the efficiency of the space heating system. In particular, the efficiency factors measure the efficiency of thermal zone. The efficiency factors measures how the energy is used in a space heating. READ MORE

  3. 3. Performance Analysis and Optimal Design of Heat Exchangers and Heat Exchanger Networks

    University dissertation from Heat Transfer

    Author : Lieke Wang; [2001]
    Keywords : 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;

    Abstract : 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. READ MORE

  4. 4. Solar heat pump systems for heating applications Analysis of system performance and possible solutions for improving system performance

    University dissertation from Heat Transfer

    Author : Stefano Poppi; Per Lundqvist; Chris Bales; Kai Siren; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Solar heat pump systems; techno-economics; solar thermal; system improvements; cost-effectiveness; Energiteknik; Energy Technology;

    Abstract : Solar heat pump systems (SHPs) are systems that combine solar energy and heat pumps. SHPs have been investigated for several decades and have been proven to increase the share of renewable energy and reduce electric energy demand in residential heating applications. READ MORE

  5. 5. Preheating of ambient air by a system of earth tubes as a heat source for buildings

    University dissertation from Heat Transfer

    Author : Carl-Eric Nilsson; [1991]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; earth tubes; preheating of air; corrugated plastic pipes; natural heating; heat extraction by air; fictitious temperature; earth heating; thermal pulses; earth heat exchanger; Heat convection coefficient; heat tubes;

    Abstract : .... READ MORE