Search for dissertations about: "mixing ventilation"

Showing result 1 - 5 of 19 swedish dissertations containing the words mixing ventilation.

  1. 1. Turbulent jets in confined spaces application in mixing ventilation: experimental and numerical studies

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Taghi Karimipanah; Högskolan i Gävle.; [1996]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; turbulent; wall jet; impinging jet; free jet; confinement effect; pressure; throw; experimental; numerical; corner; momentum; mixing ventilation;

    Abstract : The basis of mixing ventilation is the airflow supply to the room by means of jets initiatedfrom the ventilation diffusers. To avoid the draught problem, the design of mixing ventilationmakes uses the throw term, which is defined as the distance to the supply air terminal inwhich the jet centreline mean velocity is decreased to a given value. READ MORE

  2. 2. Air jets in ventilation applications

    University dissertation from Institutionen för byggnader och installationer

    Author : Yue Zou; KTH.; [2001]
    Keywords : Air jet; velocity; ventilation; CFD; measurement;

    Abstract : The purpose of air distribution systems for HVAC is tocreate proper air quality and thermal conditions in an occupiedzone. In mixing type air distribution systems air is suppliedinto a room through various types of outlets and distributed byturbulent air jets. These air jets are the primary factorsaffecting room air motion. READ MORE

  3. 3. A Ventilation Strategy Based on Confluent Jets An Experimental and Numerical Study

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Setareh Janbakhsh; Linköpings universitet.; Linköpings universitet.; Högskolan i Gävle.; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Multiple interacting jets; round jets; confluent jets; wall jet; ventilation strategy; air distribution system; air supply device; ventilation performance; thermal comfort; energy-saving potential; measurement; numerical predictions; RANS turbulence models; renormalization group RNG k– ε ; realizable Re k– ε ; and shear stress transport SST k– ω ;

    Abstract : This study presents air distribution systems that are based on confluent jets; this system can be of interest for the establishment of indoor environments, to fulfill the goals of indoor climate and energy-efficient usage. The main objective of this study is to provide deeper understanding of the flow field development of a supply device that is designed based on wall confluent jets and to investigate the ventilation performance by experimental and numerical methods. READ MORE

  4. 4. Experimental and numerical investigations of a ventilation strategy – impinging jet ventilation for an office environment

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Huijuan Chen; Högskolan i Gävle.; Linköpings universitet.; Linköpings universitet.; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Impinging jet ventilation; room air distribution; thermal comfort; ventilation performance; turbulence modelling; CFD;

    Abstract : A well-functioning, energy-efficient ventilation system is of vital importance to offices, not only to provide the kind of comfortable, healthy indoor environment necessary for the well-being and productive work performance of occupants, but also to reduce energy use in buildings and the associated impact of CO2 emissions on the environment. To achieve these goals impinging jet ventilation has been developed as an innovative ventilation concept. READ MORE

  5. 5. Ventilation Flow Field Characteristics of a Hydro-Generator Model- An experimental and Numerical Study

    University dissertation from ; Chalmers tekniska högskola; Gothenburg

    Author : Hamed Jamshidi; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Naphthalene Sublimation Technique; Hydro Power Generator; Ventilation; Experiment; CFD;

    Abstract : Hydro-generators are complex machines used to convert the mechanical energy of the water turbine into electrical energy. Electromagnetic and mechanical losses accompany this energy conversion process which will cause heat generation and temperature increase. Cooling systems are needed to remove this excess heat from hydro-generators. READ MORE