Essays about: "Värmeöverföring"

Showing result 1 - 5 of 36 essays containing the word Värmeöverföring.

  1. 1. A Numerical Study of Melt Pool Heat Transfer in the IVR of a PWR

    University essay from KTH/Fysik

    Author : Yuer Zhao; [2021]
    Keywords : In-vessel melt retention; corium pool; Zr oxidation ratio; melt pool convection; CFD; SST k-ω turbulence model; Smältretention i kärlet; koriumpöl; Zr-oxidationsförhållande; konvektion i en smältpöl; CFD; SST k-ω turbulensmodell;

    Abstract : This thesis aims to provide the thermal condition of melt pool convection by CFD simulation, which is important to the assessment of the invessel melt retention (IVR) strategy widely adopted in Generation III pressurized water reactors (PWRs). As a severe accident mitigation measure, the IVR strategy is realized through external cooling of the lower head of a reactor pressure vessel (RPV). READ MORE

  2. 2. Thermal Properties of a 5G Telecom Equipment Casing Design for Noise Suppression

    University essay from KTH/Skolan för industriell teknik och management (ITM)

    Author : Per Rundström; [2021]
    Keywords : Acoustics; Casing; Shroud; Telecom; Thermal; Akustik; Hölje; Strömningsmekanik; Telecom; Värmeöverföring;

    Abstract : Around the world the implementation of the 5G mobile network is under way. With this latest generation of mobile data transfer comes many advantages compared to the previous generations. One tradeoff however is the reduced range of the transmitting radios due to the higher frequencies of the signal. READ MORE

  3. 3. 3D Printed Lattice Structure for Driveline Applications

    University essay from KTH/Materialvetenskap

    Author : Boyu Xue; [2021]
    Keywords : Lattice structure; AM Additive Manufacturing ; topology optimization; lattice optimization; NVH noise; vibration and harshness ; mechanical performance; lightweight; driveline; natural frequency; Gitterstruktur; AM additiv tillverkning ; topologioptimering; optimering av gitter; NVH buller; vibrationer och obehag ; mekanisk prestanda; lättvikt; drivlina; egenfrekvens;

    Abstract : Lattice structures have received a lot of attention as cellular materials in recent years because of their outstanding properties, such as high strength-to-weight ratio, heat transfer, energy absorption, and capability of improving noise, vibration and harshness (NVH) behavior. This type of structure received a boost from additive manufacturing (AM) technology, which can fabricate geometries in practically any shape. READ MORE

  4. 4. Bubble Dynamics on Artificial Nucleation Sites in Boiling Heat Transfer

    University essay from KTH/Skolan för industriell teknik och management (ITM)

    Author : Yuqing Zhang; [2021]
    Keywords : ;

    Abstract : Pool boiling heat transfer is a complicated scientific problem due to the complex phase change process. In recent years, with the development of nuclear technology, microelectronics and space exploration, more attention has been paid to boiling which present great potentials for the thermal management in these applications because nucleate boiling has much better heat transfer performance than single-phase fluid, while bubbles, including their departure frequency and diameter and the interaction between bubbles plays an important role in determination of the heat transfer performance. READ MORE

  5. 5. Towards a virtual climate chamber – A physical experimental study

    University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Author : Javier Arroyo Molina; [2020]
    Keywords : climate chamber; airflow; experimental characterization; energy; thermal cooling; klimatkammare; luftflöde; experimentell karakterisering; energi; termisk kilning;

    Abstract : This project focuses on experimentally characterizing one of the tools used at Ericsson AB to test product performance, the climatic chamber. By conducting experiments inside the climate chamber and post processing the data obtained, the airflow inside it can be understood and compared to outdoor experimental data. READ MORE