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Heat Transfer Final Project - Roof Ventilation

[TOC]

tags: Coursework Heat Transfer

Links

GitHub Final Presentation - Google Slide

Online Resource

通風球 Whirlybird

冬瓜散熱器

  • 運作原理
  • 冬瓜系列產品有多項專利字號:I570310、I612255、M534210、M538058、M550321、M550385、M544538、M544539、M544540、M551635

Corrugated Iron House

這兩天頂樓或鐵皮屋室內溫度?? - Mobile01

室內溫度 室外溫度 鐵皮屋表面溫度 有隔熱漆鐵皮屋
32 30 50 29.6
35 37
36.5 38
36 37

Simulation

Flow

<iframe width="560" height="315" src="https://www.youtube.com/embed/KfzYUmoMM8o" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe> <iframe width="560" height="315" src="https://www.youtube.com/embed/Vr9A2oVy570" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe> <iframe width="560" height="315" src="https://www.youtube.com/embed/F-u9n6pPd78" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe> <iframe width="560" height="315" src="https://www.youtube.com/embed/TTA0Dd5EYAs" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Convection

<iframe width="560" height="315" src="https://www.youtube.com/embed/p9-coiUAJ6M" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Radiation

<iframe width="560" height="315" src="https://www.youtube.com/embed/SHswx8BVqYA" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

(& Natural Convection)

Result

<iframe width="560" height="315" src="https://www.youtube.com/embed/4DbNsZPg2mA" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Mesh

<iframe width="560" height="315" src="https://www.youtube.com/embed/Gzp4u5S5vo4" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Proposal

候選題目

Troubleshoot

Geometry

https://hawkridgesys.com/blog/flow-simulation-4-starting-flow-simulation-analysis

<iframe width="560" height="315" src="https://www.youtube.com/embed/BeNu4-VUv48" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Step

Before Adjust

Temperature too high due to Computation Domain is too small

General Setting (No Vent)

  • 6 Windows
  • Winds 3 m/s (x direction)
  • G = -9.81 (y direction)
  • Default Tempature = 30(c)

Whirlybird

(單獨模擬的 mesh) (compare to the default mesh on the house)

Local Mesh (6, 6, 6) 1 Vent

(Only Right Top Vent Working)

Local Mesh (5, 5, 5) 1 Vent

CPU time 256 s Total cells 21582 Fluid cells 16802 Solid cells 4780 Fluid cells contacting solids 4299

Local Mesh (4, 4, 5) 8 Vent

Create Mesh 9 min CPU time 2162 s Total cells 111540 Fluid cells 81604 Solid cells 29936 Fluid cells contacting solids 26640 Irregular Cells 6 Trimmed cells 36 Don't know why temperature is not symmetry Temperature of wall still too high

Local Mesh (4, 4, 5) 1 Vent

(4, 4, 5) 1 Vent 20m/s wind

(4, 4, 5) 1 Vent 10m/s wind

冬瓜

Local Mesh (4, 4, 5) 1 Vent

Local Mesh (4, 4, 5) 8 Vent

No Vent (4, 4, 5)

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