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Author:Porthin, Henrik
Title:Utveckling av belysning för maskiner i underjordiska kolgruvor
Development of illumination for machines in underground coal mines
Publication type:Master's thesis
Publication year:2014
Pages:36      Language:   swe
Department/School:Insinööritieteiden korkeakoulu
Main subject:Koneensuunnittelu   (K3001)
Supervisor:Ekman, Kalevi
Instructor:Lindholm, Janne
Electronic version URL: http://urn.fi/URN:NBN:fi:aalto-201410042696
OEVS:
Electronic archive copy is available via Aalto Thesis Database.
Instructions

Reading digital theses in the closed network of the Aalto University Harald Herlin Learning Centre

In the closed network of Learning Centre you can read digital and digitized theses not available in the open network.

The Learning Centre contact details and opening hours: https://learningcentre.aalto.fi/en/harald-herlin-learning-centre/

You can read theses on the Learning Centre customer computers, which are available on all floors.

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  • On the desktop of the customer computers, you will find an icon titled:

    Aalto Thesis Database

  • Click on the icon to search for and open the thesis you are looking for from Aaltodoc database. You can find the thesis file by clicking the link on the OEV or OEVS field.

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Location:P1 Ark Aalto  4693   | Archive
Keywords:Ex-d
Ex-m
coal mine
LED
ATEX
IECEx
Ex-d
Ex-m
kolgruva
LED
ATEX
IECEx
Abstract (eng):Underground coal mines are challenging environments to illuminate.
It is dark in the mine and the visibility of coal is poor due to its low reflectivity.
The light may not dazzle and cannot have sharp contrasts in order to preserve night vision.
There are furthermore coal dust and methane gas that can cause explosions, so the lamps also need to be protected against explosions.

This master's thesis examines requirements and recommendations for the illumination of underground coal mines as well as the standards that apply when producing an explosion-proof LED work light for machines and vehicles in underground coal mines.

The thesis examines the basics of photometry and explosion prevention and presents relevant standards and their Ex classifications.
A suitable light pattern for a lamp based on various requirements and recommendations for illumination is presented in the project part of the thesis.
The protection methods Ex-d and Ex-m are compared to each other and one of these is chosen for further development.
The project part then continues with the design of important parts and the selection of materials.
Finally, a heat simulation shows that the housing can, after some changes in the design, in fact be made out of stainless steel despite its poor heat conduction.
Abstract (swe):Underjordiska kolgruvor är krävande miljöer att belysa.
Det är mörkt i gruvan och kol syns dåligt på grund av dess låga reflektivitet.
Samtidigt får ljuset inte blända och ha starka kontraster för att bevara mörkerseendet.
Dessutom finns det koldamm och metangas som kan orsaka explosion så lamporna behöver vara explosionsskyddade.

I det här diplomarbetet undersöks krav och rekommendationer för belysning i underjor-diska kolgruvor, samt standarder som bör följas för att tillverka en explosionsskyddad lampa.
Till diplomarbetet hör också ett produktutvecklingsprojekt av ett explosions-skyddat LED-arbetsljus för fordon och maskiner i underjordiska kolgruvor.

Diplomarbetet behandlar grunderna i fotometri och explosionsskydd och presenterar standarder och deras klassificeringar av Ex-produkter.
I projektdelen presenteras en lämplig ljusbild för en lampa baserat på en mängd krav och rekommendationer för belysning.
Skyddsmetoderna Ex-d och Ex-m jämförs med varandra och sedan väljs en av dessa att gå vidare med i projektet.
Vidare behandlas planering av viktiga delar av lampan och materialval.

Det görs också en värmesimulering av lamphuset som visar att rostfritt stål kan, med vissa designändringar, användas som husmaterial trots dess låga värmeledningsförmåga.
ED:2014-10-05
INSSI record number: 49757
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