NDLI: A new DSS furnace for energy saving in the production of multi-crystalline Silicon

Content Provider	IEEE Xplore Digital Library
Author	Dughiero, F. Forzan, M. Ciscato, D.
Copyright Year	2010
Description	Author affiliation: Dip. Ingegneria Elettrica, University of Padova, Italy (Forzan, M.; Ciscato, D.) \|\| via Gradenigo 6/A, 35126 Padova - Italy (Dughiero, F.)
Abstract	Due to the feedstock amount over the solar cells final cost, the production of low-cost and high quality Si in photovoltaic application is a main topic in PV industrial research. The large grained columnar poly crystalline Silicon obtained via Directional Solidification Systems (DSS) was found to be a convenient alternative to the expensive mono crystal obtained via Czochralski: production costs are much lower and the solar cells efficiency is significantly increased in comparison with the ones obtained via traditional growth. Among the main manufacturers of DSS systems the traditional resistance heating is used both in the phase of melting the raw Silicon and in the phase of re-crystallization in order to maintain the proper temperature gradient between the top and the bottom of the crucible. The induction heating technology could be a valid option, but only few manufacturers use it. In the paper a comparison between the two different technologies used in DSS for the production of columnar poly Si ingots will be presented and discussed: electric resistors and induction furnaces. The former is a well known and widely used technology. The latter is increasing in the last years. Pros and cons are considered for both systems: energy consumption during the whole process, heating up time, melting time, controlled cooling strategies, process regulation and global efficiencies are evaluated using electromagnetic and thermal simulations. The models used are based on real crucibles capacity in order to simulate processes and to compare the two different approaches. In collaboration with an Italian induction heating company a real iDSS prototype has been built and the process is going to be tested.
Starting Page	002165
Ending Page	002170
File Size	2548149
Page Count	6
File Format	PDF
ISBN	9781424458905
ISSN	01608371
e-ISBN	9781424458929
DOI	10.1109/PVSC.2010.5615883
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-06-20
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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