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Michael Grupp (Synopsis) - EEDAL '06 1
Two worlds in solar water heating -
Draft results of a recent global best-
practice study for the Central Energy
Fund (PTY Ltd)
Michael Grupp, Joan Beall, Hannelore Bergler (Synopsis,
Lodve, France)
Marlett Balmer, Mmathabo Murubata (PDC, Pretoria, RSA)
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Table of contents
SWH for South Africa: import or local production ?
Data base of offers from 13 (out of 29) countries
Analysis of prices and models
Recommendations for incentives without regrets
Remarks on virtual feed-in
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SWH market - supply and demand issues
Supply:
Who wants to export to South Africa ?
Types proposed for export
Prices and conditions Comparison with locally produced models
Demand:
SWH types adapted to the South African market
Income categories and the corresponding SWHtypes
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The Solar Water Heater Types
historically, there was diversity: split systems,
monoblocs, integrated SWH, glazed, unglazed
today, only a few types have survived: splits and
mono-blocs
differents versions of these are available
ISWHs have retired to niches
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The global Solar Water Heater market
Two worlds:
Low-price countries (Group A): mainly simple
small gravity flow, open-loop systems
High-price countries (Group B): all system
types, but mainly sophisticated large, pumped,
closed-loop and expensive systems
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The top seller: the vacuum tube mono-bloc
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The Garden Shower
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The wheel-barrow water heater
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The Shower bag
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The SOLVIS solar heater/sanitiser
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The solar heater/sanitiser - instructions
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Collector aperture and tank volume
Collector aperture distribution (all systems)
0
5
10
15
20
25
30
35
40
0 1 2 3 4 5 6 7 8 9 10 11 12
aperture m
Group A B A/B B/A
S m 3,8 4,1 0,93 1,08
V litre 225 258 0,87 1,15
Tank volume distribution (all systems)
0
5
10
15
20
25
30
35
40
0 5 0 100 150 200 250 300 350 400 450 500 550
tank litres
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Ex-factory prices - high (Group B) and low-
price countries (Group A)
Group A B A/B B/A
Price 626 1809 0,35 2,89Price/m 176 461 0,38 2,62
Price/litre 2,9 6,8 0,43 2,34
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Retail prices - high and low-price countries
Retail prices Group A and B
0
5
10
15
20
0 1000 2000 3000 4000 5000
Euros
Group B
Group A
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Ex-factory prices : order of 100 units
Ex-factory price per unit (100)
0
5
10
15
20
0 500 1000 1500 2000 2500 3000
Euros
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Ex-factory prices per m of collector aperture:
- South Africa and the rest of the world -
Ex-factory price per m collector area (100)
0
5
10
15
20
0 100 200 300 400 500 600 700 800
Euros
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The virtual electricity feed-in by SWH
We all know: feed-in laws cant be applied for heat.
Or can they? In the RSA, SWH mainly replace
electricity in "geysers". Use of a SWH therefore isequivalent to the production of electricity (one could
call this "virtual" electricity feed into the grid)
Why not apply the successful German feed-in law?
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The CEF Solar Water Heater Study
Thanks to CEF/EDC