Energy Efficiency in the Brewing Industry National Conference on Thermal Energy Management in the Food & Drink Industries pptx

Energy Efficiency in the Brewing
Industry
National Conference on Thermal Energy
Management
in the
Food & Drink Industries
By
Eric Candy
Brewing Industry Energy Efficiency
Areas to be Covered
• Past
• Present
• Future
Drive for Energy Efficiency
Not New
“In short, I expect almost totally to
prevent waste of steam”
James Watt – letter to Dr Lind 1765
Past
Mann’s Brewery Whitechapel
• Brewery on Site from 1808
• Developed in 1880’s with:
• Copper Pans,
• Copper Vapour Heat Recovery,
• Waste Steam from Beam Engine
heating Mash Tuns
• By 1930’s Electricity Generation with
District Heating Scheme
Past
Copper Pans
Courtesy “A

Treatise on the Art
of Brewing” 1820
Past
Copper Pans
Copper with Pans
at Fuller, Smith &
Turner, Chiswick
Mann’s Brewery
Whitechapel
Beam Engine
1867
Mann’s Brewery Whitechapel
Beam Engine 1867
Past
Papers in Brewing Journals
• 1899 Journal Institute of Brewing
• Patent – self return of condensate to
boiler (J Hall)
• Patent – dry residual products of
distilleries in tubes in furnace flue, use
steam to power engines (C Doig)
Past
Papers in Brewing Journals
• 1900 Zeit.ges.Brauw
• Need to control excess air in boiler, coal
requirements 25 to 50 kg brown coal
per Hl by decoction (R Madlener)
Past
Papers in Brewing Journals
• 1902 Journal Institute of Brewing

• Concern over steam leaks, need for
good lagging, finding uses for waste
products (O Overbeck)
• Brewery Refrigeration – need for
insulation, Carbon Dioxide & Ammonia
Primary Refrigerants (G Harrap)
Past
Papers in Brewing Journals
(G Harrap)
Past
Papers in Brewing Journals
(G Harrap)
Past
Papers in Brewing Journals
• 1902 Zeit.ges.Brauw
• Cheaper to generate electricity from
steam engines rather than gas engines
because of both lower fuel cost plus
use of spent steam for other uses (C
Eberle)
Past
Papers in Brewing Journals
• 1903 Zeit.ges.Brauw
• Use spent steam to heat water
• Use flue gas to heat boiler feed water &
mash tun sparging water.
• Condensate returned straight to boiler
(C Eberle)
Past
Papers in Brewing Journals

• 1908 Journal Institute of Brewing
• Coal use 48 lbs to 90 lbs per barrel
• Need to Control Excess Air in Boiler
• Energy can be saved by Pre Heating
Boiler Feed Water, Use of Economisers in
Boiler Flues
• More efficient steam distribution if
superheat the steam
(Maynard)
Past
Papers in Brewing Journals
• 1908 Journal Institute of Brewing
• Gas engine more efficient way of
generating electricity than a steam engine
(Maynard)
Past
Economiser 1910
(Courtesy
Coldharbour
Mill)
Exit
Economiser 1910
Route to Flue
(Courtesy Coldharbour Mill)
Past 1947
Efficient Use of Steam – O Lyle
Copper Vapour Heat
Recovery
Past - Benchmarking Results
UK & Germany

(
Basis for Benchmarking Fuel Ranges Not Known, probably excludes lighting)
Range
Madlener1900 Germany
BrownCoalkg/hl 25 50
EstGCVMJ/kg 17 24
MJ/hl 436 1193
Maynard1908 UK
Coallbs/brl 48 90
EstGCVMJ/kg 32 42
MJ/hl 426 1048
(Low end low Coal GCV, High end high Coal GCV)
Past 1947
Efficient Use of Steam – O Lyle
222 to 229 MJ/hl
(Low end low Coal GCV, High end high Coal GCV)
Existing Process No Heat Recovery
Past 1947
Efficient Use of Steam – O Lyle
124 to 163 MJ/hl
(Low end low Coal GCV, High end high Coal GCV)
No Process Mod Heat Recovery
• Preheat through Refrigeration condenser
• Wort cooling preheat liquor
• Copper Vapour
Past 1947
Efficient Use of Steam – O Lyle
106 to 140 MJ/hl
(Low end low Coal GCV, High end high Coal GCV)