Water Power Engineering
Coaley Mill
In 1977 a new OSSBERGER crossflow turbine was installed at Coaley Mill to replace two 19th Century vertical shaft turbines. The advantage of the crossflow turbine is its ability to exploit a wide range of flows efficiently. On 4.85 m head and with flows that vary summer to winter between 100 l/sec & 700 l/sec, up to 24 kW of 3 phase 415 V and single phase 240 V power is generated continuously throughout the year, minimum output 4 kW on dry weather flows.
OSSBERGER crossflow turbine installed in 1977 at Coaley Mill. The turbine here has been running continuously for 30 years, with only an annual shutdown of up to 48 hrs, for maintenance.
Coaley Mill dates from the 12th Century, formerly a corn mill up to the mid 18th Century and it has long been associated with engineering as it thereafter became a spade, shovel and edged tool works.
Sketch of Coaley Mill, 1903, by George H Turner
Coaley Mill, 2002
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