# engineering options

#### Turbine Costs

Having analysed the data for different types of turbines received from the manufacturers, the following formulae were derived.

Kaplan Turbine Cost

The relationship between the costs of Kaplan type turbines CK and a flow rate Q in m3/s indicated two different bands.

For flow rates between 0.5m3/s – 5.0m3/s the cost of a turbine can be expressed as below:

CK = 15000 × (Q × H) 0.68      (£, 2008),

or

CK = 3500 × (kW) 0.68             (£, 2008),

For higher flow rates, between 5.0m3/s - 30m3/s, the cost of a Kaplan turbine can be estimated using the following formula:

CK = 46000 × (Q × H) 0.35    (£, 2008)

or

CK = 14000 × (kW) 0.35          (£, 2008)

Francis Turbine Cost

The relationship between the costs of Kaplan type turbines CF and a flow rate Q in m3/s indicated three different bands.

For flow rates between 0.5m3/s –2.5m3/s the cost of a turbine can be expressed as below:

CF1 = 142000 × (Q × H 0.5) 0.07      (£, 2008),

or

CF1 = 122000 × (kW/H 0.5) 0.07       (£, 2008).

For flow rates between 2.5m3/s –10.0 m3/s the cost of a turbine can be expressed as below:

CF2 =282000 × (Q × H 0.5) 0.11      (£, 2008),

or

CF2 = 223000 × (kW/H 0.5) 0.11     (£, 2008).

For flow rates greater than 10.0 m3/s the cost of a turbine can be expressed as below:

CF3 =50000 × (Q × H 0.5) 0.52      (£, 2008),

or

CF3 = 16500 × (kW/H 0.5) 0.52     (£, 2008).

Pelton Turbine Cost

The relationship between the cost of Pelton turbine CP and a flow rate Q in m3/s can be expressed by the following formula:

CP =8300 × (Q × H) 0.54            (£, 2008),

or

CP= 2600 × kW 0.54                     (£, 2008).

To estimate the cost of a turbine (Kaplan, Francis or Pelton), please submit the required information:

 Head* (m): Flow Rate* (m3/sec):