Milking System Case Studies
The following case studies show the milking system savings that can be achieved by installing a Variable Speed Drive to control your Vacuum Pump.
The table uses the actual input data from four different sized dairy farms, which Genesis Energy audited.
|Number of cows||270||340||400||1,000|
|Shed type||Herring Bone||Herring Bone||Rotary||Rotary|
|Milking days per year||290||290||290||290|
|Time for morning milk (minutes)||110||130||120||270|
|Time for evening milk (minutes)||90||110||100||210|
|Vacuum Pump Inputs|
|Number of vacuum pumps||1||1||1||1|
|Vacuum pump motor size (KW)||5.6||7.3||11||15|
|Vacuum Pump Requirements|
|Electricity used by vacuum pump (kWh)||5,413||8,468||11,697||34,800|
|Electricity cost of vacuum pump ($)||$920||$1,245||$1,860||$2,958|
|Energy savings by installing a VSD (kWh)||2,490||4,403||5,380||15,660|
|Smart Air™- Waikato Milking Systems Ltd||Varivac™- Corkill Systems||Varivac™- Corkill Systems||Smart Air™- Waikato Milking Systems Ltd|
|Reduction in cost per year||$409||$443||$558||$1,265|
|Simple payback (years)||13.1||14.9||13.1||5.8|
|Electricity Usage Savings (%)||46%||52%||46%||45%|
It is important to note that the above case studies are based on energy savings for a vacuum pump motor alone. Case study savings are based on monitoring and investigations that Genesis Energy has performed on various farms. These are the minimum savings when fitting this type of equipment. The results could vary with the different combinations of pump and motor types.
These savings results will vary between different farms, so to help estimate the energy savings from installing a VSD on your farm, just complete the milking systems section on our Dairy Efficiency Calculator. Please contact the product suppliers to validate the savings calculations and obtain a firm quote for your farm.