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initial version
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Binaya,
This is a big ask for a photovoltaic system and raises some questions such as how many hours a day will the machine run and where in Africa will it be situated.?
To give you a rough idea of the power budget I have made the following assumptions:
Running time = 10hrs/day
Insolation = 6 hrs pk power/day
Running power of compressor 7kW (few machines run flat out at pk rated power all day)
Basic power needed = 10 x 7kW = 70 kWHr/day
To this you need to consider power losses in the inverter and cabling, say a factor of 1.25 = 87 kWHr/day
If the insolation is 6 hrs pk power/day your system needs to generate 87/6 = 14.5 kW
This is equivalent to 120 panels each with a capacity of 120W.
You'll also need to consider that the inverter needs to be capable of supplying starting current to the machine. Starting current can be significantly higher than running current, depending on the starting system used but worst case would be 5x running current.
Also, depending on your location you will need to factor in battery capacity to take you through cloudy days, rainy season etc
I hope these rough calculations give you some help in specifying your project
Kind Regards
_ _ ... ... _ _
John Jacobs IEng MIET
Ever wanted to throw John out of an aeroplane? sponsor his parachute jump in support of Trussell Trust.
Go to www.justgiving.com/Jumping-John-Jacobs https://www.justgiving.com/Jumping-John-Jacobs to make a donation. Thanks.
John Jacobs Consulting
- john@jacobsconsulting.co.uk john@jacobsconsulting.co.uk
*: +44 (0)1420 87980
*: +44 (0)7817 097741
Skype: john_on_road
www.jacobsconsulting.co.uk https://www.jacobsconsulting.co.uk/
This email and any attachments are confidential. If you are not the intended recipient, dissemination or copying of this email is prohibited. If you have received this email in error, please notify the sender by replying by email and then delete the email completely from your system. It is the responsibility of the recipient to conduct their own security measures and no responsibility is accepted by JJC for loss or damage arising from the receipt or use of this email.
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2 |
No.2 Revision
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Binaya,
This is a big ask for a photovoltaic system and raises some questions such as how many hours a day will the machine run and where in Africa will it be situated.?
To give you a rough idea of the power budget I have made the following assumptions:
Running time = 10hrs/day
Insolation = 6 hrs pk power/day
Running power of compressor 7kW (few machines run flat out at pk rated power all day)
Basic power needed = 10 x 7kW = 70 kWHr/day
To this you need to consider power losses in the inverter and cabling, say a factor of 1.25 = 87 kWHr/day
If the insolation is 6 hrs pk power/day your system needs to generate 87/6 = 14.5 kW
This is equivalent to 120 panels each with a capacity of 120W.
You'll also need to consider that the inverter needs to be capable of supplying starting current to the machine. Starting current can be significantly higher than running current, depending on the starting system used but worst case would be 5x running current.
Also, depending on your location you will need to factor in battery capacity to take you through cloudy days, rainy season etc
I hope these rough calculations give you some help in specifying your project
Kind Regards
_ _ ... ... _ _
John Jacobs IEng MIET
Ever wanted to throw John out of an aeroplane? sponsor his parachute jump in support of Trussell Trust.
Go to www.justgiving.com/Jumping-John-Jacobs https://www.justgiving.com/Jumping-John-Jacobs to make a donation. Thanks.
John Jacobs Consulting
- john@jacobsconsulting.co.uk john@jacobsconsulting.co.uk
*: +44 (0)1420 87980
*: +44 (0)7817 097741
Skype: john_on_road
www.jacobsconsulting.co.uk https://www.jacobsconsulting.co.uk/
This email and any attachments are confidential. If you are not the intended recipient, dissemination or copying of this email is prohibited. If you have received this email in error, please notify the sender by replying by email and then delete the email completely from your system. It is the responsibility of the recipient to conduct their own security measures and no responsibility is accepted by JJC for loss or damage arising from the receipt or use of this email.
|
3 |
No.3 Revision
|
|
Binaya,
This is a big ask for a photovoltaic system and raises some questions such as how many hours a day will the machine run and where in Africa will it be situated.?
To give you a rough idea of the power budget I have made the following assumptions:
Running time = 10hrs/day
Insolation = 6 hrs pk power/day
Running power of compressor 7kW (few machines run flat out at pk rated power all day)
Basic power needed = 10 x 7kW = 70 kWHr/day
To this you need to consider power losses in the inverter and cabling, say a factor of 1.25 = 87 kWHr/day
If the insolation is 6 hrs pk power/day your system needs to generate 87/6 = 14.5 kW
This is equivalent to 120 panels each with a capacity of 120W.
You'll also need to consider that the inverter needs to be capable of supplying starting current to the machine. Starting current can be significantly higher than running current, depending on the starting system used but worst case would be 5x running current.
Also, depending on your location you will need to factor in battery capacity to take you through cloudy days, rainy season etc
I hope these rough calculations give you some help in specifying your project
Kind Regards
_ _ ... ... _ _
John Jacobs IEng MIET
Ever wanted to throw John out of an aeroplane? sponsor his parachute jump in support of Trussell Trust.
Go to www.justgiving.com/Jumping-John-Jacobs https://www.justgiving.com/Jumping-John-Jacobs to make a donation. Thanks.
John Jacobs Consulting
