Design and Development of Portable Solar Power Packs2-Pre-final

7/30/2019 Design and Development of Portable Solar Power Packs2-Pre-final

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Design and development of portablesolar power packs and lighting system .

Project guide :Prof. R.B.Chadge

Project members:

Aditya PantAnamika Rane

Manish Ingle


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CONNECTIONS


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OPERATION OF SYSTEM

Working: The PV Panel converts the Solar Energy into equivalent electrical energy that is in

form of current. The maximum amount of energy generated by PV module isthen collected by charge controller and given to inverter. Inverter has in all 2inputs. One DC i/p from PV Module and one from AC Mains (230V). Invertercompares these two input ratings according to the requirement of Load.

CASE 1) 100% Solar Power Available:

CASE 2) Solar Power Available is Less than LOAD Requirement:

CASE 3) Absence of Solar Energy & NO AC Available:

The output of SPC is given to the UPS that drives the load connected to it. Hencewe make use of Solar Energy to drive our load. As the solar energy is alwaysavailable readily, it doesnt affect the efficiency of the system.


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Mechanical Department Data

Appliance Quantity Consumption (W) Total load ( W )

Tube Light 138 40 5520CFL 32 20 640

Fans 96 80 7680

TOTAL LOAD 13.840 kW


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Total Load = 5520+640= 6160W (Day Load)

Load running for 8 hours= 6160*8

=49.28kW-hr.Inverter output = (load) / ( P.F. x Inver. Effi. )

where : P.F. = Power Factor = 0.94

Inver. Effi. = inverter Efficiency = 0.80

.: Inverter output = ( 49.28)/( 0.94 x 0.80 )= 65.53 kW-hr

Supply from SPV = (load on Inverter ) /( D.F. x Ins. )

Where D.F. = Derating Factor = 0.85

Ins. = Solar Insolation = 5.24 hrs..: Supply from SPV = (65.53 ) / ( 0.85 x 5.24 ) = 14.73 kWp 15kWp


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Using 280 Wppanel :

No. Panels =1 1

3

2 = 54

Using 250 Wppanel :

No. Panels =1 13

2 = 60

Panels

Wattage

No. panels

required

Cost per watt Total cost

280 54 50 7,56000

250 60 82 12,3000

selecting

Inverter required : 65.53 kVA-hr/ 8 hr = 8.19 kVA 10 kVA


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Day Load Calculations for fans

61.44 kW-hr

69.53 kW-hr

15.61 kWp


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Total fan Load = 96 x 80 W = 7680 W (Day Load)

Load running for 8 hours= 7680 * 8

= 61.44 kW-hr.

Inverter output = (load) / ( P.F. x Inver. Effi. )

where : P.F. = Power Factor = 0.94

Inver. Effi. = inverter Efficiency = 0.80

.: Inverter output = ( 61.44 )/( 0.94 x 0.80 )= 69.53 kW-hr

Supply from SPV = (load on Inverter ) /( D.F. x Ins. )

Where D.F. = Derating Factor = 0.85

Ins. = Solar Insolation = 5.24 hrs..: Supply from SPV = (69.53 ) / ( 0.85 x 5.24 ) = 15.61 kWp 16 kWp


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Using 280W panel :

No. Panels =1 1

3

2

= 58 Using 250 W panel :

No. Panels =1 1

3

2 = 64

Panels

Wattage

No. panels

required

Cost per watt Total cost

280 58 50 8,12000

250 64 82 13,12000

Selecting

Inverter required : 69.53 kVA-hr/ 8 hr = 8.69 kVA 10 kVA


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Component List

COMPONENT QUANTITY1. SPV (280Wp) LIGHT: 54 Nos.

FAN : 58 Nos.

2. INVERTER (10kVA) LIGHT: 1

FAN: 1

3. JUNCTION BOX LIGHT: 1

FAN: 1

4. CABLES (10sq.mm, current

capacity=20HP)

LIGHT:15 (These values may

FAN: 15 change as per requirement)

5. MCB LIGHT: 3Nos.

FAN: 3Nos

6. CHARGE CONTROLLER LIGHT: 1

FAN: 1

7. MOUNTING STRUCTURE LIGHT: 1

FAN: 1

6. LOAD TUBELIGHT: 138

CFL: 32 FAN: 96


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Costing for Tubelights and Cfls

COMPONENT COST (Rs.)

1. SOLAR PANELS@ Rs.50/Wp 7,56,000

2. INVERTER@ Rs.10,000 for 1kVA 1,00,000

3. JUNCTION BOX@ Rs.600/piece 600

4. CABLES (for 25meters) 56,250

5. CHARGE CONTROLLER 28800

6. MCB 1380

7. INSTALLATION COST (Approx.) 4,50,000

TOTAL COST 13,93,030


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Costing for Fan

COMPONENT COST (Rs.)

1. SOLAR PANELS@ Rs.50/Wp 8,12,000

2. INVERTER@ Rs.10,000 for 1kVA 1,00,000

3. JUNCTION BOX@ Rs.600/piece 600

4. CABLES (for 25meters) 56,250

5. CHARGE CONTROLLER 28800

6. MCB 1380

7. INSTALLATION COST (Approx.) 4,50,000

TOTAL COST 14,49,030


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Area required

Area of Mechanical Department roof top : 519 sq.meter

Area of single Solar Panel : for 280 kWp = 2 sq.meter

.: total no. of Panels : 54+58 = 112

total maximum area of panels will be = 112 x 2 = 224 sq. meter

.: we can set up a SPV modules on the roof top of Mechanical

Department.


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Savings

Rate per unit= Rs. 12

Cost of 35643 units consumed= Rs 4,27,716

Hence approximately Rs. 4,27,716 would be saved due to

SOLAR LIGHTING SYSTEM.


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PAYBACK

Total cost (light+ fans)= Rs. 28,42,060

Yearly savings = Rs 4,27,716

Payback period = within 7 years


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Other Suggestions

1. Designing a system including both lights and fan.

2. Replacing current Cfl with 12W LED and Tubelights with

20W LED.

3. Considering a pre-decided solar panel output (example:

50kWp) and run the load as the power is generated.


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INSTALLATIONGUIDELINES

a) Install solar modules facing south, if possible. Installations

facing east and west are also possible, although the amount of

power generated will be lower.

b) Check the roof from a southern orientation, and check forobstacles that will cast a shadow. These factors will lower the

amount of power generated.

c) Install in a location that has good sun exposure throughoutthe year. Less power is generated in shaded locations.


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INSTALLATION GUIDELINES

d. Checking the following before installation:

1.Solar modules should not be installed within 12" from theridge or edges of the roof, or within 16" from the eave.

2.Installation is not possible in regions where the wind pressureis more. Check with your local building department to determine ifthis mounting system is in compliance.

3.Installation is not possible in the peripheral shaded area of the

following figure.

4.Do not locate systems near coastal locations or other salt waterlocations or C5 locations as classified by ISO.


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e) ARRAY LAYOUT: The array must be installed at least 16"

away from the eave of the roof and 12" from the sides of the roof.

This border will enhance the wind load resistance of the system.

Measure the perimeter of the roof surface where the array will be

installed.

f) The output of a series string of solar modules is connected

to the input of the inverter. Always install solar modules so that all

elements of the array receive the same amount of sunlight. The

amount of power generated declines dramatically if you connect

solar modules receiving different amounts of light in a string

array, for example, solar modules facing east and solar modules

facing south should not be connected in the same string.


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INSPECTION OF ROOF STRUCTURE:

It is important to inspect the structural integrity of the roof andthe durability of the roof materials. The mounting structure and solar

modules require a strong base for durable and reliable operation inlocal environments.

Inspect the roof surface in the area of the installation for cracks,water leakage, and roofing material quality and uniformity. This isespecially important if the roof is older than 10 years.

Inspect the roof for sags and other abnormalities. A sag or deepdepression in the roof may indicate a structural weakness in thesupport system that may require correction.


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INSPECTION OF THE ROOF SUPPORT SYSTEM:

This may require access to the attic.

Check that all rafters, trusses and other materials are in good condition.

Check for indication of previous water leaks.

Measure the spacing of the rafters or trusses to confirm the dimensions andprepare for the system layout.

Determine the location of the electrical roof penetration and wire run, if wiring isplanned for this area.

Protection against falling objects:

When objects are thrown down from a height of 6 ft or more, appoint asurveillance person on the ground and warn others about falling objects.

Do not allow third parties to enter the work area during construction.

Arrange tools and materials neatly and secure them with ropes, or use bags orother measures to prevent falling objects.


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REFERENCES

A new dimension for solar energy- Kimberly Allen, MIT News

Office

Manual for Solar APLAB

Solar rooftop project, India

Solar electricity handbool- Michael Boxwell

Web sources


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THANK YOU

Date post:	14-Apr-2018
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Design and Development of Portable Solar Power Packs2-Pre-final

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