01-07-2016

GREEN POWER TOWER SOLUTIONS BY RAMBOLL

ONE DAY WORKSHOP ON SMALL WIND ENERGY AND HYBRID SYSTEMS & ITS

RELEVANCE TO TELECOM TOWERS

STRUCTURAL SOLUTIONS FOR WIND + SOLAR HYBRID ENERGY FOR TELECOM

GREEN POWER TOWER

Presentation by Yogesh & Ganesh

01-07-2016

GREEN POWER TOWER SOLUTIONS BY RAMBOLL

CONTENTS

RAMBOLL IN BRIEF 1 STUDY OF SOLAR SITES IN BIHAR

2 GREEN POWER TOWER FOR TELECOM SITES

3 GREEN POWER NEXT STEPS

4

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01-07-2016

GREEN POWER TOWER SOLUTIONS BY RAMBOLL

RAMBOLL IN BRIEF

• Established in 1945 in Denmark.

• Globally, 13,000 staff work across 35 countries and 300 offices. In India, over 800 specialists.

• Ramboll is well known for tubular tower designs.

• More than 60 years into tower designs of transmission and telecom in Denmark and overseas.

• Ramboll is ranked No. 1 design firm globally within analysis and design of masts and towers for telecommunication (ENR Survey)

• Ramboll is heading IASS committee (International association for shell and spatial structure) and involved in development of international codes and standards.

• Engineering and management consultancy serving customers across 7 market sectors: Buildings, Telecoms, Transport, Oil & Gas, Energy, Environment, and Management Consulting.

3

IASS Working Group for Masts and Towers

•IASS recommendations for guyed masts

• Eurocode 3: Part 3-1, Towers and masts

• ASCE: “Report on the Dynamic Response of Lattice Towers.”

• ISO standard: “Atmospheric icing on structures”

01-07-2016

GREEN POWER TOWER SOLUTIONS BY RAMBOLL

CAPABILITIES IN ENERGY SECTOR - SOLAR & WIND

• Among top 10 leading energy consultancies

• Services from planning through to engineering design and long-term operation & maintenance

• Sectors:

- Wind energy

- Waste-to-energy

- Thermal power

- District energy

- Power transmission

- Asset management

- Renewable energy

- Energy strategy

01-07-2016

GREEN POWER TOWER SOLUTIONS BY RAMBOLL

OVERALL SITE PHOTO SOLAR PANELS

DG OUT DOOR BTS

STUDY OF SOLAR SITES (BIHAR)

01-07-2016

GREEN POWER TOWER SOLUTIONS BY RAMBOLL

STUDY OF SOLAR SITES (BIHAR) DEMAND & SUPPLY

Assumptions

4 hours from Solar radiation

4 Hours from DG set10 KVA

16 hours from Solar and battery

Load taken as 1 KW.

Site conditions

24 KWh is required per day of this load

4 KWh from solar ( 2KWh from peak 4 hours during summers)

4 KWh from DG (4 hours of DG run)

16 KWh from Battery and solar

In 4 hours of DG run pumping in 20 KWh into battery @ C15 taking 50% to 70% efficiency, get 10 to 14 KWh from Battery is a shortfall of 6 to 2 KWh which would be taken from battery and it would be in partial discharge always.

01-07-2016

GREEN POWER TOWER SOLUTIONS BY RAMBOLL

STUDY OF SOLAR SITES (BIHAR) SUMMARY OF SITES (BIHAR)

Sl. No. Site Name Average Sun Solar Rad.in

(W/m2)

Average Solar panel- O/P

(W/m2)

Average BTS Load-01 (watts)

Average BTS Load-02 (watts)

Total Average load

(watts)

Average Solar O/P (watts)

Average Power difference

(watts)

Recommended panel size for

Solar Contribution 12

Hours (KWp)

1 Naya Haripur 505.3 48 657.11 0 657 757 302.4 2.89

2 Bakrour 420.1 39 366.7 0 412 591 179.2 1.87

3 Mahuari 518.5 34 534 0 534 431 -62 2.89

4 Sisaura* 259.6 5 202.2 0 202 65 -142.7 0.85

5 Shekhpura 218.3 20 767.7 679.2 1514 533 -980.5 6.12

6 Laund 375.8 34 635.6 0 636 456 -209.3 2.89

7 Piprawa 696.8 63 773.7 855 851 -58.9 3.91

8 Sakraicha 612.7 48 655.9 684.4 1427 1295 -173.7 6.12

9 Pachhma 454.69 36 616.9 0 1138 535 -602 2.89

10 KAVAIRA 382.9 32 651.7 0 853 486 -366.6 3.91

*Cloudy Climate

01-07-2016

GREEN POWER TOWER SOLUTIONS BY RAMBOLL

STUDY OF SOLAR SITES (BIHAR) RECOMMENDED SOLAR & WIND (HYBRID) SOLUTION

• It is seen that the load itself is not being fulfilled by the Solar panels and there is no additional energy to charge the batteries during daytime.

• To overcome this short fall either to increase the panel size, install micro wind turbine depending on wind condition.

• For average 1600W load ideal solar panel size is 6kWP (60 sqm area of solar panels).

• Suggested solution would be

• 3kWP from solar (30m^2)

• 3~4.5kWP from wind turbine

• Battery bank to be sized properly based on the panel size, load and Depth of discharge required. Remote monitoring of BB health to be done.

• Automation of cell site to improve uptime and proper monitoring.

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01-07-2016

GREEN POWER TOWER SOLUTIONS BY RAMBOLL

GREEN POWER TOWER FOR TELECOM SITES CONCEPT

• The Green Power Tower is a one stop shopping solution

• The Green Power Tower is specifically developed for

sites with poor or no grid power

• The Green Power Tower is designed for easy transport

and construction.

• The Green Power Tower include everything you need,

except the telecom systems

• The Green Power Tower is flexible and can be adapted to

your requirements and preferences

01-07-2016

GREEN POWER TOWER SOLUTIONS BY RAMBOLL

GREEN POWER TOWER FOR TELECOM SITES STRUCTURAL SOLUTIONS

18 Panel structure on tower

9 Panel structure on tower

Wind turbine on tower

01-07-2016

GREEN POWER TOWER SOLUTIONS BY RAMBOLL

GREEN POWER TOWER FOR TELECOM SITES CONCEPTS TO REALITY (ON SITE)

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Installation of 4kW turbine

in India Installation of 2kW Solar on tower in India

(18 panel solution of 4kW solar under proto)

01-07-2016

GREEN POWER TOWER SOLUTIONS BY RAMBOLL

DESIGN CONSIDERATIONS 1. Two things to be considered for design validation for these small scale

turbines 1. Rotor frequency of the turbine vs structure on which it is

mounted. 2. The load from the turbine of the tower.

2. The global natural frequency of tower and local rotational frequency of top tube used to install the turbine in the top of tower should not coincidence.

3. For utility scale turbines, operating intervals typically range from 10 to 50 rpm correspond to operating frequencies between 0.16 and 0.83 Hz for smaller turbines.

4. The natural frequency of the wind turbine support structure must remain above the largest operating frequency of a particular turbine by an appropriate factor, typically between 1.1 and 2, in order to avoid resonance at any point throughout the turbine’s operational interval.

5. Major business for Opco/IP’s are active sharing and hence installing solar/turbine may reduce tower capacity if it installed on existing tower.

6. Tower design stability shall be dependent on solar/turbine & antenna loading specification and need to be validated on case to case basis.

7. For optimum solution cost of tower structure, preferred to include loads of solar/turbine in the initial design to avoid additional retrofitting costs.

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Typical structure frequency values for reference (Depends on tower geometry and profile sizes.)

# Model 30m 40m 50m 60m

1 3LT_Model 1 1.73 1.33 1.10

2 3LT_Model 2 2.39 1.87 1.56 1.35

3 3LA_Model 1 2.51 1.9 1.51 1.24

4 3LA_Model 2 3.06 2.29 1.84 1.5

5 4LA_Model 1 2.38 1.77 1.42 1.2

6 4LA_Model 2 3.04 2.23 1.82 1.56

Specifications to consider for design • Weight of rotor and total assembly • Rotational speed at cut-in wind speed. • Distance between rotor CoG and first shaft

bearing • How is the turbine regulated? Free to yaw?

Can the blades pitch or does it apply centrifugal breaks when above cut-out wind speed.

• Service life? • Maximum breaking moment for stopping the

wind turbine • Wind turbine thrust coefficient (CT) • Dimensions & Drag coefficient for blades

during parked condition • Vibration controllers

01-07-2016

GREEN POWER TOWER SOLUTIONS BY RAMBOLL

GREEN POWER NEXT STEPS

• Meeting with your experts to fully understand your current and expected requirements and preferences.

• Discussions based on telecom equipment load profiles and expected peak and daily average load from telecom equipment

• Detailed power quality requirements

• Discussions of preferred products and solutions

• Meeting regarding business model

• How can we best support your business?

Ramboll services :

• Tower Design, dimensioning & engineering

• Delivery of tower through preferred fabrication partners

• Project management

• Existing towers design validation (TLVA) for active and energy equipment.

• Technical Trainings

• Software services

We adapt the solutions and services to your requirements and preferences.

01-07-2016

GREEN POWER TOWER SOLUTIONS BY RAMBOLL

THANK YOU

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