Aerostat KITE

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Status: Proposed ProjectBy: BSAeroE Students Batch 2015Address: Lombos Ave. Paraaque CityDate: 04 July 2014

Aerostat Wind Turbine - KITE(Kytoon Instrument and Turbine Electric-generator)

Problem Statement

The modern era is too different compared to our way of life before. In the past, we only use simple methods like sending letters to deliver our messages to other people. But thanks to modernization, the simple turned much simpler. In the present, we use a lot of communication devices namely, our phones, the internet and a whole lot of other means. It has become a part of our daily needs. Using communication devices are already almost the same as breathing. The means of communication though, is mostly powered by electricity. Now, due to being in a tropical region; our country is constantly affected by natural calamities like typhoons. Thus, a large portion of our country tend to experience, if were lucky, temporary blackouts, but if worse, total cut off to electrical power a long period of time. However, if we can provide a good generator using alternative energy, everything changes.

Why Wind Turbine?

When talking about generators, a lot of informed people would recommend using either solar energy or wind energy. Mainly because both are renewable energies which means they are clean, affordable, domestic and effectively infinite. Solar energy is a very good alternative but we wont be able to harness solar energy at night, can we? On the other hand, wind energy is often present where solar isnt. Thus, a wind turbine is the answer to a solar panels lack of efficiency at night and when it is a bit cloudy.

Our Objective

To create and develop a low cost electric-generating machine, which can be deployed at any location, utilizing alternative energy that can be of great use during power shortages and blackouts.

How is this different from other wind turbines and generators?

The Aerostat Wind Turbine uses the same processes as a regular wind turbine which uses mechanical energy and converting it to electric energy. One of the major differences is that it is not being supported by a pole or other ground structures. This wind turbine will float, while tethered, on its own for it to achieve a higher altitude. The higher the altitude, the stronger the wind, the greater the wind energy will be harnessed. Another uniqueness of this wind turbine is that it can be deployed at any location. This wind turbine contains a rechargeable battery or an electric storage which can be used even if the wind turbine isnt under operation. The turbine wont be permanently placed on air. It will only be positioned when the rechargeable battery is depleted already.How about the Airspace Problem?


The Aerostat Wind Turbine is basically a floating wind turbine, which generates limited electricity to supply a designated place which needs it. Its designed to be small enough for us to deploy it easily in certain areas; like PATTS, for example. The Blimp Wind Turbine Generator has four main components: Bladder - A proprietary helium-filled shell made from high performance, industrial fabrics that lifts the turbine up and stabilizes it in the air. Turbine - A lightweight conventional, horizontal axis wind turbine fixed on the bladder. Tethers The lightweight, high strength tethers hold the turbine in place in all weather conditions and transmit power to the ground. Ground Station - The portable ground station which includes a control system, energy bank and some power conditioning equipment.

Main ComponentsBladderMade of gas-tight and durable fabric, the patented shell is inflated with helium. The shell passively aligns into changing winds while channelling wind through the turbine. Aerodynamic lift combines with floating lift to keep it aloft in both strong and weak winds. TurbineThe lightweight, horizontal-axis turbine adapts conventional, proven design used in efficient wind turbines that are currently deployed around the world. The turbine generates electricity both when airborne.TethersTethers are used to connect the shell and turbine to rise on the portable ground station. Tether control is made to adjust turbine altitude, stabilize the turbine in the air, and provide an electrical connection to send power from the turbine to the ground. The control system periodically adjusts based on changing winds to keep the turbine at the optimal altitude for peak energy output and minimal structural loads.Ground StationThe ground station is built on a small platform for easy transport. Craned on the ground station control tether speed and length, and aligns with the bladder to prevent tethers from tangling. A landing pad safely secures the envelope while docked. The power produced by the turbine is conditioned on the ground station.

Conceptual Sketch

Diameter=15 - 20 ft.Power Output=12v-24v; 50-200watts; 0.01-1.5Amps

Volume of a Typical AirshipV = ( L x D x D x 0.52) Where: V = volumeL = lengthD = diameter

Mass lifted = (density air density helium) x volumeVolume needed = 1 kg / (density air density helium)

@Sea Level @ 32 FV = 1,000 ft3 (helium / hydrogen)V = 1,000 ft3 (69.6 lb / 75.1 lb)

30 meter (100 ft)Displaces = 14,137,000 litersLift = 14,000 kg (roughly 31,000 lb)

3 meter balloon (10 ft)

Comparison of Gases1. Hydrogen- more efficient lifting gas- 8% better than helium- leaks more slowly- highly flammable- = 0.8988 kg/m3- lift = 1.2 kg/m3- cheaper- temperature for spontaneous ignition in air is 500 C (932 F)

2. Helium-lift = 1 kg/m3 or 1 g/liter

3. Methane- the lift of hydrogen- 4x the energy density of hydrogen- safer than hydrogen- narrow relative air/fuel mixture for combustion- lift = 45 lb/1000 ft3

Conventional rib-stop nylon (or Silicon coated) - hot air balloons- paragliders- can resist steam up to 120C- if exceeds 120C, it must be replaced by Ethylene Propylene Diene Monomer (EPDM) HydrogenHelium

947 m3877 m3

11.9 m12.2 m

1000 kg 1 kg

Polyurethane Plastic Film

Altitude Pressure (m) (mmHg)(kPa) 0760101.3 75753100.4 15074699.5

Basic Parts

For the Motor

DC Motor (2pcs)

Price:Php650.00 eachSpecifications: 24 volts 3000 rpm Dimensions: Shaft: 110mm Motor Diameter: 60mm Motor Length: 90mm Weight: 1 kgSources:,Position,1-1,1#advertisementDetails

For Battery MaintenanceMPPT Solar Charge Controller 12v, 24v, Auto Switch

Estimated Price:Php1, 400.00Features: Always keeping the battery on fill voltage condition. Prevents the battery from over-charging Prevents the battery from over-discharging Prevents the battery from reverse charging to solar panels during nights Reverse Polarity Protection for Battery Reverse Polarity Protection for Solar Panels When the battery voltage is low, the controller will automatically cut off the load from the system. If the voltage of battery is back to normal and the load will restart working. Thunder protectionSources:,Position,1-15,15#advertisementDetails

For TetheringSteel Cables

Price:8mm diameter =Php35.00/meter10mm diameter=Php42.00/meter

Description:Brand new U.S. made, high strength compacted aircraft cable, steel core, hot dipped galvanized, high strength, flexible, for various applications, like zip line, winch, crane, hoist, pulley and others.

Nylon For AlternativePrice:6.5mm diameter=Php50.00/meter=3,500.00/roll (100 meters)

For Altitude ControlMAURER Hand Winch / Brake Winch

Estimated Price:Php8, 600.00Features: Automatic brake to ensure suspension of load Self- locking brake winches provide additional safety and control for many lifting and pulling jobs. The automatic friction brake supplies constant, positive holding action and prevents runaway load. Brake is fully automatic and the load remains in position anytime when the handle is released. Alloy-steel gear, baked enamel body High Quality - MaurerDimensions: Capacity: 1150 kg Gear Ratio: 10:1 Hub diameter: 83 mm Rope storage: 8 mm x 18 metersSource:,Position,1-9,9#advertisementDetailsFor the Power InverterPure Sine Wave Inverter 1000w

Estimated Price:Php4, 500.00Includes:1000w solar powergrid tieconnectedpower inverter: 12v 24v 48vFeatures: Full protection and audio-visual alarm system Can provide a full range of protection Over-voltage protection Low-voltage alarm Under-voltage protection Over-heat protection Overload protection Short circuit protection Reverse polarity protectionSource:,Position,1-3,3#advertisementDetails

For Power StorageSolar Master - Deep Cycle Battery

Estimated Price:12,000PhpDescriptionThe solar power battery is designed specifically for solar power installations, and other renewable energy installations, particularly those in which it is desirable that maintenance be kept to a minimum. BATCH PROJECT 2015


Application: Microwave Stations Radio Repeaters Any remote or hard to reach installation Any renewable energy installationFeatures: Longer Discharge period and a lower discharge rate Use of