• wave roller energy capture

    Ocean waves generate huge amounts of energy and are one of the most omnipotent forces known to mankind. Close to 75% of the earth’s surface is covered by water and if fully exploited, about 40% of the world’s power demand can be satisfied by this – equivalent to the energy produced by as much as 700 average nuclear power plants. This is different from the tidal energy, a kind of energy which is drawn from the equipments placed underwater that capture the movements of the ocean currents resulting from the Earth’s rotation and gravity.

    How is Wave Energy Created?

    When the winds hit the ocean surface, some of the motional (Kinetic) Energy of the wind is transferred to the ocean waves. This is the basic method how waves are created and how energy is imparted to them. Wind energy forms due to the high and low pressures created by the Solar Energy. Hence wave energy as well as the wind energy are grouped under the list of Renewable energy sources.

    How does Wave Power Work?

    Wave energy can be extracted in different ways depending on the type of waves. Onshore and Offshore waves are these types of waves and different methods need to be employed for each to get energy from them. Onshore waves are the waves that are present near the shore. Offshore waves are those waves in the middle of the ocean and move in an up and down motion rather than crashing over themselves.

    There are over a thousand different methods which have received patents, but less than 1% of these methods have been successful. In reality, there are three main methods employed and are the most promising of all:

    Oscillating Water Column:

    This is an onshore device which draws energy from the waves hitting the shore. An oscillating water column is lowered partially into the water. It has a hollow upper part filled with air and is open below the water surface. When the waves crash into the shore , the water level rises up and decreases with the level of waves. When the level of water rises up, the air in the upper portion is compressed and is pushed out of the device. A Well’s turbine is located in the path of air-flow which is rotated by the air and thus produces power. On the other hand, when the water level falls down, vacuum is created in the chamber and this sucks the air into the device. The air which is sucked also flows through the turbine and rotates it. Hence power is produced during both the motions. A well’s turbine is a specially designed turbine whose shaft rotates in the same direction no matter which direction the air flow. A generator is located at the powerhouse which converts this mechanical energy into more useful electrical energy.

    Line absorber:

    The line absorber consists of a series of cylindrical structure, floating on the surface of the ocean rising up and down along with the motion of the waves. This assembly can be best visualized as a giant snake floating on water. Hinges are used to connect the individual parts together. Cables are used to attach the entire device to the seabed, holding it in one place. As the wave approaches the assembly, the unit which touches the crest of the wave rises up and the unit in contact with the lower half goes down. The hinges between the cylinders are connected to pumps contained inside them. The pump pumps oil through pipes to a hydraulic motor as the cylinders move and electricity is generated. This electricity is carried to the land via cables attached to the seabed.

    Buoyancy Point Absorber:

    The buoyancy unit is one which floats on the surface of the ocean and follows the vertical movements of the waves. This floater is linked to a cam-like device which converts the reciprocating movement to the rotational movement of the shaft which produces power. This is by-far the easiest way to extract energy offshore.

    How effective is Wave Power?

    As of now, wind energy is mankind’s biggest renewable source of energy. All ocean energy resources combined would create energy 800 times more powerful than wind. That said, ocean energy is definitely the only hope of mankind’s fast depleting energy resources. When averaged over a square meter, solar energy yields 150 watts, wind energy gives 300 watts while wave energy has the potential to create over 30,000 watts of energy.

    One of our main sources of energy (fossil fuels) is slowly being depleted. We need to take some initiative, so later generations are not stuck with the problems we have left them. Think about it.. those are our kids’ kids. It might seem far away, but we are acting as if it will never happen.

  • lost your domain name

    Last week, I got an email from a client with an interesting request. He wanted to find out if I could help retrieve his domain name which he had stopped renewing two years earlier due to financial constraints. I called him back and explained to him why there was no guarantee that he would get his domain name back and suggested that he considers registering a new one if all didnt go well. He would hear none of that. He wanted his domain name back.

    I threw away my skepticism and went to work. The first thing was to establish if the domain was still active. If it wasn’t active, I would simply place an order through my favorite reseller and voila! The domain would be back to the original owner. Luck was not on my side though. I established through my domain search tool that the domain was active- which meant someone had already registered it and was using it. But all hope was not lost. The second thing I did was to check how the domain was being used. I knew there were two possible scenarios: either the domain was being used as a primary domain on a website or it had been packed for speculative reasons.

    Upon entering the domain name in the address bar, I was taken to a landing page which announced that the domain was on sale. It was both good news and bad news. Good because we had a chance of recovering it, bad because the current owner was probably offering the domain at an inflated rate. I used the contact details provided by whois records and asked how much the domain was going for. He said he was willing to sell it for $700.00.

    I politely informed him that that was too much considering that the previous owner had only paid $10.00 for it. After much back and forth, he agreed to reduce his original price to $250.00. My client was not amused.

    There was no way he was going to spent $250.00 for a domain name. He insisted that there had to be another way around it. Unfortunately for him, the only other solution that came to mind was to wait until the next expiry date of the domain, to see if the current owner would renew it or not. To be honest, this was a long shot. My client agreed after much convincing to buy another domain name as we looked for a way of recovering his other domain.

    In order to avoid the same issue recurring again, we employed the following precautionary steps on the new domain name:

    • Auto renew feature: We used a domain registrar that has the auto renew feature. That way, even when my client forgets to renew the domain in time, the system will automatically renew the domain and charge it to his card.
    • Registrar lock: A registrar lock ensures that no one can edit the DNS records of the domain unless the person first unlocks the domain. This is a security feature that will ensure no one hijacks my client’s domain name
    • Contact information: I also advised my client to provide up to date contact information during the registration of the domain name. The registrar typically uses this contact information to send important communication to the client including billing notifications and invoice reminders.

    Meanwhile, I have placed a back-order on the domain and should it be available at a reasonable price soon, we will buy it again. Only time will tell whether or not that will happen, and based off my experience, unless the domain that is being sought his highly valuable, it is probably worth the time and energy just to begin establishing authority on a new chosen domain, and don’t make the same mistake again of not paying your yearly fees.