The energy that is present in ocean waves can be used to generate electricity that is renewable and free of harmful emissions. Wave power derives from the combination of kinetic energy in the wave (water particle motion) and potential energy (particle elevation). A propagating wave causes water particles to move in an elliptical motion (Figure 1), and this motion can be converted to energy using a variety of mechanical devices. The amount of energy that can theoretically be generated is a function of wave height (elevation difference between crest and trough), wave period (time for the wave to propagate the distance between two crests), and water density.

For an ocean wave height of 3 m (10 ft) wave energy density would be around 36 kW/m (11 kW/ft)...

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The following new energy resources have been added to OWOE's Other Resources page. These are:

• Dezeen - architecture and design magazine that includes a section on EV technology and news
• Energypedia - wiki platform for collaborative knowledge exchange on renewable energy
• Energy Live News - the UK's leading dedicated daily news site covering energy

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Updated the status of coal power generation in the US.

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The following major changes were made to the Platform Sizing Tool:

• Added Japan / Korea location for wind platforms
• Extend limited time offer for free level 4 access to all registered users and eliminated the need to oficially "purchase" the feature

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Updated status of the Swansea Bay Tidal Lagoon project that was recently rejected by the UK government.

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The following major changes were made to the Platform Sizing Tool:

• Added the ability to input additional wind farm parameters which are then used to calculate financial parameters, including Levelized Cost of Electricity (LCOE), Net Present Value (NPV), Internal Rate of Return (IRR), and payback period
• Added the ability to print user's saved scenario data to a csv file for use outside the sizing tool

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In September 2018 Marriott announced that its Courtyard Marriott in Lancaster, Pennsylvania became the first Marriott-branded hotel in the United States to be 100% solar powered. It is also believed to be the first solar array in the country installed for the sole purpose of generating 100% of the electricity needs of a hotel. The 2,700-panel solar array occupies an area of 135,200 square feet or twice the area of a football field and was placed on the roof of a warehouse about half a mile from the hotel. The array produces 1,239 MWh of power annually for the hotel, which consumes 1,177 MWh for its 133 guest rooms. Excess power is sold to the utility. The system is reported to cost $1.5M of which about $0.5M was provided through a state grant, and the...

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