Wheels or caterpillars |
||
a wheel a caterpillar a rocket off road the snow a swamp a tank the space to build functional specifications |
below a bulldozer the weight the load heavy light the power agility a Trench to climb |
a manager a groomer a team to design an engineer to convince the floor a kind of a proposal |
Sustainable development - Geothermal energy |
|
the geothermal systems the heat the geothermal pump the pipes a cycle the earth the frost line balmy a degree a degree Fahrenheit a colder air a heat exchanger. a warm air the solar power the underground |
Ground Loops A ground loop is the mechanism by which a geothermal system gathers the heat from the ground and delivers it to the building (heating cycle) or takes the heat from the building and releases it into the ground (cooling cycle) Heat Pumps A heat pump is nothing more than a refrigeration unit and contains the same basic components found in a refrigerator
|
Sustainable development - Hydropower systems |
|
hydropower a system to flow to produce the mechanical energy although several the ways to produce energy to require a large storage reservoirs the direct current (DC) the hydro turbine the alternating current (AC) Cavitation : Noise or vibration causing damage to the turbine blades as a results of bubbles that form in the water as it goes through the turbine. Draft tube : a water conduit, which can be straight or curved depending upon the turbine installation, Head Vertical change in elevation, expressed in either feet or meters, between the head water level and the tail water level. Flow : volume of water, expressed as cubic feet or cubic meters per second, passing a point in a given amount of time. |
Headwater : the water level above the powerhouse. Low Head : Head of 66 feet or less. Runner the rotating part of the turbine that converts the energy of falling water into mechanical energy. Scroll case a spiral-shaped steel intake guiding the flow into the wicket gates located just prior to the turbine. Small hydro Projects that produce 30 MW or less. Tailrace the channel that carries water away from a dam. Tailwater the water downstream of the powerhouse. Ultra low head Head of 10 feet or less. Wicket gates adjustable elements that control the flow of water to the turbine passage. Penstock : a closed conduit or pipe for conducting water to the powerhouse. |
Sustainable development - Solar cells system |
||
a solar cells photovoltaic cell a light energy a moving parts dependable friendly silent the emission free a suitable a wavelength a hit a photovoltaic cell the silicon to convert to transfer |
a function the photo generation the electrical energy the photovoltaic effect. the field of technology the sunlight the carriers the electron the light-absorbing material the solar modules the photovoltaic arrays the grid to generate a device |
the renewable energy : Particularly useful in situations where electrical power from the grid is unavailable such as in remote area power systems, Earth-orbiting satellites and space probes, remote radiotelephones and water pumping applications.
|
Sustainable development - Solar water heater |
||
a solar cells a solar panel a solar energy the emission free a suitable a wavelength a hit to convert to transfer a device a function the field of technology the sunlight |
the carriers a solar water heater a solar collector a storage tank solar absorber a double walled jacket thermosiphonic flow to be induced a solar radiation a valve a liquid which vapourises at a prescribed temperature the light-absorbing material the solar modules |
the renewable energy :
Solar heating systems are generally composed of solar thermal collectors, a fluid system to move the heat from the collector to its point of usage, and a reservoir or tank for heat storage and subsequent use. the systems may be used to heat domestic hot water, swimming pool water, or for space heating.
|
Sustainable development - Wind turbine |
||
an anemometer a blade the wind speed a controller a turbine blade a brake a rotor emergencies electrically mechanically hydraulically |
a disc brake a gear box a miles per hour a rotation per minute a shaft a rotational speed a generator the high-speed shaft the low-speed shaft a nacelle Pitch |
the hub the yaw drive to applie to blow to damage to require to rotate to stop tubular steel |