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   Online Applications
Sunrise
This tool calculates for all locations and time the azimuth and height angle of the position of the sun as well as sunset and sunrise. For all desired locations it also calculates the time of sunrise and sunset for a whole year. more...

calculator
Different units are used in the energy industry. Who wants to know how many kWh is a BTU or how many PJ is a billion metric tons of crude oil gets perfect assistant here. more...

flags
Temperature in Fahrenheit, length in yard, area in acres and fuel consumption in miles per gallon - custom US units are difficult to use for contries with metric units. Fortunately, the US unit converter gives advice. more...

wind park
This tool provides a rough estimation of the energy gain and the levelised electricity costs. Assistant tools also calculate the wind speed into other heights and estimate the air desnsity in dependence on the temperature and air pressure. more...

pv system
This tool provides a rough estimation of the energy gain and the levelised electricity costs for grid-connected photovoltaic systems at standard inclinations. more...

   Software by HTW Berlin

Greenius: the simulation program for renewable energy projects

Trough View: visualization of a parabolic trough collector

DESIRE: dynamic expandable simulation environment for renewable energy systems



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