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Renewable / Green Technologies
| Renewable or Green Technologies seek to minimize the impact on the environment. They can encompass lower energy use, efficient construction practises, and minimal construction material use from remote locations. |
Wind
Turbines - Northland College
| The 20 kW wind Turbine at Northland College supplies power directly to the residence hall or to the utility. We monitored the energy output and operating characteristics. An ideal wind turbine can capture 59% of the wind energy. At Northland the wind turbine has provided as much as 50% of the electricity in an hour. |
Photovoltaic
Solar Power - Northland College
View Data Sample
| Three PV panels augment the power supplied to the residence hall. One panel tracks the sun across the sky each day. One panel adjusts its slope through out the year. One panel is fixed. Single axis and dual axis tracking units capture more energy. |
Thermal Solar Water Heating - Northland College
| Solar collectors preheat water for the hot water needs of three apartments at the residence hall. Normally water heating energy use is proportional to water use. With solar preheat this relationship is disrupted. The graph below shows apartments with and without solar preheat. |
Solar Water Heating O&M Manual
| We reviewed performance of two solar water heating systems at a 100 unit apartment complex and developed an operation and maintenance manual for the systems. The manual included procedures to assess that the system is operating properly based on energy use trends from the utility bills. It also outlined a simple monitoring scheme that the site staff could follow to verify proper operation. |
