Grebel students leading the solar revolution

Tuesday, January 25, 2011

It started as an altruistic dream, but almost two years later, a vision for a cleaner and greener Grebel has been realized.

Solar Grebel group picture
A student group began meeting in 2009 with the hopes of taking a more active role in environmental issues in their immediate community. The group named itself Solar Grebel and ultimately proposed a cluster of solar thermal panels on Conrad Grebel University College’s roof to preheat the domestic hot water used for their showers. With the support of Grebel administrators, these driven students researched the project, released the Request for Proposals, selected a supplier, and applied for grants.

Jonathan Van Egmond, one of the founders of the group, found the whole project process invaluable.

When Solar Grebel first formed, we had no idea where to even start. In completing this project, all the students involved learned what it takes to organize a building and energy project, from beginning to end.

Beyond practical knowledge, Madeleine Bonsma’s reason for joining Solar Grebel was to take a step towards saving the world and to help set a good example.

She explains:

We as Westerners grossly misuse our resources, and as a result we desperately need to take action when it comes to environmental and economic justice. Solar Grebel provides a way for students to work towards a sustainable and fair society. This technology will ultimately save Grebel money, and it's a great way for the college to lead by example – we hope that other residences and institutions will see the success of our project and want to try it for themselves.

Not only are the many students who have participated in Solar Grebel in the past two years thrilled to see the results of their hard work, but the entire Grebel community is pleased about this installation. Jonathan thinks a lot of the excitement has to do with seeing the equipment first hand and actually benefiting every day from its use.

Madeleine adds:

People at Grebel are generally conscientious and environmentally aware and are glad to see something like this happening. The most exciting thing has been the installation of the solar thermal panels themselves. That was when everyone realized that it was really going to happen, after all the waiting and the hard work done by students before us.

Pipes, a segment of the Solar Grebel
After several days of construction and installation in chilly December, Grebel’s first solar thermal collector began its endless cycle of heating glycol! Glycol is circulated through pipes that go between a tank in the boiler room and the panels on the roof. City water is passed through the tank and gets pre-heated by the coils of warm glycol before moving on to the boiler. On average, the cold water starts at 10°C. The 30 tube collector on Grebel’s roof will contribute to a 39°C rise after 8 hours of sun, for every 150 litres of water.  

Jeremy Weber of Hydronic Solution and another sponsor of the project says:

With the ever increasing concern regarding our environment and resources over the next number of years we will see solar thermal and other forms of green energy explode into the North American market.

These three solar panels will produce 7.82 megawatt hours which will ultimately contribute to 936.9 metres³ of gas saved annually - about 14% of Grebel’s current load. More importantly, Grebel’s CO2 emissions will be reduced by 1,981 kilograms.

The installers and suppliers, Kittle Mechanical and Air Solutions, who also sponsored this project, states:

At 7,200 BTUs per hour of heat production per collector on a full day of sun, EOS’ evacuated tube solar thermal system provided just the solution the students and administration at Conrad Grebel University College were looking for. The installation of three S30 collectors provided a very cost effective green alternative; one which can be modularly expanded upon in the future and has come in at a fraction of the cost of photovoltaic technology which is still cost prohibitive for many projects.

A diagram showing how Solar Grebel works
Solar Grebel has brought about the first commercial installation of a solar thermal collector in an institutional residence of its kind, and is also the first installation anywhere on the Waterloo campus. With hard work and determination, these motivated students managed to secure donations toward a goal of $47,800. Notable supporters included $10,000 from TD Bank, $5,000 from Grebel administration, $1,500 from student council, and $4,140 in government grants. Students in Ed Janzen’s Sociology class voted to provide $100 to this as the most worthy charitable project during an in-class project.

Madeleine stated:

This tremendous show of support is only the beginning! Once the last $6,000 has been raised, we hope to expand our current 3-panel system over the next several years to a total of 9-12 panels. Also, if Grebel proceeds with a new building, we would like to incorporate this technology in its construction from the get-go. And if, far in the future, we run out of places to put panels, I think Solar Grebel could continue on as a more general group to make Grebel more environmentally friendly.

Solar panel

By Jennifer Konkle