Keywords Energy

Low intensity and high variability have limited the use of active solar energy in Canada. Most purposes demand that the energy be concentrated into useful quantities and require either a storage system or a supplemental energy source for nighttime and cloudy days. Technologies have been developed for these purposes, but until recently most of them have been too expensive and too untried for widespread use. The main applications of solar-energy technology in Canada have been for space heating, domestic hot water, and for drying crops and lumber.

Photovoltaic cells are used in some remote areas of Canada to power radio transmitters and navigational aids but have been too expensive for widespread use. Photovoltaic cells are used in many consumer electronic products, such as calculators and watches. Other countries have developed solar systems that produce steam to run conventional electrical generators, but this work has not been pursued in Canada. At northern latitudes, the solar resource is too seasonally variable for exploitation of many energy applications developed elsewhere. North of the ARCTIC CIRCLE, there are periods during the winter when the sun remains below the horizon.

Solar Energy
MacLaren pulp and paper plant at Masson, Québec. Solar panels for pre-heating water (photo by Jim Merrithew).

The Future
The sun delivers solar energy to all parts of Canada. Direct use of this ambient energy minimizes the need for expensive and inefficient transmission and delivery systems. The remote expanses of Canada, where costs of conventional nonrenewable energy are high, offer opportunities for developing and using many cost-effective solar technologies. Although the continuing supply of solar energy is free, the capital cost of capture hardware can be expensive, but if compared to marginal cost of conventional sources it can be cost competitive. However, simple passive-heating systems may only increase the cost of buildings by 1-5%.

Active systems usually require several years of operation to recover the initial cost of operation in fuel savings. Until economic support structures match those for conventional energy sources, solar energy will have difficulty competing in all but remote or small applications. However, once the system is in place, delivery energy costs are stable and immune to market fluctuations that affect conventional nonrenewable energy resources. The Solar Energy Soc of Canada is the national technical organization that promotes education and the dissemination of information on all aspects of solar-energy use. It is affiliated with the International Solar Energy Soc. The Canadian Solar Industries Assn is a manufacturers' organization promoting industrial development.

Author RICHARD KADULSKI

Suggested Reading
J.F. Kreider and F. Kreith, Solar Energy Handbook (1979).

Links to Other Sites
Glossary: Solar Power
Glossary of solar power terms from Sunpark Energy Corp.

Solar Energy Society of Canada Inc.
SESCI promotes the increased use of solar and other renewable energies in Canada.

Energy Council of Canada
The website for the Energy Council of Canada.

Re-Energy.ca
Re-Energy.ca is a hands-on renewable energy learning experience. Building working models of renewable energy technologies allows students in grades 7 through 12 to discover the fundamental principles of biology, chemistry and physics, and to explore the application of science and technology to social and environmental issues.

Race Rocks Ecological Reserve
An extensive website devoted to the Race Rocks Ecological Reserve. Offers detailed information about local First Nations history and present day environmental conservation programs.Produced by Pearson College and partner organizations.