Investigation for converting wind farms

Investigation for converting wind farms to CHP systems

Han Yong Lee

Investigation for converting wind farms to CHP systems

Han Yong Lee

A thesis submitted in conformity with the requirements for the degree of

BACHELOR OF SCIENCE MECH. ENG at the University of Manitoba

Supervisor: Dr. E Bibeau Department of Mechanical and Manufacturing Engineering

University of Manitoba 2007

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ABSTRACT The purpose of this report is to demonstrate the feasibility of implementing thermal

storage energy utilizing wind turbine tower structures. The report performs an analysis of the TES (thermal energy storage) in wind turbines. Specifically, diurnal thermal energy storage is implemented in the wind turbine tower, and is able to collect solar energy during the daytime and conserve the heat for use during the following night.

Sodium sulfate decahydrate is used to implement the latent TES in the wind turbine tower. The size of the TES system that would be used is determined by how large or small the communities are in the remote regions. For example, 200 KW wind turbines can be utilized in implementing TES for 3 to 10 residential houses. 10 residential houses need 3,560 MJ/day but due to the 75% efficiency of storage, heat requirement of 10 residential houses can increase up to 4,746 MJ/day. TES systems meet 60% of the required heat demand because of overcast periods thus 10 residential houses could receive 2,136 MJ/day. In order to increase efficiency, evacuated tube collectors and a solar tracking system is used to implement on the wind turbine tower. A conceptual design of the TES system in the wind turbine tower is given by CAD drawing. In the economic aspect of TES in the wind turbine tower, the cost of evacuated tube solar collectors is discussed because they

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are the most expensive components compared to others. The TES in the wind turbine tower could save expenditure of conventional fossil fuels such as oil and propane gas. By doing that, it would reduce CO2 emission.

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ACKNOWLEDGEMENTS I wish to thank Dr. E. Bibeau for his guidance and encouragement throughout the

research of this work. I would also like to acknowledge the technical assistance of P. Zanetel at various stages of this work. In addition, I would like to thank Chulho Chung, Woonseop Choi, Pilsun Song, Changseok Kim, Sungjun Kim and my fellow students for their encouragement. My special thanks to James Na for their constant support and encouragement.

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