Copyright © 2005 Heathkit Company, Inc. All Rights Reserved Automating and Integrating Residential Systems Presentation 10 – Air Conditioning Simulation

2 Objectives At the end of this exercise, you will be able to:

3 Describe the Peltier effect. Describe how a regular air conditioner works.

4 About This Presentation Our personal comfort is usually very important to us. In this presentation we’ll look at various ways we can cool ourselves.

5 Natural Cooling … One form of cooling is to stop using so much energy. If you want to cool a room, this principle will help there too. Don’t use so much energy.

6 Get away from the heat source. This works for your house too. Open a window if necessary.

7 Be on the breezy side of the house when outside. Open the windows and let the air flow through. Put fans in the windows and attic. Turn on the furnace blower. But what about misting and cooling towers?

8 Misting … Look at all the spray!

9 Ideal for hot dry climates. Courtesy Nevada Mist

10 How does it work? Courtesy Nevada Mist

11 Direct and indirect evaporative coolers. Courtesy U.S. Department of Energy

12 Desiccant Dehumidification – Using materials that attract and hold moisture. Courtesy U.S. Department of Energy Desiccant Dehumidification

13 Chillers Chillers use chilled water to cool air. The chilled water is distributed throughout the building by pipes. The water is cooled in a cooling tower.

14 Absorption Cooling Absorption Cooling – Using a flame or hot steam to generate cooling.

15 Heat pumps cool by moving (or pumping) heat from one place to another. Heat Pumps

16 Air Conditioners Air Conditioners – They work like a refrigerator.

17 Your air conditioner

18 Thermoelectricity Thermoelectricity is the direct conversion of heat into electric energy. Joule’s Law - The relationship between the flow of current through a resistance and the heat dissipated.

19 Thermocouple – A closed loop formed by joining the ends of two strips of dissimilar metals, and if the two junctions of the metals are at different temperatures, an electromotive force, or voltage, is created that is proportional to the temperature difference between the junctions.

20 The Peltier Effect

21 The Peltier Device

22 An edge view

23 The Peltier with heat sinks.

24

Copyright © 2005 Heathkit Company, Inc. All Rights Reserved Automating and Integrating Residential Systems End