ACTIVE HEATING SYSTEMS

1. ACTIVE HEATING SYSTEMS PHYS471 SOLAR ENERGY –I Presented by:Nurcan YANARCAN 2004-05-1 19.10.2004 Instructor:Prof.Dr. Ahmet ECEVIT

2. TABLE OF CONTENT Page • Introduction to Active Heating System ..................... 1 • Main Components of Active Heating System ........... 3 • The Solar Collectors ............................................ 5 • The Solar Storage ................................................ 6 • Auxiliary Source of Heat ....................................7 • Types of Active Solar Heating System ..................... 8 • Liquid Type ......................................................... 9 • Air Type .............................................................. 10

3. Elements of Active Heating Systems ....................... 11 • Heating Elements ............................................... 12 • Exchanger Elements ........................................... 13 • Heat StorageElements ....................................... 14 • Fluid and Air Control Elements ......................... 15 • Temperature Control Elements .......................... 16 • Safety Control Elements .................................... 17 • Advantages of Active Heating Systems .................. 18 • References ............................................................... 19

4. Introduction To Active Heating System An active solar heatingsystem also traps solar energy, and does something to improve the collection, storage, and distribution of that energy. A turtle sunning itself on a rock is an active solar heating system: its blood distributes the energy throughout its body, and this also improves the efficiency of the heat transfer into the turtle by moving cool blood near the heated surface of its shell [1].

5. In this figure ,we can see crosssection of active heating system. Figure 1. Active heating system on a house completely [2] .

6. 2. Main Components of Active Heating System a) The solar collectors b) The solar storage system c) Auxiliary source of heat

7. In figure 2 , systematic of active heating system is shown. Figure 2. Systematics of active heating system [3] .

8. 2. a) TheSolarCollectors The type of collector in figure 3, converts solar radiation into heat energy. Figure 3. Flat-plate collector [4].

9. 2. b) The Solar Storage System Solar systems usually use a specially designed and sized, super insulated tank though it may also be an electric tank. They serve as a tank where the water is pre-heated. In figure 4,you can see easily the storage tank.

10. 2. b) The Solar Storage System Figure 4. Heated water is collected in the storage tank [5].

11. 2. c) Auxiliary Source of Heat Cooled dirty air In this figure,auxiliary source of heat is shown. Hot dirty air Heat Exchanger Living room Heated air Hot fresh air Figure 5. Heated air recycle system.

12. 3. Types of Active Solar Heating System • a) Liquid based heating systems • b) Air based heating systems

13. 3. a) Liquid Based Heating Systems In figure 6,you can see the liquid based heating system. Figure 6. Liquid based system [6].

14. 3. b) Air Based Heating Systems In this figure , you can see air based heating system. Figure 7. Air based system [6].

15. Elements of Active Heating Systems • Heating Elements • Exchanger Elements • Heat StorageElements • Fluid and Air Control Elements • Temperature Control Elements • Safety Control Elements

16. 4. a) Heating Elements In figure 8 , heating system elements are shown. Air based heater Liquid based heater Auxiliary heater Figure 8. Heating system elements.

17. 4. b) Exchanger Elements As you see, in the figure 9 ,exchanger elements are shown. Air based exchanger Liquid based exchanger Figure 9. Exchanger elements.

18. 4. c) Heat StorageElements In figure 10 and in figure 11 , heat storage elements are shown. Figure 10. Water tank [7]. Figure 11. Rock bin [6].

19. 4. d) Fluid and Air Control Elements In this figure , fluid and air control elements are shown. Check valve Valve Air fan Water valve Figure 12. Control elements.

20. 4. e) Temperature Control Elements You can see temperature control elements in figure 13. Thermoresistor Thermostat Figure 13. Temperature control elements.

21. 4. f) Safety Control Elements In figure 14 , safety control elements are shown. Vacuum relief valve Expansion tank Figure 14. Safety elements.

22. Advantages of Active Heating Systems [8] • Easy to install • Inexpensive to purchase • Non exhausted energy source • Friendly for environment

23. References • http://www.newton.dep.anl.gov/askasci/eng99/eng99068.htm • http://www.solaror.org/main.htm • http://www.mashav.com/solar-energy/active.htm • http://www.eere.energy.gov/solar/sh_basics.html#active • http://www.ecn.ab.ca/sesci/tutorial/s_water.htm • http://home.earthlink.net/~jschwytzer/solar.html • www.solar-fit.com/ water.htm • Solar Energy Research, Daniels Farrington, Duffie A. John, 1961, The University of Wisconsin Press.