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# Heating system on showers

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Group 4 project on showers at RCNUWC

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### Heating system on showers

1. 1. Heating system on Showers<br />Red Cross Nordic UWC<br />
2. 2. How long do we shower?<br />And...what about you?<br />
3. 3. Methodology <br /><ul><li>Data from 10 people taken for the shower time
4. 4. Two different temperatures of water taken (warm and quite warm water)
5. 5. Use of formula: </li></ul>H= ms∆T<br />where: m=mass; s= specific heat capacity of water ∆T= Change in temperature<br />
6. 6. Process<br /><ul><li>Raw data:
7. 7. Temperature:
8. 8. Average final temperature: 38.7 ºC
9. 9. Volume of water: 350 ml
10. 10. Time taken : 4 seconds
11. 11. Video</li></li></ul><li>Calculation<br /><ul><li>Mass of water: </li></ul>m=dV<br />where: m=mass/d=density/V=volume<br />m=1x350=350g= 0.35kg<br /><ul><li>Change in temperature:</li></ul>∆T= T2 – T1<br /> =38.7- 2.6= 36.1 ºC<br /><ul><li>Specific heat capacity of water: 4180 Jkg-1ºC-1</li></ul>H= ms∆T<br />= 0.35x4180x36.1= 52814.3<br />
12. 12. <ul><li>Calculation for 16.5 minutes shower:</li></ul>H= ms∆T<br /> =52814/4 x 60x16.5<br />=13071539.25 J<br /><ul><li>Energy:</li></ul>E= 13071539.25/3600000<br /> = 3.63 Kwh<br /><ul><li>For all students: </li></ul>E1= 3.63x200 <br />=726Kwh<br />
13. 13. Now If we shower for 10 minutes...<br /><ul><li>Mass of water: </li></ul>m=dV<br />where: m=mass/d=density/V=volume<br />m=1x350=350g= 0.35kg<br /><ul><li>Change in temperature:</li></ul>∆T= T2 – T1<br />=38.7- 2.6= 36.1 ºC<br /><ul><li>Specific heat capacity of water: 4180 Jkg-1ºC-1</li></ul>H= ms∆T<br />= 0.35x4180x36.1= 52814.3<br />
14. 14. <ul><li>Calculation for 10 minutes shower:</li></ul>H = ms∆T<br /> = 52814.3/4 x10x60<br /> = 7922145 J<br /><ul><li>Energy:</li></ul> E= 7922145/3600000<br />= 2.20Kwh<br /><ul><li>For all students: </li></ul>E2= 2.20x200<br /> =440.12KwH<br />
15. 15. Energy Saved<br />Es= E1 – E2<br />= 726-440.12<br />=285.88Kwh<br />
16. 16. Suggestion<br /><ul><li>We are not imposing our thoughts but we would like to suggest that shower for 10 minutes would be reasonable and more importantly it would save 285.88 kwh of energy.
17. 17. THAT Can light up 4765 LIGHT BULBS!
18. 18. Possibility to use Patented Shower Timer : A device which allows full flow for determined time (5-11 mins) and cut the flow by 2/3 when time ends. Timer will restart after 5 mins.</li></li></ul><li>Proposed Model<br />Water goes out<br />Filter<br />Waste water goes into the pipes<br />Pipes<br />Room<br />Bathroom<br />
19. 19. <ul><li>This model can be used because the water after a shower still is warm enough:
20. 20. Average final temperature:</li></ul>At= (F1+ F2)/2<br />=33.8 ºC<br />