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Uninsulated Pipes of Solar Water Heater - Thermosyphonic System

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Last edited by Joseph Nowarski
December 4, 2017 | History

Uninsulated Pipes of Solar Water Heater - Thermosyphonic System

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Uninsulated pipes of solar waters heaters in Israel increase national electricity consumption by 200 millions kWh/year, 40 millions USD per year. Simple solution having 2-4 months return of investment period can stop this waste.
This work introduces energy balance of thermosyphonic solar water heater (SWH) without pipes' thermal insulation. The results are used for economic evaluation.
Thermal insulation of SWH is required by solar legislation in Israel and national standards. Actually there is not any insulation on SWH pipes. Outside pipes' thermal insulation, if installed, is completely damaged after 1-2 years. Pipes inside buildings usually are in sleeve made of plastic pipe used for electric cables. Plastic sleeves on hot water supply pipes are good equivalent for thermal insulation. However lack of insulation or sleeve on outside circulation pipes increases need for backup resulting in huge national cost.

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Book Details

Table of Contents

1. Glossary
2. Introduction
3. Energy Units
4. Energy Balance of Thermosyphonic SWH with Insulated Pipes
5. Solar Water Heater
6. Energy Output of Solar Collector
7. Monthly Changes of Solar Collector Energy
8. Solar Collector Efficiency
9. City Water (Cold Water) Temperature
10. Storage Tank Average Temperature
11. Circulation Hours
12. Ambient Temperatures in Circulation Hours
13. Water Temperature in Circulation Pipes
14. Hot Water Supply Temperature
15. Water Flow
16. Energy Demand for Hot Water
17. Energy Losses
18. Conservative Approach
19. Formulas, Input Values and Detailed Calculations
20. Pipes Length for Energy Balance
21. Energy in Water Losses in Circulation Pipes (CircEW)
22. Initial Heating of Circulation Pipes Mass (CircM)
23. Heat Transfer in Circulation Pipes (CircHX)
24. Energy of Hot Water in Water Supply Pipe (SupEW)
25. Initial Heating of Hot Water Supply Pipe's Mass (SupM)
26. Heat Transfer in Hot Water Supply Pipe (SupHX)
27. Storage Tank Heat Transfer (STHX)
28. "Other" Losses
29. Sum of Losses
30. Energy Balance of SWH
31. Application of Plastic Sleeve on Outside Pipes
32. National Impact
33. Economic Evaluation
34. References

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December 4, 2017 Edited by Joseph Nowarski Edited without comment.
December 4, 2017 Edited by Joseph Nowarski Added new cover
December 4, 2017 Created by Joseph Nowarski Added new book.