Building Services Engineering 5th Edition Handbook

408 Appendix
Chapter 3 Heat loss calculations
4. 2330.5 W.
5. 20.112 kW.
6. 12.4 ◦ C.
7. Allowed heat loss per degree Celsius difference inside to outside is 3746.8 W/K; thus the
proposal complies. Proposed heat loss 3407 W/K.
8. 83.14 kW.
9. 43%.
13. R si 0.1 m 2 K/W, Q 50 W, U 2.78 W/m 2 K, R n 6.67 m 2 K/W, 221 mm.
14. R si 0.12 m 2 K/W, Q 19.2 W, 114, 120 mm used, U n 0.29 W/m 2 K, 17.4 ◦ C.
15. R si 0.1 m 2 K/W, Q 20 W, U 1.82 W/m 2 K, extra R a 0.18 m 2 K/W; 81.75, 90 mm used,
U n 0.23 W/m 2 K, new Q 4.83 W, 15.5 ◦ C.
16. 2, 3
17. 4
18. 2
19. 5
20. 4
21. 5
22. 5
23. 2
24. 2
25. 2
26. 3
27. 3
28. 5
29. 4
30. 4
Chapter 4 Heating
11. 0.95 l/s.
12. 2.4 m long × 700 mm high.
13. X 42 mm, Y 35 mm, Z 28 mm, radiator 1 22 mm, radiator 2 28 mm.
14. Expected internal temperature 26.5 ◦ C, system performance is satisfactory.
17. 3
18. 3
19. 4
20. 1
21. 2
22. 1
23. 3
24. 3, 5, 6, 7, 9
25. 2
26. 3
27. 3
28. 2
29. 5
30. 3