Low Temperature Radiant Cooling and Heating Primer

Transcription

1 Presenter Company Logo Mark Eatherton, Executive Director Radiant Professionals Alliance Low Temperature Radiant Cooling and Heating Primer Breakout Session Category Residential/Hydronics

2 You can t make this stuff up

3

4

5

6

7

8

9

10

11

12

13

14

15 Learning Objectives Objective 1 What is the difference between radiant and convective energy? Objective 2 How important is the emitter when used with GSHP? Objective 3 Is radiant cooling a real option? Objective 4 What about the humidity control? 15

16 Acknowledgements Slides provided by Radiant Professionals Alliance, a division of IAPMO Thank you to IGSHPA for allowing us the opportunity to share our knowledge base with you, the members of IGSHPA. Thank you to the staff of IGSHPA for their assistance in making this presentation happen. 16

17 What is Radiant Heating? A process by which energy leaves the surface of an object and travels to the surface of another (cooler) object in the form of electromagnetic waves RPA FACT: Mean Radiant Temperature (MRT) is the primary factor addressing occupant comfort. RPA FACT: The ONLY correct way to manipulate and control the MRT within a given space is to do so with hydronics. 17

18 Characteristics of Electromagnetic Radiation Air absorbs very little thermal radiation Thermal radiation can be partially reflected Objects with surface temperatures below 970 F give off infrared radiation that s invisible to humans 18

19 Characteristics of Electromagnetic Radiation All electromagnetic radiation travels at the speed of light Thermal radiation is entirely different from nuclear radiation Thermal radiation is not responsible for all the heat released by a radiant panel 19

20 Mean Radiant Temperature 20

21 Heat Loss of the human body 21

22 Different methods of heat delivery 22

23 Different methods of heat transfer 23

24 How new is radiant heating? 24

25 How new is radiant heating? 25

26 Frank Lloyd Wright 26

27 Frank Lloyd Wright 27

28 Frank Lloyd Wright 28

29 Various methods of hydronic radiant floor heating systems 29

30 Recommended low temperature floor applications 30

31 Slab-on-grade System 31

32 Staple Down method in cementitious compound. 32

33 Staple Down in gypsum 33

34 Heat Transmission plates above floor. 34

35 Suspended Tube below floor NOTE: Not recommended for low fluid temperature applications 35

36 Staple Up from below floor NOTE: Not recommended for low fluid temperature applications 36

37 Staple Up from below floor NOTE: Not recommended for low fluid temperature applications 37

38 Engineered Structural floor. 38

39 Temperature range of radiant systems 39

40 Temperature range of heat sources 40

41 Hydronic Ceiling and Wall Systems (Ideal low temperature applications) 41

42 Alternative methods of affecting the MRT within a given space 42

43 Radiant wall plate system 43

44 Radiant Ceiling details 44

45 Hydronic Towel warming radiator 45

46 Distribution methods 46

47 Different Tubing Sizes 47

48 Different Tubing Types 48

49 Typical Tubing Layout 49

50 Distribution Manifold 50

51 Flow Control detail 51

52 Control Wiring Schematic 52

53 Heat Sources 53

54 Various Boilers available (high temperature applications) 54

55 Condensing Boiler 55

56 Water Source Heat Pump 56

57 Simple. 57

58

59 Complicated 59

60 Radiant Cooling 60

61 Conventional Roof Eye Pollution 61

62 Hydronic Roof Eye Candy 62

63 Radiant Cooling Can provide 100% of the Sensible energy removal needs. Can be done with any hydronic based radiant delivery system. Must incorporate a dew point controller to avoid condensation production. Will require minor air movement to control the latent energy portions of cooling loads 63

64 Controlling rh to avoid condensation 64

65 Chilled Beam 65

66 Future System 66

67 Future System 67

68 Future System 68

69 Future System 69

70 Join the RPA Do the math and do your homework. Be introduced to manufacturers who already have a cooling system design program in place. Reduce parasitic energy consumption by up to 50%! Deliver a greater comfort factor. 70

71 For more radiant cooling information, visit. 71

72 JOIN the RPA then click on JOIN button 72

73 Radiant, done right can be a very comfortable, and energy conserving proposition. 73

74 Got Questions? Mark Eatherton Presenter Company Logo 74