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www.caleffi.comCUTTING-EDGEINNOVATIONIN TEMPERATURE MIXINGCaleffi mixing valves lead the way. From 3/8” under-sink scald protection valves to 3” flanged digital master mixingvalves, we have a full offering for residential and commercial applications. Over 50 years of innovation andglobal experience assure high quality and proven reliability. A wide selection of double union connection types workwith copper, iron, steel and non-metallic pipes. The valves comply with the necessary standards and codes for theU.S. and Canada. CALEFFI GUARANTEED.
FROM THE GENERAL MANAGER & CEODear Plumbing and Hydronic Professional,While relaxing with some friends, someone posed this hypothetical question to the group,“If you awakened tomorrow to find the nation’s electrical grid had become disabled, whatwould you do?” The discussion that followed made for interesting insight into the prioritiespeople set in life, as well as their trust (or distrust) of humanbehavior. How long would food and water be available? Howwould people manage to survive, and who would survive?I suggest posing this question when you get together withfriends. The conversation that’s likely to follow is sure to beinteresting and entertaining.Now substitute “heat exchangers” for “electrical grid” inthat hypothetical question. Would your friends arrive atsimilar conclusions? Those who work with thermal systemsprobably would. Why? Because without heat exchangers theywould realize that many of the devices we take for grantedsimply wouldn’t function. Examples include refrigerators, furnaces, boilers, chillers, airconditioners, dehumidifiers, computers, televisions, coffee makers, ovens, cell phones,TVs, automobiles, and more. Practically every device that manages thermal energycontains some type of heat exchanger. The same is true for electrical power plants —which takes us right back to the original question about the electrical grid!In this issue of idronics we’ll discuss how heat exchangers are used in heating, coolingand plumbing applications. Different categories of heat exchangers are described, as arecommon methods for assessing their performance. Installation details are provided thatensure lasting peak performance. The issue concludes with several examples of howheat exchangers can be applied within hydronic and plumbing systems. Some of theseapplications are common, while others are unique.We hope you enjoy this issue of idronics and encourage you to send us any feedback bye-mailing us at idronics@caleffi.com.An interactive edition of this issue is available at idronics.caleffi.com. The content is fullysearchable and is complimented with video and resource links. Prefer a hard copy? Visit usat www.caleffi.us and click on theicon to register.Mark OlsonGeneral Manager and CEO3
Page 1: TMJOURNAL OF DESIGN INNOVATION FOR
Page 5 and 6: 1. INTRODUCTIONOne of humankind’s
Page 7 and 8: Figure 1-6 Figure 1-8Figure 1-9Figu
Page 9 and 10: Figure 2-4supplemental / auxiliary
Page 11 and 12: Figure 2-6solar thermalcollector ar
Page 13 and 14: Courtesy of Hydroflex Systems, Inc.
Page 15 and 16: Figure 2-15Figure 2-16Courtesy of B
Page 17 and 18: Courtesy of (a) Alfa Laval, and (b)
Page 19 and 20: Figure 2-24Courtesy of Alfa LavalLa
Page 21 and 22: how to account for plate thickness
Page 23 and 24: Figure 2-33Notice that the directio
Page 25 and 26: Figure 2-36Greywater heat exchanger
Page 27 and 28: 3. HEAT TRANSFER FUNDAMENTALSTwo fu
Page 29 and 30: Figure 3-3Heat output (Btu/hr/ft)60
Page 31 and 32: process. The value of (h) varies wi
Page 33 and 34: 4. THERMAL CHARACTERISTICS OF HEAT
Page 35 and 36: ( )q sAF T 4 4− T12 1 2⎡ 1 q =+
Page 37 and 38: 0.00032 ft ⋅sec( ) 1− ( ∆T )
Page 39 and 40: Figure 4-9enters the secondary side
Page 41 and 42: Figure 4-11FINNED-TUBE BASEBOARDout
Page 43 and 44: CC ratio= C ratio min= C minC maxC
Page 45 and 46: Figure 4-13cthe minimum surface are
Page 47 and 48: absorbing heat. The latter is a muc
Page 49 and 50: which to release its heat. However,
Page 51 and 52: 5. INSTALLATION DETAILS FOR HEAT EX
Page 53 and 54:
Figure 5-4aFigure 5-5isolation /pur
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Figure 5-8temperature sensorsetpoin
Page 57 and 58:
6. HEAT EXCHANGER APPLICATIONSThis
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Figure 6-3a Figure 6-3bCourtesy of
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Figure 6-5to/fromspace heatingloadb
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Courtesy of Diversified Heat Transf
Page 65 and 66:
Figure 6-10isolation / flush valves
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Courtesy of Diversified Heat Transf
Page 69 and 70:
Figure 6-14modulating /condensingbo
Page 71 and 72:
Figure 6-15multiple boilerstaging &
Page 73 and 74:
Figure 6-17an existing boiler that
Page 75 and 76:
Figure 6-19pipingbelowfrost lineret
Page 77 and 78:
Figure 6-22air handlersbalancingzon
Page 79 and 80:
APPENDIX B: CALEFFI PLUMBING COMPON
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