8/27/2015 1. 2 ENERGY VS EFFICIENCY Bob Witt CPD.

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ENERGY VS EFFICIENCYENERGY VS EFFICIENCYBob Witt CPD

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Introduction Introduction

WHAT IS A BTU?

LEARN WHEN YOU CAN ACHIEVE HIGH EFFICIENCIES

LEARN WHAT IS REQUIRED IN YOUR DESIGN TO REACH THESE GOALS

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AgendaAgenda

REVIEW BASICS OF ENERGY 10minTIME LINE OF EVENTS 15 minWATER CONDITIONS 10min“BAD HABITS” TOUGHT NOT

LEARNED a lifetimeHIGH MASS CARRY-OVER TO LOW

MASS DESIGN 10 minSUMMARY PART 1 15 min

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OVERVIEWOVERVIEW

ENERGY IS GENERIC AND WILL PERFORM AS PHYSICS

WORK WITH THE BASICS TO ENHANCE YOUR DESIGN

point

rise>T

dewH2O

btu

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VOCABULARYVOCABULARY

BTU

THERMAL LIFT

T TEMPERATURE RISE

WHERE DOES HIGH EFFICIENCY COME FROM? “LATENT HEAT”

WHAT IS LATENT HEAT?

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TERMSTERMS

EXOTHERMIC TCO2 H20CONDENSATENOX SOXDEW POINTSDESIGN TEMPERATURE

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TIME LINETIME LINE

MOM & POPJIMMY CARTERUNCLE SAMCODES AND STANDARDSAIR QUALITYGO GREENVENT CATEGORIESBAD HABITS

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TIME LINE TOPICSTIME LINE TOPICS

DATE CATEGORY EFFICIENCY STACK TEMPERATURE RETURN WATER TEMP DEW POINTS OPERATING TEMPERATURE CODES BAD HABITS

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Understanding ANSI StandardsUnderstanding ANSI StandardsUnderstanding ANSI StandardsUnderstanding ANSI Standards

II

IIII

IVNegative Positive

NFGC Airtight

AirtightCorrosion Resistant

Corrosion Resistant

Non-condensing

Condensing

VENTINGVENTING

Static Pressure in Vent

Above Dew Point

Below Dew Point

130 deg F

Effect of Inlet Water Temperature to Boiler EfficiencyEffect of Inlet Water Temperature to Boiler Efficiency

1801804040 130130

inlet water temperatureinlet water temperature

boi

ler

effi

cien

cy, %

boi

ler

effi

cien

cy, %

8080

100100

8686

9494

condensing boilercondensing boiler non-condensing boilernon-condensing boiler

dew pointdew point

natural gas = 1050 Btu/ftnatural gas = 1050 Btu/ft33

8080

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CSA TO TEST ALL CAT IVCSA TO TEST ALL CAT IV

ALL CATEGORY IV EQUIPMENT TO BE TESTED AT FULL INPUT AT 180°

NEW A/Q REGULATIONS TO 9 ppm CO2 AS OF 2012

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BAD HABITSBAD HABITS

JUST BY THE WAY IT IS PLUMBED IT MAY OR MAY NOT WORK

NON-CONDENSINGCONDENSINGCROSSED SYSTEMS

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SPECIFY FACTORY START-UPSPECIFY FACTORY START-UP

AS BUILT PERFORMANCEDOES IT MEET THE REQUIREMENT?DOES MATERIAL MATCH SPEC?DO T’s MATCH DESIGNPERMANENT RECORD

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VALUE ENGINEERINGVALUE ENGINEERING

IDENTICAL PRODUCT

IDENTICAL VALUE

IDENTICAL PERFORMANCE

IDENTICAL APPEARANCE

PERFORMANCE VALUE IS EQUAL TO

PREFORMANCE IS BETTER THAN

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SUMMARY PART ISUMMARY PART I

HIGH EFFICIENCY COMES FROM?

THE DEW POINT IS?

LIME DROPS OUT --------&------------?

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BREAK TIMEBREAK TIMEEND OF PART ONE

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TECHNOLOGYTECHNOLOGY

BURNER

HEAT EXCHANGER

CONTROLS

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CONDENSING TECHNOLOGYCONDENSING TECHNOLOGY

INSIDE THE COMBUSTION CHAMBER

OUTSIDE THE COMBUSTION CHAMBER

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BURNERSBURNERS

ATMOSPHERICFAN ASSISTEDGUNPULSEFeCrAlYDIRECT CONTACT

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COMBUSTION TECHNOLOGYCOMBUSTION TECHNOLOGY

ATMOSPHERICFAN ASSISTEDGUNPULSESYMETRIC AIR- FUEL COUPLING

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Air/Fuel CouplingAir/Fuel Coupling

gasgasvalvevalve

gas

gas

PPGG= = PPAA

PPAA

PPGG

airair

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WATER HEATER PROBLEMSWATER HEATER PROBLEMS

TRADITIONALLY ON/OFFWATER QUALITYOPERATING BELOW THE DEW

POINTSCALINGREPLACEMENTMASS

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Pounds of Lime Deposited vs.... Pounds of Lime Deposited vs.... Temperature and Water UsageTemperature and Water Usage

0

30

60

90

120

150

180

210

0 300 900 1500 2100 2700 3300 3900WATER USAGE IN GALLONS PER DAY

PO

UN

DS

OF

LIM

E D

EP

OS

ITE

D

PE

R Y

EA

R

180oF

170oF

160oF

150oF

140oF

120oF

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HEAT EXCHANGERSHEAT EXCHANGERS

TANKSPIRALHELICAL COILHELICAL FIRE TUBE flex vs. non-

flexDIRECT CONTACT ss woolCOPPERINDIRECT

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SCALE PREVENTIONSCALE PREVENTION

PASSIVE VS ACTIVE PASSIVE VS ACTIVE Tank heaters Spiral Helical flue tube Helical fire tube Direct contact Electric Wall hung Indirect

Copper Tube

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CONTROLSCONTROLS

ON OFFMODULATIONCLAMPINGHEAT- BANDSNIGHT SET BACKSNETWORKSEMS

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LOW TEMP SYSTEMSLOW TEMP SYSTEMS

POTABLE WATER110°130°

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DISEASESDISEASES

LEGIONELLAE-COLISALMONELLAHERPESAIDS

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SIZING WITHOUT VARIABLESSIZING WITHOUT VARIABLES

units x time x flow x T x H2O x oc x inv/eff------------------------------------------------------ duration

= instantaneous btuh requirement

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DEFINITIONS OF FORMULADEFINITIONS OF FORMULA

# OF UNITS hotel rooms apts cells etc TIME in the shower VOLUME of the flow device T of the thermal lift H2O the weight of water OCCUPANCY # of people in each unit INVERSE of the efficiency of the product DIVIDED by the duration hours to deliver EQUALS the instantaneous demand

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REAL NUMBERSREAL NUMBERS

250 X 5 X 3 X 60 X 8.33 X 1.5 X 115%------------------------------------------------------ 1.5

= 2,156,000 BTUH

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EQUIPMENT SELECTIONEQUIPMENT SELECTION

ONE 2,200,000 BTU HEATERONE 250 GALLON TANK

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A BETTER SELECTIONA BETTER SELECTION

NEVER USE ONLY ONE HEATERSPLIT THE LOAD

2,256,000/2 = 2 – 1,128,000’s

75% x 2,256,000 = 1,692,000 x 2

80/20 x 2,256,000 = 1-1,800,000 + 450,k

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WHAT ABOUT STORAGREWHAT ABOUT STORAGRE

THUMB RULE

100 gal storage for every 1M input

REDUCE input 100K for every 100 gals of storage on hand 2/3 max

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HYBRID SYSTEMSHYBRID SYSTEMS

WHAT IS IT?A BOILER OR WATER HEATER

SYSTEM THAT USES CONDENSING AND NON- CONDENSING EQUIPMENT IN THE SAME APPLICATION TO OPTIMIZE SYSTEM EFFICIENCY AND CAPITAL

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HOW TO GO GREENHOW TO GO GREEN

SAVE WATERLOW NOXWISE PURCHASE OF EQUIPMENTHYBRID SYSTEMSNIGHT SET BACKSPREVENTATIVE MAINTENENCE

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SUMMARYSUMMARY

WHERE DOES HIGH EFFICIENCY COME FROM?

ENERGY TRAPPED IN FLUE GAS AS WATER VAPOR

WHEN DO YOU ACHIEVE HIGH EFFICIENCY IN YOUR DESIGN

OPERATING BELOW THE DEW POINTWEIGH THE CONDENSATEHYBRID SYSTEMS

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Where to Get More InformationWhere to Get More Information

READ THE MANUALSREAD THE GRAPHSUNDERSTAND THE PHYSICSWHAT ARE YOU TRYING TO DO?CONSULT YOUR REPRESENTATIVE

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THANK YOUTHANK YOU