heat transfer to a sunroom the affect of window type on heat transfer

16

HEAT TRANSFER TO A SUNROOM the affect of window type on heat transfer

Upload: francis-stevens

Post on 04-Jan-2016

220 views

Category:

Documents

1 download

Report

Download

Tags:

Embed Size (px):

TRANSCRIPT

Page 1: HEAT TRANSFER TO A SUNROOM the affect of window type on heat transfer

HEAT TRANSFER TO A SUNROOMthe affect of window type on heat transfer

Page 2: HEAT TRANSFER TO A SUNROOM the affect of window type on heat transfer

The Situation

Clear Day Mid June Provo, UT The Pate’s have recently added a sunroom

to the exterior of their home. In the summer the temperature rises in that room a considerable amount. Should they have installed double pane windows instead? Should they invest in windows with reflective coating? How much of a difference would these windows make?

Page 3: HEAT TRANSFER TO A SUNROOM the affect of window type on heat transfer

What We Know:

Incident Solar Radiation East Wall: 5015 W/m2

South Wall: 2997 W/m2

West Wall: 5015 W/m2

Temperature Data Tsur, interior = 20° C Tsur, exterior = 35° C

Physical Properties Glass (T=300K)

1.4 W/mK Air

K=.0263 W/mK (T=300K)

Areas of Windows: East Wall

8.09 m2

South Wall: 6.77 m2 (x 2) 2.60 m2 (x2)

West Wall 8.09 m2

Volume of the Room 60 m3

Page 4: HEAT TRANSFER TO A SUNROOM the affect of window type on heat transfer

What We Assume:

Radiation Properties of Glass Transmissivity = .95 Absorbtivity = 0 Reflectivity = .05 Emissivity = .9

Neglect radiation out of the room (only consider incident radiation)

No heat transfer through the walls

Tsur stays constant Window areas are

all square (see diagram)

Page 5: HEAT TRANSFER TO A SUNROOM the affect of window type on heat transfer

Single Pane Glass

ho,i = 6 W/m2

qconv+cond = 728 W qrad= 1606 W qtotal= 2324 Ho,

To

Hi , Ti

Page 6: HEAT TRANSFER TO A SUNROOM the affect of window type on heat transfer

Double Pane Glass

RaL=91.37 ΔT RaLmax = 1307 1307 < 1708 Convection between

planes is negligible. Transmissivity: .9 Reflectivity: .1 h = 6 W/m2

qconv+cond= 168 W qrad= 1522 W qtotal= 1690 W

Ho, To

Hi , Ti

Page 7: HEAT TRANSFER TO A SUNROOM the affect of window type on heat transfer

Double Pane Glass with Coating Reflective glass

Reflectivity: .28 Transmissivity: .72

Heat transfer from convection and conduction stays the same.

qconv+cond= 168 W qrad= 1217 W qtotal= 1385 W

Hi , Ti

Ho, To

Page 8: HEAT TRANSFER TO A SUNROOM the affect of window type on heat transfer

Air Conditioning Cost

Single Pane: $122.07 Double Pane: $148.09 Coated Double Pane: $216.12 $.08/KWhr COP = 3.4 Summer Savings: $94.05 Coating: $36/Window Estimate: $216 to upgrade, 2.5 Summers

to recover the savings

Page 9: HEAT TRANSFER TO A SUNROOM the affect of window type on heat transfer

Presented By:

Nathan Honka Dallin Shaw Jenny Pate

Page 10: HEAT TRANSFER TO A SUNROOM the affect of window type on heat transfer

Appendix A: Radiation Data

Page 11: HEAT TRANSFER TO A SUNROOM the affect of window type on heat transfer

Appendix B: Equations

Inside Convection Coefficient

Thermal Resistances

Page 12: HEAT TRANSFER TO A SUNROOM the affect of window type on heat transfer

Appendix B: Equations

qconv,i on inner surface:

qcond through window:

qconv,o = qcond = qconv,i

Could not solve that system so we assumed h=6W/m2 to determine qconv,i and qconv,o.

Page 13: HEAT TRANSFER TO A SUNROOM the affect of window type on heat transfer

Appendix C: Spreadsheet Solution

Page 14: HEAT TRANSFER TO A SUNROOM the affect of window type on heat transfer

Appendix C: Spreadsheet Solution

Page 15: HEAT TRANSFER TO A SUNROOM the affect of window type on heat transfer

Appendix C: Spreadsheet Solution

Page 16: HEAT TRANSFER TO A SUNROOM the affect of window type on heat transfer

Sources

Incident Solar Radiation Values: http://geology.utah.gov/sep/renewable_energy/solar/images/data_tables/slcbld.jpg

Heat Transfer Modeling - School of Engineeringbarbertj/CFD Training/Fluent/6 Heat Transfer... · Heat Transfer ModelingHeat Transfer Modeling ... zIncludes heat transfer between continuous

MANUAL HEAT TRANSFER LAB - Department of ME - …mech.gecgudlavalleru.ac.in/pdf/manuals/HEAT TRANSFER LAB.pdf · MANUAL HEAT TRANSFER LAB ... GUDLAVALLERU ENGINEERING COLLEGE HEAT

ANSYS FLUENT Heat transfer steady computationshome.agh.edu.pl/~jaszczur/doc/ansys/FLUENT(heat transfer... · 2017-09-18 · ANSYS FLUENT Heat transfer steady computations Heat transfer

Energy, Heat and Heat Transfer

Engine Heat Transfer - MIT OpenCourseWare...Engine Heat Transfer 1. Impact of heat transfer on engine operation 2. Heat transfer environment 3. Energy flow in an engine 4. Engine heat

THERMODYNAMICS,THERMODYNAMICS, HEAT HEAT TRANSFER,TRANSFER ... Textbooks/06... · thermodynamics,thermodynamics, heat heat transfer,transfer, ... heat transfer terminology ... holman,

Convective Heat Transfer (6) Forced Convection (8) · PDF fileConvective heat transfer Introduction of heat transfer coeficient: Convective heat transfer Objective(ofchapter6-11):

Heat Transfer and Heat Exchangers

Heat Transfer Fluid for Concentrated Solar Systems SUMMER... · Heat Transfer Fluid for Concentrated Solar Systems ... Influence of radiation on heat transfer ... Heat transfer dominated

HeaT Transfer Heat Exchangers

Energy Balance. HEAT TRANSFER PROCESSES Conductive heat transfer Convective heat transfer Radiation heat transfer

Heat and Heat Transfer

ADVANCED HEAT TRANSFER 1. MODES OF HEAT TRANSFER …sj376/ht.pdf · 1 ADVANCED HEAT TRANSFER 1. MODES OF HEAT TRANSFER Conduction Conduction is the mode of heat transfer through solids,

Chapter 4: Heat Capacity and Heat Transfer - · PDF fileChapter 4: Heat Capacity and Heat Transfer Navapadol Kittiamornkul, Ph. D. Chapter 4: Heat Capacity and Heat Transfer

Heat Heat Transfer

Heat Transfer and Heat Exchangers.ppt

Heat Transfer HEAT TRANSFER - Resosir

The Dolphin Heat Transfer The leader of the heat transfer industry · 2017. 10. 2. · Dolphin Heat Transfer The Dolphin Heat Transfer The leader of the heat transfer industry . We

Heat Transfer - NC State University · PDF file1 Heat Transfer Heat Transfer • Introduction – Practical occurrences, applications, factors affecting heat transfer – Categories

Heat Transfer - SFU.camxchen/Phys1011117/Lecture33A.pdf · Page 1 Phys101 Lectures 33, 34 Heat Transfer Key points: •Heat as Energy Transfer •Specific Heat •Heat Transfer: Conduction,

HEAT TRANSFER EQUATION SHEET - UTRGV Faculty Webfaculty.utrgv.edu/constantine.tarawneh/Heat Transfer... · HEAT TRANSFER EQUATION SHEET Heat Conduction Rate Equations ... radiation

Heat Transfer What do you know about heat transfer?

HEAT ENERGY AND ITS TRANSFER. HEAT TRANSFER BY RADIATION

Heat Transfer - SFU.camxchen/phys1011002/Lecture35A.pdf · Page 1 Phys101 Lectures 35, 36 Heat Transfer Key points: •Heat as Energy Transfer •Specific Heat •Heat Transfer: Conduction,

Heat and Heat Transfer HeatTemperatureConductionConvectionRadiation

Introduction to the Heat Transfer Module...Heat Transfer Module contains relations for the calculation of heat transfer coefficients for different types of convective heat transfer

THERMODYNAMICS,THERMODYNAMICS, HEAT HEAT TRANSFER,TRANSFER ... · THERMODYNAMICS,THERMODYNAMICS, HEAT HEAT TRANSFER,TRANSFER, AND FLUIDAND FLUID FLOW,FLOW, Module 2Module 2 HeatHeat

The theory behind heat transfer - Monoclor Theory behind heat transfer.pdf · Heat transfer theory Heat can be transferred by three ... Overall heat transfer coefficient Calculation

Heat transfer in boilers Heat Engines & Boilers. Combustion chamber calculation Radiation heat transfer Adiabatic flame temperature Heat transfer in combustion

UNIT V HEAT TRANSFER Heat Energy and Heat Transfer

HEAT TRANSFER IN GASEOUS MICROFLOWS: CONJUGATE HEAT TRANSFER, RAREFACTION … · 2016-05-25 · HEAT TRANSFER IN GASEOUS MICROFLOWS: CONJUGATE HEAT TRANSFER, ... HEAT TRANSFER IN

me263-Fluids and Heat Transfer - firefly labs2016)/n/w9/me263-Heat... · me263-Fluids and Heat Transfer Heat Exchangers – Overall Heat Transfer Coefficient

Heat. Heat As Energy Transfer Internal Energy Specific Heat Calorimetry – Solving Problems Latent Heat Heat Transfer: Conduction Heat Transfer: Convection

HEAT AND MASS TRANSFER IN TEXTILESworldses.org/books/2007/heat-and-mass-a.pdf · Convective heat transfer rate ... Conduction heat transfer in textiles 3.1. Introduction ... “heat”

Download - UK Heat Transfer Society - UK Heat Transfer Society