GBE Calculator Decrement Equation GBE CPD Overheating

GBE Decrement Delay Factor Equation

GBE > Encyclopaedia > Files > Calculators > Equations > G#31148

GBE Decrement Delay Factor Equation
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Decrement delay FU : to give a decrement delay (d) of X hours (defined by the user) for 1 m² surface Number Units Source Choose this method not the next one
Property 2: Decrement delay (d), Approach a: Specific Heat Value = Wh/kg.K m
Needed data DL Design Life of Building 50 Years Default For Life Cycle Assessment
Needed data CLE Component Life Expectancy/Replacement period 50 Years Default or PDS For Life Cycle Assessment
Needed data Material LookUpTable Use with look up tables
Needed data 1 e thickness of material layer 0.3 m PDS For Performance
Needed data 2 ρ Rhô (volumic mass) [density] 700 kg/m3 PDS
Default data 3 S surface area of wall considered 1 Default For Life Cycle Assessment
Needed data 4 λ thermal conductivity 1 W/m.K PDS Be careful with units
Needed data (option 1) 6 c Specific heat value 0.58 Wh/kg.K PDS See Converter below if units are: J.kg/K
Defined by User 7 d Decrement delay (Hours) 12 Hours LookUpTable Could this be LUT/DDL with options?
Formulas d=1,38*e*√1/a d Decrement delay (Hours) 0.02055 Hours
Formulas a=λ/p*C a diffusivity
Formulas e=d/1.38*√(p*C/λ) e thickness of material layer
Formulas Q=e*S*ρ Q Quantity
Calculation Q=(d/1.38*√(p*C/λ))*S*p*(DL/CLE) Q Quantity 302 kg Calculated For Life Cycle Assessment; Checked
Converter
Input from: Product Data Sheets Result
Specific Heat Value
from J/kg.K to Wh/kg.K
2100 J/kg.K = 0.583333333 Wh/kg.K

© GBE NGS ASWS Brian Murphy aka BrianSpecMan *
11th November 2019 – 12th November 2019

GBE Decrement Delay Factor Equation
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GBE Calculator Decrement Equation GBE CPD Overheating


© GBE NGS ASWS Brian Murphy aka BrianSpecMan *
11th November 2019 – 12th November 2019

GBE Decrement Delay Factor Equation
See Also:


GBE Equations

  • Decrement Delay Factor (Equation) G#31148 (This page)

GBE Datasets

  • Timber Species Schedule (Dataset) G#1371 N#1351
  • Generic Materials Schedule (Dataset)
  • Regulations/Design Guides Elemental U values/Airtightness (Dataset)
  • Thermal Insulation Materials properties (Dataset)

GBE Calculators

  • Whole Building Energy Demand
  • Elemental % Comparison (Calculator)
  • Fuel and In Use Carbon (Calculator)
  • Regulations/Design Guides Elemental U values/Airtightness (Dataset)
  • Form factor & U value (Calculator)
  • Insulation v Glazing cost comparison (Calculator)
  • Thermal Insulation Materials (Dataset)
  • Insulation material > U value > Thickness (Calculator)
  • Insulation material > Decrement Delay > Thickness (Calculator)
  • Interstitial Condensation Check (Calculator)
  • Whole Building U value, IUC, EE, EC, SC, LCA (Calculator)
  • Whole Building EE EC SC (Calculator) G#1910 N#1764
  • Whole Building U value (Calculator)
  • WasteCost®lite (Calculator) G#531 N#551
  • Loft Insulation U value Raised deck support Psi value (Calculator) G#14582
  • StoreFloor Thermal Bridge (Calculator) G#13287
  • Scale Changer (Calculator) G#19287

GBE Calculators Other’s

  • Carbon Calculator
  • Decrement Calculators
  • Embodied Carbon Database Launched 10/04/2014
  • Psi value (Calculator Database)
  • Thermal Mass (Calculator) G#16163
  • U Value Calculators
  • U-value only Calculator App G#10630

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By Others


GBE Jargon Buster

Initials, Abbreviations, Acronyms:

  • AECB G#1007 N#1027
  • C
  • CO2
  • CO2e
  • D&DT
  • EC
  • EE
  • ICE G#1018 N#1037
  • PHPP
  • SAP
  • SBEM
  • SC
  • TSB
  • WCL G#1297 N#1289
 Words or phrases:
  • Association for Environment Conscious Building (Jargon Buster) G#1007 N#1027
  • Building Embodied Carbon
  • Building Embodied Energy
  • Building Energy Demand
  • Building Fuel demand and Carbon generated
  • Building U Value
  • CAPEM Compass
  • Carbon lite
  • Design & Decision Tools
  • Decrement Delay (Jargon Buster) G#14043
  • Decrement Delay Decrement Factor (Jargon Buster) G#14043
  • Decrement Factor(Jargon Buster) G#14043
  • Element area U Value
  • Elemental section U Value
  • Embodied Carbon (EC)
  • Embodied Energy (EE)
  • Embodied Water
  • Equation
  • Fuel Carbon
  • ICE Database (Jargon Buster) G#1018 N#1037
  • Innovate UK
  • Passivhaus
  • RetScreen
  • Sequestered Carbon (SC)
  • Technology Strategy Board (TSB)
  • U value
  • WasteCost®lite (WCL) (Jargon Buster) G#1297 N#1289
  • Water Calculator (by AECB)

GBE Database


GBE Links

  • AECB
  • WRAP
  • CarbonLite
  • Innovate UK
  • Passivhaus
  • RetScreen

© GBE NGS ASWS Brian Murphy aka BrianSpecMan *
11th November 2019 – 12th November 2019

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