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 | m² | 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
Images:
GBE Calculator Whole Building Development Decrement PDF
© 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
GBE Calculators Shop
- Whole Building U value to In Use Carbon A05 XLSX (Shop) G#11009
- Whole Building U value to In Use Carbon A06 XLS (Shop) G#11095
- Whole Building EE EC SC A11 XLS (Shop) G#11090
- Whole Building EE EC SC A10 XLSX (Shop) G#10445
- Timber Species Schedule (Shop) G#10656
By Others
- U-value Calculator App G#10630
- Shared Earth Building Embodied Carbon Database 12/02/13 G#1307 N#1298
GBE Jargon Buster
Initials, Abbreviations, Acronyms:
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
- Shaped Earth Embodied Carbon (Database) G#1307 N#1298
GBE Links
- AECB
- WRAP
- CarbonLite
- Innovate UK
- Passivhaus
- RetScreen
© GBE NGS ASWS Brian Murphy aka BrianSpecMan *
11th November 2019 – 12th November 2019
