Power Calculation

Heating occurs with change of state:

 

 

Power Formula 4-100

  • Q1 = m. Cpi. Δθ1
  • Q2 = m. Lf
  • Q3 = m. Cpf. Δθ2
  • Legend :

    • P: Power in KW
    • Q1 = Heat quantity to heat the product to the melting temperature
    • Q2 = Heat quantity to change state
    • Q3 = Heat quantityto heat the product to its final temperature
    • Cpi: Specific heat on average heat (KJ / Kg ° C)
    • Cpf: Specific heat at final temperature (KJ / Kg ° C)
    • Δθ1: Temperature change of state - initial temperature (° C)
    • Δθ2: Final temperature - temperature change of state (° C)
    • Lf: Latent merger heat
    • t: Time of temperature rise (s)

    Heating without change of state:

    Power-Form 1-150

     

    Power Formula 2-150

     

    Power Formula 3-150

    Legend :

    • P: Power (KW)
    • m: Mass heated (kg)
    • PC (1): Specific heat (KJ / kg. ° C)
    • Cp (2): Specific heat (kcal / kg. ° C)
    • Δθ: Initial temperature - initial temperature (° C)
    • Q: Heat quantity
    • t: Time of temperature rise
    • 1.2: Safety factor

    Heating fluid (liquid or gas) in circulation:

     

    Power Formula 5-100

    Power Formula 6-100

    Legend :

    • P: Power in KW
    • D: Flow (m3 / h) ρ
    • ρ: Density (kg / m3)
    • PC (1): Specific heat (KJ / kg. ° C)
    • Cp (2): Specific heat (kcal / kg. ° C)
    • Δθ: Temperature outlet - inlet temperature (° C)

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