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ENGINEERING CALCULATORS

Heating energy & time calculator

Engineering calculators (Beta)

Find sensible heat and heating time with constant heater power.

Inputs

Choose units and enter numbers. Full-width digits and fractions such as 1/8 or 1 3/8 are accepted. Changing a unit converts the entered value.

Results

Reference calculation only. Results do not certify suitability for an actual design or its safety.

Diagram

Inputs: select a blue symbol to edit Results: red-orange values and lines

Formula and applicability

Q = m c ΔT, Ein = Q / η, t = Q / (η P)

Displayed values are rounded. Diagrams illustrate the calculation conditions. Initial material and fluid properties are examples; replace them with values for the actual material, temperature and conditions.

Reference
Using this information as a reference

Equations assume particular loads, supports and deformation ranges. Check inputs, units and the applicability of each equation. Diagrams explain conditions; they are not manufacturing drawings or proof of safety.

Material values are typical values or reference ranges, not certified product properties or ready-to-use design allowables. They vary with standards, product form, dimensions, temper and temperature. Check the specifications and inspection certificates for the actual product.

Displayed safety factors and checks apply only to the supplied inputs and calculation model. They do not automatically establish the safety of a complete design, including code compliance, service life, fatigue or joints. For actual design, manufacture and use, separately verify applicable regulations and standards, product specifications, and the necessary tests and engineering review.

この計算で求められること

必要な熱量と、一定出力のヒーターでの昇温時間を求めます。

入力・結果・適用条件を確認する

選択した形状・計算方法により、使う項目は変わります。実際の計算は上の図と入力欄で行えます。

主な入力

  • 質量 m (kg / g / mg)
  • 比熱 c(入力例) (J/(kg·K) / kJ/(kg·K) / J/(g·℃))
  • 温度上昇 ΔT (K / °C difference / °F difference)
  • ヒーター電力 P (W / kW / mW)
  • 熱に使われる割合 η (% / fraction / ‰)

得られる結果

  • 対象物に必要な熱量 Q (kJ)
  • 必要な投入エネルギー (kJ)
  • 昇温時間の目安 (s)

計算式の概要

Q = m c ΔT, Ein = Q / η, t = Q / (η P)

比熱と出力が一定の顕熱計算です。相変化・容器の熱容量・時間で変わる熱損失は含みません。ηは0より大きく100%以下です。

現在選択中の方法には、操作欄の「計算式・適用条件」を使ってください。参考計算であり、設計全体の安全性を保証するものではありません。

関連する計算

What this calculator does

Find sensible heat and heating time with constant heater power.

Inputs, outputs and applicability

The selected model determines which of these inputs and outputs apply. Use the working diagram and input panel above to calculate.

Inputs

  • Mass m (kg / g / mg)
  • Specific heat c (example) (J/(kg·K) / kJ/(kg·K) / J/(g·℃))
  • Temperature rise ΔT (K / °C difference / °F difference)
  • Heater input power P (W / kW / mW)
  • Useful heating efficiency η (% / fraction / ‰)

Calculated results

  • Heat required by the object (kJ)
  • Required input energy (kJ)
  • Estimated heating time (s)

Formula overview

Q = m c ΔT, Ein = Q / η, t = Q / (η P)

Constant specific heat and power; sensible heat only. Phase changes, vessel heat capacity and time-dependent losses are excluded. Efficiency must be greater than 0 and at most 100%.

The displayed formula and conditions in the working panel apply to the currently selected model. Reference calculation only; it does not certify a complete design.

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