Energy Balance and Phase Change Calculator

Quickly calculate the amount of energy transferred for heating/cooling fluids or phase change (melting, evaporation).

Select the Type of Calculation You Want to Perform

Isı Transferi Hesapla ($Q = m \cdot c_p \cdot \Delta T$)

Calculates the amount of heat transferred for a temperature change in a fluid. A positive result indicates heat gain, a negative result indicates heat loss.

$ Q = m \cdot c_p \cdot \Delta T $

$ \mathbf{Q} $: Transfer edilen ısı (kJ, J, kcal, Btu)
$ \mathbf{m} $: Akışkanın kütlesi
$ \mathbf{c_p} $: Özgül ısı kapasitesi
$ \mathbf{\Delta T} $: Sıcaklık değişimi ($ T_{son} - T_{ilk} $)

Sıcaklık Değişimini Hesapla ($\Delta T$)

Calculates how much the temperature of a mass will change with a given heat transfer.

$ \Delta T = \frac{Q}{m \cdot c_p} $

Pozitif $\Delta T$ ısınmayı, negatif $\Delta T$ soğumayı gösterir.

Gerekli Kütleyi Hesapla ($m$)

It calculates how much substance you need for a given heat transfer and temperature change.

$ m = \frac{Q}{c_p \cdot \Delta T} $

This calculation is often used when determining fluid flow rates in heat exchangers.

Faz Değişimi Enerjisi Hesapla ($Q = m \cdot L$)

It calculates the amount of energy required for a substance to change phase (melting, evaporation, etc.) without changing its temperature.

$ Q = m \cdot L $

$ \mathbf{Q} $: Transfer edilen ısı (kJ, J, kcal, Btu)
$ \mathbf{m} $: Maddenin kütlesi
$ \mathbf{L} $: Gizli ısı (Erime veya Buharlaşma ısısı)

What is Energy Balance?

**Energy balance** is based on the first law of thermodynamics and states that the total energy in a system is conserved. That is, the total energy entering a system must be equal to the total energy leaving the system plus the energy change stored in the system. It is a fundamental tool in chemical engineering for understanding and designing energy transfers in processes such as heating, cooling, reactions, or phase changes.

Simple energy balance equation:

Energy In - Energy Out + Energy Produced = Accumulated Energy

In steady-state systems (systems that do not change with time), the accumulation and production terms are usually assumed to be zero. In this case, the equation simplifies to:

Energy In = Energy Out

Heat Transfer and Phase Change Calculations

This calculator applies common formulas used to find the amount of heat transferred as a result of a temperature change or phase change in a fluid:

Duyulur Isı Transferi ($Q = m \cdot c_p \cdot \Delta T$): It is the heat associated with the change of temperature of the substance without changing its phase.
- $ \mathbf{m} $: Akışkanın kütlesi (kg, g, lb)
- $ \mathbf{c_p} $: Özgül ısı kapasitesi (kJ/(kg·°C), J/(g·°C) vb.)
- $ \mathbf{\Delta T} $: Sıcaklık değişimi ($ T_{son} - T_{ilk} $), pozitif (ısınma) veya negatif (soğuma) olabilir.
Gizli Isı Transferi ($Q = m \cdot L$): It is the heat required for the phase change (melting, evaporation, condensation, freezing) of the substance without changing its temperature.
- $ \mathbf{m} $: Maddenin kütlesi (kg, g, lb)
- $ \mathbf{L} $: Gizli ısı (erime ısısı, buharlaşma ısısı). Örneğin su için erime ısısı yaklaşık 333.5 kJ/kg, buharlaşma ısısı yaklaşık 2260 kJ/kg'dır.

Important Unit Conversions and Information

**Heat (Q):** Joule (J), kilojoule (kJ), calorie (cal), kilocalorie (kcal), British Thermal Unit (Btu).
**1 kcal = 4.184 kJ**
**1 Btu = 1.055 kJ**
**Temperature Change:** Temperature differences in Kelvin (K) and Celsius (°C) are numerically the same. They are different for Fahrenheit (°F) (1 °F = 5/9 °C/K).

Application Areas:

The energy required to heat or cool process fluids.
Efficiency analysis of heat recovery systems.
Design of steam boilers, condensers and heat exchangers.
Energy requirements for processes such as freezing, drying and cooking in the food processing industry.
Thermal management and temperature control in chemical reactors.

This calculator is designed to apply the fundamental principles of thermodynamics and heat transfer. Actual engineering applications may include more complex factors such as temperature changes during phase changes, chemical reactions, pressure changes, work transfer, heat losses, and different modes of heat transfer (conduction, convection, radiation). Engineering expertise with extensive thermodynamics and heat transfer software is required for detailed analysis and design.