The image above represents %heat loss from openings in furnace.

To compute for %heat loss from openings in furnace, five essential parameters are needed and these parameters are **Black Body Radiation (B _{R}), Emissivity (E), Radiation Factor (R_{F}), Quantity of Oil (Q)** and

**Gross Calorific Value of Oil (GCV**

_{oil}).The formula for calculating %heat loss from openings in furnace:

%Q_{L} = 100(^{BR x E x RF}/_{Q x GCVoil})

Where:

%Q_{L} = %Heat Loss from Openings in Furnace

B_{R} = Black Body Radiation

E = Emissivity

R_{F} = Radiation Factor

Q = Quantity of Oil

GCV_{oil} = Gross Calorific Value of Oil

Let’s solve an example;

Find the %heat loss from openings in furnace when the black body radiation is 15, the emissivity is 6, the radiation factor is 3, the quantity of oil is 24 and the gross calorific value of oil is 9.

This implies that;

B_{R} = Black Body Radiation = 15

E = Emissivity = 6

R_{F} = Radiation Factor = 3

Q = Quantity of Oil = 24

GCV_{oil} = Gross Calorific Value of Oil = 9

%Q_{L} = 100(^{BR x E x RF}/_{Q x GCVoil})

%Q_{L} = 100(^{15 x 6 x 3}/_{24 x 9})

%Q_{L} = 100(^{270}/_{216})

%Q_{L} = 100(1.25)

%Q_{L} = 125

Therefore, the **%heat loss from openings in furnace **is **125%.**

Nickzom Calculator – **The Calculator Encyclopedia** is capable of calculating the %heat loss from openings in furnace.

To get the answer and workings of the %heat loss from openings in furnace using the **Nickzom Calculator – The Calculator Encyclopedia. **First, you need to obtain the app.

You can get this app via any of these means:

**Web** – https://www.nickzom.org/calculator-plus

To get access to the **professional **version via web, you need to **register** and **subscribe **for** NGN 2,000 **per** annum** to have utter access to all functionalities.

You can also try the **demo **version via https://www.nickzom.org/calculator

**Android (Paid)** – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator

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**Apple (Paid)** – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8

Once, you have obtained the calculator encyclopedia app, proceed to the **Calculator Map, **then click on **Materials and Metallurgical **under **Engineering****.**

Now, Click on **Fuel and Furnaces **under **Materials and Metallurgical**

Now, Click on **%Heat Loss from Openings in Furnace **under **Fuel and Furnaces**

The screenshot below displays the page or activity to enter your values, to get the answer for the %heat loss from openings in furnace according to the respective parameter which is the **Black Body Radiation (B _{R}), Emissivity (E), Radiation Factor (R_{F}), Quantity of Oil (Q)** and

**Gross Calorific Value of Oil (GCV**

_{oil}).Now, enter the values appropriately and accordingly for the parameters as required by the **Black Body Radiation (B _{R})** is

**15**,

**Emissivity (E)**is

**6**,

**Radiation Factor (R**is

_{F})**3**,

**Quantity of Oil (Q)**is

**24**and

**Gross Calorific Value of Oil (GCV**is

_{oil})**9**.

Finally, Click on Calculate

As you can see from the screenshot above, **Nickzom Calculator**– The Calculator Encyclopedia solves for the %heat loss from openings in furnace and presents the formula, workings and steps too.