Gross and Net Calorific Value

NCV is the net heat produced when a unit quantity of fuel is completely burnt and the products of combustion are allowed to escape, while GCV is the total amount of heat generated when a unit quantity of fuel is completely burnt in oxygen and the products of combustion are cooled down to room temperature.

NCV is lower than GCV since the water vapor formed due to the presence of hydrogen in fuel is not condensed and escapes along with hot combustion gases.

GCV is higher than NCV because GCV accounts for the latent heat released when the water vapor formed during combustion is condensed to water as the products of combustion cool down to room temperature.

<p>In GCV, the water vapor formed during combustion gets condensed to water and releases latent heat as the products of combustion cool down to room temperature.</p> Signup and view all the answers

<p>GCV is called Higher Calorific Value (HCV) because it represents the total heat generated when a unit quantity of fuel is burnt completely in oxygen and the products of combustion are cooled to room temperature.</p> Signup and view all the answers

<p>GCV is measured experimentally by burning a unit quantity of fuel completely in oxygen and then cooling the products of combustion down to room temperature.</p> Signup and view all the answers