Table of Contents
What is the calorific value of water *?
Water has no calorific value and it also absorbs heat being vaporized during combustion. The combustion reactions of bagasse as a fuel are as given in Table 3 (Mugadhi 1999). The net calorific value of bagasse, with around 48\% moisture content is about 7670 KJ/kg (Deepchand 2000, Mugadhi 1999, Murefu 2001).
How do you calculate calorific value of water?
Procedure to Calculate Calorific Value Net Calorific Value (NCV) means lower heating value (LHV) i.e. lower calorific value (LCV) is determined by the subtraction of heat of vaporization of the water vapour from the higher heating value.
What is calorie calorific value?
A food calorie is actually a “kilocalorie.” In other words it is the amount of energy needed to raise the temperature of one liter of water by one degree. Originally, the calorie content of a food was measured in a calorimeter.
What is Calorific Value Class 8?
“Calorific value refers to the quantity of heat produced by complete combustion of a unit volume of a substance.” The amount of heat energy present in food or fuel is measured by full combustion of a specific quantity at constant pressure and under normal circumstances.
What is the calorific value of carbohydrates?
Carbohydrates provide 4 calories per gram, protein provides 4 calories per gram, and fat provides 9 calories per gram.
What is calorific value example?
Example. Calorific Value of Petrol is 45000 KJ/Kg. It means if 1 Kg of Petrol is completely combusted,it will produce 45000 Kilojoules of heat energy.
Which has maximum calorific value?
Ethanol and fats have the highest amount of calorific value per gram i.e. 29 and 37 kilojoules per gram or 6.9 and 8.8kcal/g respectively and proteins and most carbohydrates both have about 17kJ/g or 4kcal/g.
What are the two types of calorific value?
Two types of calorific values are Higher Calorific Value and Lower Calorific Value .
What is the calorific value of calorific?
Calorific value. What is the Calorific value? Calorific value is the amount of heat energy present in food or fuel and which is determined by the complete combustion of specified quantity at constant pressure and in normal conditions. It is also called calorific power. The unit of calorific value is kilojoule per kilogram i.e. KJ/Kg.
What is the calorific value of water vapour?
The unit of calorific value is kilojoule per kilogram i.e. KJ/Kg. Water vapour is generated in the combustion process and the heat should be recovered by using certain techniques. If the heat contained in the water vapour could be recovered then it has high calorific value.
What is the calorie content of water?
Water has absolutely no caloric value. All mammals get calories only from digestible and metabolizable carbohydrates, fats, and proteins (as well as ethanol, for dishonorable mention). In fact water (along with carbon dioxide) is the end product that foods are metabolized to. Water is effectively a low-energy substance totally lacking calories.
What is the difference between gross calorific value and heating value?
The heating value is expressed as gross and net calorific value, depending on the status of water present in the exhaust. If water is present as liquid, then heating value is called gross calorific value. If water is present as vapor, then the heating value is called net calorific value.