Heat Capacity

The capability of a substance to absorb energy in the form of heat for a given increase in temperature. Materials with high heat capacities, such as water, require greater amounts of heat to increase their temperatures than do substances with low heat capacities, such as metals.

How to determine vessel heat capacity

Here are the basic steps:

1. Heat a specific volume of water (measure accurately) in a separate vessel to a temperature in the range normally used for mashing (i.e. 140-160°F (60-70°C)
2. Pour the water into the vessel to be tested.
3. Check the temperature after 5 minutes in the test vessel.
4. Check again after 65 minutes. This measurement determines the vessels heat loss.

Note: Use volumes and temperatures closest to those that you use in your mashing process to achieve more accurate simulation.