How to calculate the heat up time in a Grant water bath?
The heat up time for any Grant water bath can be determined from the volume of liquid, the heater power, the temperature difference and the heat capacity of the circulation systems. A simple formula is used to calculate the heating time in the system. t = V x Δ T x K 60 x W where: t = Heating time (minutes) V = Total liquid volume (litres L) ΔT = Temperature difference (ºC) K = Liquid heat capacity (J/L/ºC) For water: K = 4200 For silicone oil: K = 1680 W = Heating power (Watt) Example: A 12 litre bath containing water with a thermostat of 1400 W heating capacity can raise the temperature from +20ºC to +56ºC in 21.6 mins. t = 12 x (56 -20) x 4200 = 21.6 mins 60 x 1400 Top How to calculate the cool down time in a Grant low temperature circulator? The cool down time can be calculated by using the same formula as above. t = V x ΔT x K 60 x W However, as the temperature decreases the cooling power of the circulator reduces, it is therefore necessary to estimate the average cooling power ac
