H3-DV-12B flender limited Helical speed reducers H3

Flender/Flender Gear Units/Helical speed reducers H3

ecic heat can be calculated from heat-balance equation between the heat gained (or lost) by one material and heat lost (or gained) by the liquid, using the following expression: Cp2/H1m1Cp1(Te/H1T m2(T2/H1Te)( Great care must be taken to avoid heat exchange with the exterior. Encapsulation of the sample in copper cylinder or plastic pouches can be used to avoid moisture migration.Rahaman ( has detailed the sources of errors in the mixture method. Mohsenin ( presented method of guarded plate to measure the specic heat of agricultural materials. In this method, the specimen is surrounded by electrically heatedthermal guards. These thermal guards are maintained at the same temperature as the speci-men, which is also being heated electrically; thus, there is no heat loss. The specic heatof the sample can be calculated by heat balance as Eq. (. /H1VIt (Tf/H1Ti)( where VandIare the voltage (volt) and current (amp) supplied to the heater for the time ();TfandTiare the nal and initial temperature of the sample of mass (kg). Mohsenin also described an adiabatic chamber method to measure the specic heat of agriculturalproducts. The adiabatic chamber is designed to prevent heat or moisture loss through the chamber. measured quantity of heat is added by means of heating wire immersed in the bulk material in container placed in the test chamber. The specic heat of the materialcan be calculated from the heat balance as /H1(mC pT)sample/H1(mC pT)container/H1(mC pT)chamber ( Wright and Portereld ( used calorimeter to measure the specic heat of single peanut. The calorimeter consisted of small aluminum cup surrounded by resis- tance heating coil and foam insulation. The temperatures of peanut and calorimeter were measured using two thermocouples. constant power was supplied for specic time, andtransient temperature data were gathered during heating and cooling of the calorimeter,with and without the sample. The specic heat was calculated by the heat bal