TW334511B - The thermal capacity measuring system - Google Patents

Abstract

A thermal capacity measuring system by using full-range heating temperature reaction, it includes hardware portion of specific heat scale system for getting original data. The original data needed by measuring thermal capacity is the temperature of recording the heating process of specific heat scale and the changing amount changed along the heating power. It is marked as (T^I, Pi, ti), in which I = 1-N, and I = 1-K is recorded before starting to heat, T^I is the temperature of specific heat scale, Pi is the heated power of specific heat scale, ti is passing time after recording. And by following data processing method to get sampling thermal capacity as features: (1) Assume (ti, T^I) in (T^I, Pi, ti), in I = 1-K as a straight line, that is T1(t) = at + b, to get a and b; (2) Calculate (T^I, Pi, ti) = (T^I - (ati +b), Pi, ti), I = 1-N, in which, define Ti = T^I-(ati + b); (3) Connect (T^I, Pi, ti) with function nearing method into T(t) and P(t); (4) By T(t) and P(t) to get base function; (5) Get a1, a2 and a3, and let h = a1, q = a2, s = a3; (6) By h, q, s to get thermal capacity of sampling: c = (s/q2) + (l/q) - c^.