Optimizing the pine wood drying process using a critical diffusion coefficient and a timed moistening impulse

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Industrial 35 mm pine wood drying schedule used in the experiment and the simulation section_

Time (h)	Air temp. (°C)	Air RH (%)
0	20	93
1	47	93
12	47	93
36	50	90
60	52	85
84	52	80
108	52	69
132	52	59
156	52	49
180	52	39
204	52	39

Optimized industrial pine wood drying schedule based on the definition of critical DC and critical RH_

Time (h)	Air temp. (°C)	Air RH (%)
0	20	60
1	47	83
113	52	81
132	52	59
156	52	49
180	52	39
204	52	39

A forced drying schedule for pine wood_ Data regarding the stages of the moistening impulse are given in parenthesis in the table_

Time (h)	Air temp. (°C)	Air RH (%)
0	20	93
1	47	93
24	47	77
48	50	61
72	52	45
(90)	(52)	(40)
96	52	29
120	52	13

Calibration functions were derived from Formula (4) for electrical resistance sensors at depths of 1 mm and 4 mm from the surface of the wood in sections AB, BC, and CD_

Depth (mm)	AB	BC	CD
1 mm	y = −30.277x+1584.9	y = −0.6058x+56.458	y = −0.3867x+42.873
4 mm	y = −32.895x+1691.4	y = −0.7255x+73.292	y = −1.1495+98.947