Table 2.
Thermal circuit for transfer mode.

Transfer mode	Amount of heat transferred
Conduction	Qcond = QΔ/Δt=k25°C × A × ΔT/L
	k25°C : hermal conductivity of atmosphere at 25°C (Table 1)
	A : total cross sectional area of conducting surface
	ΔT : temperature difference
	L : length of conducting surface
Convection	Qconv = hconv × Asurf ×ΔT
	hconv : convection heat transfer coefficient
	Asurf : surface area
	ΔT : temeprature difference
Radiation	Qradi = σ × Ɛ × Asurf (T14 — T24)
	σ : Stefan-Boltzman constant (5.669×10-8)
	Ɛ : emissivity of materials (mortal cement : 0.94, Paulownia coreana : 0.9, MDF : 0.85)
	Asurf : surface area
	T1 : temperature of sample contact surface
	T2 : temperature of space atmosphere