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environment from its temperature, etc.) according to the variant given by teacher.
They may use references [1, 2] and theoretical data from basic theory.
Task 5.1
Determine the environment heat production Q and construct a graph of
e
dependence of value of the environment heat production from its temperature for
the next conditions:
- biology heat production Q (use initial data in Table 5.1), J/s;
b
- environment heat product Q =85 J/s;
e
2 о
- convection heat transfer coefficient α =4,06 W/m · С;
c
2
- effective surface of the human body F =1,8 m ;
е
о
- temperature of the human body's surface t surf. =31 С;
о
- the ambient temperature t amb (use initial data in Table 5.1), С;
- thermal conductivity of the fabrics of clothing of person
α =0,03 W/(m∙°С);
0
- fabrics' thickness of the human clothing ∆ (use initial data in Table 5.1),
0
m;
2
4
- reduced (special) radiation (emissivity) coefficient С =4,9 W/m ·K ;
0
- coefficient of exposure (irradiation) γ =0,5;
1-2
- amount of moisture that is released and evaporates G (use initial data in

Table 5.1), kg/s;
- latent heat from the evaporation of moisture that is released
4
r=226×10 J/kg;
3
- “pulmonary ventilation” V (use initial data in Table 5.1), m /s;
p.v.
3
- density of inhaled air ρ (use initial data in Table 5.1), kg/m ;
- reduced heat (thermal) capacity of inhaled air С=1005,6 J/kg·˚С

Table 5.1 – Data for solving Task 5.1
Initial Variant
data
0 1 2 3 4 5 6 7 8 9 10

Q J/s 85 90 95 100 105 110 115 120 125 130 500
b.,

t amb.1., °С 0 1 2 3 4 5 4 3 2 1 0

t amb.2., °С 4 6 7 8 9 10 8 7 6 5 5

t amb.3., °С 8 11 12 13 14 15 12 11 10 9 10

t amb.4., °С 12 16 17 18 19 20 16 15 14 13 15

t amb.5., °С 16 21 22 23 24 25 20 19 18 17 20

t amb.6., °С 20 26 26 28 27 28 24 23 22 21 25

t amb.7., °С 25 30 29 30 30 30 28 27 26 25 30

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