Heat Transfer and Thermal Performance in Construction Technology

CONSTRUCTION TECHNOLOGY 5
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Question 1
Mostly the human body is always trying to maintain its temperature at a constant through the
creation of equilibrium amongst the heat, which is lost to the amount of heat added. The heat in
the body is usually added through various actions such as trembling, doing exercises together
with the use of other external heat sources which includes heat packs. The main mechanisms
through which the body heat is usually lost are four (Jessen, 2017, p. 672). These include;
i) Evaporation
Vaporisation of sweat form the human skin facilitates the loss of heat from the human body.
The heat from the body can also be lost when an individual is wearing wet cloths.
ii) Radiation
The heat, which generated in the human body, can be lost to the neighbouring environment
through a vacuum.
iii) Convection
Convection refers to the method through which heat from the body is lost to the environment.
This is achieved through the liquids and fluids, which comes into contact, and carry along with
them the hotness from the body, which is lost to the surroundings. The loss of heat through
convection usually takes place when an individual is showering or when the body is exposed
to the blowing air which blows way from the body surface (Miller, 2016, p. 117).
iv) Conduction
The warmness from the body is lost through conduction through the objects, which the body
comes into contact with. The heat is lost to the objects, which have a lower temperature than the

body temperature. The heat from the body is transferred to the objects, which the body is in
direct contact until they achieve an equilibrium temperature (Floyd, 2011, p. 673). This is the
most common way through which the body is lost since the human body is in constant contact
with objects.
Question 2
The movement of heat may be in a transient or in a stable procedure. In scenarios where the
flow of heat is in a transient process, the flow of heat and the temperature changes with the
change in time while the heat flow occurs in a steady flow , the heat flow happens when both
the temperature and the heat flow get at a stable balanced state which usually with time does
not. Based on the detailed tasks, the assumptions, which are usually made regarding the steady