Welcome toHuman outside comfort

Victoria University CollageEngineering Foundation Section(D)

GROUP (4)1) Aung Thu Phyo

2) Sis Naing Myo

3) Mya Eain Si

4) Su Moon Oo

5) Myat Yoon Lwin

The EnvironmentThere are two kinds of environments. They are-

(1) the built environment and

(2) the natural environment.

The built Environment consist of all other things that have been constructed or tall building by human beings.

Natural Environment including of River, Forest ,Plants, Animals, and Ecosystem etc………..

Human outside ComfortThere are six factors that influence how a person will feel when going outside. They are Sunlight Temperature Clothing Wind Evaporative cooling Humidity

SUN LIGHTSunlight is a radiation

rays but little advantage considering mental health. Then Animals and plants all specific living to their environment need to sun too….

There are many disadvantages . Sunlight's are skin cancer and Eye Damage , etc….

Sunlight creates vitamin D in the form of cholecalciferol when it hits our skin. Cholecalciferol can also be taken up from the diet. Once in the body the cholecalciferol called vitamin D3 is converted by the liver into calcidiol, the form that is measured in tests for blood levels of vitamin D.

Sun DamageThe suns rays = radiation.

Radiation = skin damage.

Radiation + skin damage = Skin Cancer.

Think about it.

Sometimes sun light is very dangerous condition for People.

Sun Cancer occurs when you over expose your skin to harsh sunlight. The ultraviolet rays emitted by the sun damage your skin’s elastin , results in sunburn , age spots or brown spots are some of the other indications of Sun Cancer. You can treat this condition by using skin care products or through various other cosmetic procedures.

Temperature

Temperature is a measure of the degree of heat intensity.Temperature is a physical property of a system that

underlines the common of hot and cold but temperature is hotter generally has the greater temperature.

Temperature

There are main two type’s of temperature in the world. They are

Air temperatureEvaporative temperature

Skin TemperatureSkin temperature depends on air temperature and time spent in that environment. Such weather factors as wind chill and humidity cause changes in skin temperature. The normal temperature of skin is about 33 °C or 91 °F.

ClothingAnother determinant of thermal comfort is clothing.

Dark clothes hold the heat, so instead choose whites, that reflect it slightly active and wear typical indoor clothing.

Clothing, through its insulation properties, is an important modifier of body heat loss and comfort.

Clothing

Wind

oWind is the flow of all gases on a large scale .

oWind is an important source for renewable energy .

oWind could produce energy for the whole in the world.

Wind

Basic information on wind energy and wind technology, resources, use a lot of electricity.So include air turbine is a very useful to our environments.

Air Movement

Air motion significantly affects body heat transfer by conduction and evaporation.

Air movement results from free (natural) and forced convection as well as from the occupants’ bodily movements.

The faster the motion, the greater the rate of heat flow by both convection and evaporation.

EvaporationThe body can either gain or

lose heat by radiation and conductive-convective heat transfer, depending on the temperature of the surrounding objects and ambient air. By contrast, evaporation is exclusively a cooling mechanism.

When the surrounding environment is about 70°F (21°C), most people lose sensible heat at a rate that makes them feel comfortable.

Evaporation

HUMIDITYAmount of water vapour is include in the air. One of the most variable characteristics of the atmosphere, humidity is an important factor in climate and weather .

Saturate

Humidity varies because the water-holding capacity of air. When a volume of air at a given temperature holds the maximum amount of water vapour possible,the air is said to be saturated.

If the air is

too dry

As relative humidity drops 70% to 30%, our personal comfort is jeopardized as our life dries out.

Humidity is measured in two ways

(1) Absolute humidity  is the percentage of water vapor actually present in the air. (2) Relative humidity  is the absolute humidity divided by the amount of water. Relative humidity indicates the degree of comfort or discomfort one feels from the humidity, because it indicates the amount of perspiration that can evaporate from the skin.

Thank You for Your attention.