ar-2019 lecture on environment.

1. INTRODUCTION TO ENERGY &
ENVIRONMENT
LECTURE: 26 FEB, 2020
Ar.M.Tariq
B.Arch. (UET ATD)
MS.Env Design (cont.)
AR-2019 ARCHITECTURE DEPARTMENT CECOS UNIVERSITY 1

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“You have stolen my dreams and my
childhood with your empty words,” a visibly
emotional Thunberg said.

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6. ENERGY "THE ABILITY TO DO WORK"
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7. ENERGY
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8. ENVIRONMENT
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9. Every day, people flip on light switches, turn on their computers, and
use energy in many other ways in their homes, offices, and schools.
Using all that power leads to greenhouse gas emissions, especially if
the energy is generated from fossil fuels.
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11. ACCORDING TO A RECENT STUDY FROM
THE BERKELEY NATIONAL LABORATORY,
THE WORLD IS SET TO INSTALL SOME 700
MILLION AIR CONDITIONERS BY 2030, AND
1.6 BILLION BY 2050.
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12. WHY WE NEED ENERGY
CONSCIOUS DESIGN
7.442 billion (2016)
World population projected
to reach 9.7 billion by 2050
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14. WHAT RESOURCES ARE IN
DECLINE?
Water – Even though you see water everywhere and our planet is 70%
water, only 2.5% of that 70% is fresh water.
The Food and Agriculture Organization of the United Nations predict
that by 2025, 1.8 billion people will have no water to drink.
Oil – Without oil, global transportation will be severely debilitated.
The BP Statistical Review of World Energy estimates that there is
188.8 million tons of oil left in the known oil reserves as of 2010.
If our current demand continues, this oil will only be enough to
supply the world demands for the next 46.2 years.
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15. CONT.
Natural Gas – As of 2010, the known reserves of natural gas was
estimated to last 58.6 years with the current global production.
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16. THE WORLD COUNT
http://www.theworldcounts.com/stories/Depletion-of-Natural-
Resources
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17. BUILDINGS CONSUME HALF OF ALL
ENERGY
2017 A & B ARCHITECTURE DEPARTMENT CECOS UNIVERSITY 17

18. SOLUTION
The only solution to cope these challenges and to prevent our planet
earth from depleting the energy sources is to consciously use energy
in buildings.
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19. CONT.
Climate change has become an undoubted environmental challenge
in last couple of decades in every continent and all sectors across the
world.
It occurs due to increase in temperature of atmosphere by burning of
fossil fuels and releasing of greenhouse gases.
These days, vast quantities of fossil fuels have been used for energy
source to power the economy of a country. This scenario significantly
contributes to a large percentage of carbon dioxide emissions. By
comparing with other economic sectors, it was reported in the
literature that the consumption of energy in buildings accounts for
about one third of the total consumption and responsible for an equal
portion of carbon dioxide emissions in both developed and
developing countries. 19

20. A TYPICAL HOUSE
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21. PASSIVE HOUSE
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22. ZERO ENERGY BUILDING, ENERGY
EFFICIENT DESIGN, SUSTAINABLE
ARCHITECTURE, PASSIVE HOUSE
Energy-efficient buildings are designed to use as little energy as
possible.
Those building which use as little energy as possible.
Buildings can be made energy-efficient by using quality building and
insulation materials which help prevent heat loss and make the
building airtight.
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23. SETHI HOUSE PESHAWAR
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24. STRATEGIES: PASSIVE COOLING
Passive cooling is a building design approach that focuses on heat
gain control and heat dissipation in a building in order to improve the
indoor thermal comfort with low or no energy consumption.
This approach works either by preventing heat from entering the
interior (heat gain prevention) or by removing heat from the building
(natural cooling).
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25. 1.VENTILATION
The keys to good wind ventilation design are the building orientation
and massing, as well as sizing and placing openings appropriately for
the climate.
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26. SINGLE SIDE VENTILATION
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The illustration shows a typical situation in an office with
single side-ventilation, i.e. a room with windows on only one
side.

27. CROSS VENTILATION
The illustration shows a typical situation in an office with double
side-ventilation, i.e. a room with windows on two sides.
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28. STACK VENTILATION
The illustration shows the stack effect that arises as a consequence of
temperature differences. Warm air rises because it is less dense than
cold air. When warm air rises to the roof of a building it creates a
slight vacuum in the building's lower levels, which in turn pulls fresh
air in through windows in the ground floor. This creates a natural
airflow.
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29. EXAMPLE OF STACK VENTILATION
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31. EVAPORATIVE COOLING
Evaporative cooling is based on a physical phenomenon in which
evaporation of a liquid (usually water) into surrounding air cools an
object or a liquid in contact with it.
Water is an excellent coolant because it is, non-toxic, and evaporates
easily in most climates. Six gallons (22.7 L) of water evaporating has
the same cooling effect as a typical (3.5 ton-hour) home central air-
conditioner.
Evaporative cooling is a very common form of cooling buildings
because it is relatively inexpensive and requires less energy than
many other forms of cooling. Unfortunately, evaporative cooling
requires an abundant water source, and is most effective in climates
with low humidity.
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32. LIGHT STUDY IN CECOS
2017 A & B ARCHITECTURE DEPARTMENT CECOS UNIVERSITY 32

33. SOLATUBES
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