Solar building presentation

1. AURORA’S TECHNOLOGICAL
AND RESEARCH INSTITUTE
SOLAR BUILDINGS
BY GUIDE
MUNIKUNTLA MADHAVANATH GOUD MR. A. KARTHIK

2. CONTENT
• Solar building design has been used since ancient
times. In the more recent past , it has been more or
less ignored as impractical, complicated, or too
expensive. Incorporating the sun’s energy into the
design of the built environment, however, is practical,
simple, and affordable.

3. INTRODUCTION
Following are four projects designed by the author that
illustrate passive solar design strategies, introduce a new
building-integrated photovoltaic roofing material, and show
how integrating energy systems lowers overall cost, example
include:
• An award-winning passive solar home on the northern
california coast that offers all the prevailing wind for cooling
• A five-storey solar-heated towers nestled in the redwoods
with a roof-top, solar-heated hot tub.
• A barn roof with an integrated three kilowatt
photovoltaic(PV) array that satisfies the energy
needs of a single family and loft apartment on a
five-acre ridge-top homestead

4. •New construction offers the greatest
opportunity for incorporating passive solar
design, Passive solar system make use of
natural energy flows as the primary means of
harvesting solar energy, Passive solar system
can provide space heating, cooling load
avoidance, natural ventilation and day lighting.

5. • Passive solar design refers to the use of the sun's
energy for the heating and cooling of living spaces. In
this approach, the building itself or some element of it
takes advantage of natural energy characteristics in
materials and air created by exposure to the sun.
Passive systems are simple, have few moving parts,
and require minimal maintenance and require no
mechanical systems
• Sun light can provide ample heat, light, and shade and
induce summertime ventilation into the well designed
home. Passive solar design can reduce heating and

6. CASPAR POINT HOUSE
The 3,000-square-foot caspar point home is located in
northern california on a rugged point of land jutting out
into the pacific. It incorporates southern exposues,
sunspaces, thermal mass, insulating envelope, earth
coupling, and the rmosiphon solar-heated water for
domestic hot water and radiant floors, the solar heating
stratergies have maintained comfortable indoor
temperature in an extremely harsh climate without the use
of fuel since the home was completed in 1991

7. CASPAR POINT HOUSE
• The indoor temperature has been maintained
above 65 degree Fahrenheit in this relatively
cool location. Opening windows and ventilation
tunnels protect the house from overheating. The
electricity needs are about 1/10th that of a
conventional home. This is accomplished by
using energy efficient appliances and fixture
along with solar strategies. The $93 per square-
foot construction cost was $30 less per square

8. THERMAL MASS AND INSULATING
ENVELOPE
• Thermal mass within a building regulates interior temperature.
The mass absorbs heat on sunny days and prevents overheating.
At night, the stored heat is radiated into the building. The thermal
mass at caspar point consists of 100 yards of structural concrete.
The insulating envelope extends to below grate on exterior walls
to integrate the foundation’s structural function with its ability to
store heat. At caspar the slab is insulated from the earth with R-
11 insulation, the exterior walls are wrapped walls with R-11
insulation, andR-30 was used in the ceiling to create an
insulating envelope

9. ORIENTATION
• incorporating passive design rely on the sun, wind,
and the earth to maintain comfortable indoor
temperature. Proper orientation account for more than
80% of the success of passive solar design. The
prevelling wind should be used for cooling and
ventilation. Earth berms can protect the house from
cold winds.

10. •The caspar point house is built into the earth on
the north and west side to protect it from preveling
wind. The berms also increase the depth of the
house’s connections with the earth to take
advantage of the more constant below grade
temperature. Two stories of glazing open the house
to the south for solar gain and a view of the ocean.
The exposed greenhouse act as a heater when
tomatoes thrive through the year

11. SOLAR DESIGN SYSTEM
• A complete photovoltaic system may consist of many
solar panels, a power system for accommodating
different electrical loads, an external circuit, and
storage batteries. Photovoltaic systems are broadly
classifiable as either stand-alone or grid-connected
systems.

12. PASSIVE SOLAR BUILDING
DESIGN CONCEPTS
•Passive solar buildings uses solar energy for its energy needs
in different seasons. The Concept of passive solar buildings,
performance and benefits are discussed. The rate of increasing
population growth with increasing innovations in the field of
industries and technologies have all together resulted in the
increasing energy consumption enormously.

13. • This high consumption is a concern for sustainability. This
has a negative impact on the environment and energy
conservation. So, an innovation in building construction,
that would perform with the existing energy, without
exploiting any additional mechanical or electrical sources is
called as passive solar building design concept. These
buildings take the advantage of the climate, where it must
be constructed

14. DIRECT GAIN
• Direct Gain is the most basic form of solar gain.
Solar energy enters through south-facing glazing
and is absorbed by thermal mass incorporated into
the floor and walls.
• Heat is stored in the thermal mass during the day
and later released during the night into the living
space.

15. ACTIVE SOLAR BUILDING
CONCEPT
• Active solar architecture involves the moving of heat or
coolness between a temporary heat storage medium and a
building Active solar architecture, typically in response to a
thermostat's call for heat or coolness within the building.
• These systems use external sources of energy to power
blowers, pumps and other types of equipment to capture,
store, and convert solar energy. After solar energy is
captured, it is stored for later used.

16. • Dependent on the intricacy of the design, these
systems can heat/cool a home or even provide
power to an entire building/neighbourhood.
Typically, small systems are used to supply
electricity for heating/cooling systems in homes
and other buildings, and hi-tech large systems can
supply power for entire communities

17. ADVANTAGES OF SOLAR
DESIGN IN BUILDING DESIGN
• Solar energy can substantially enhance building design.
It offers several advantages compared to conventional
energy: free after recovering upfront capital costs;
payback time can be relatively short; available
everywhere and inexhaustible; clean, reducing demand
for fossil fuels and hydroelectricity, and their
environmental drawbacks; can be building-integrated,
which can reduce energy distribution needs.

18. CHARACTERISTICS OF BUILDING
DESIGN ISSUE
• Use received solar gains for instantaneous heating load and
stores
• The remainder in embodied thermal mass or specially built
storage devices.
• Reduce heat losses using insulation and windows with high
solar heat gain factors.
• Employ shading control devices or strategically planted
deciduous
• Trees to exclude summer solar gains that create additional
cooling load.

19. MAINTENANCE OF SOLAR
BUILDING
• The timely and regular cleaning of solar cells
and PV panels.
• Regular maintenance of all thermal-based
components.
• Servicing of HT side equipment on an annual
basis.
• Diagnosis and tests pertaining to low solar
power production.

20. COST OF SOLAR BUILDINGS
• The cost of grid-connected PV systems ranges
from Rs 50,000 to 75,000 per kWp
• And the cost varies according to the inverter
and type of panel chosen.
• The cost of off grid solar PV system is
approximately Rs 1,00,000 as these PV system
require batteries which are costly.