Energy Saving for your Dream Home by 75%-100%

Key words: Energy Saving, Dream Home, ZeroCarbon, Insulation, Insulate the roof, Smart Landscaping, Energy saving Lights, Energy Saving Air conditioning ,BAS Controls, Photo Voltaic Panels, Air conditioning Units, Microwave, Refrigerator, Oven, Home Entertainment, Water Heater

If you are living in a double story terrace house your average bill should be RM170-200 per month
If you are living in a Bungalow your bill should be RM450-500 per month
The kitchen consumes 45% of the energy in the house

Net Zero Energy House

1.) Orientation
If your orientation is along the East West Direction you should easily save electric bill by 15%

solar path, NZEB design

Energy efficient design

  • Insulation

-If your Building is insulated well you will save your electric bill by 15%
-How do you insulate your building, you need to protect the setting sun from heating the building. The sun heats up your walls,
roofs and the heat is transferred to the inside and the home is warm.

-Insulation of Roof

Roof insulation ,Zero Energy Homes

Fiber glass insulation of roof at ceiling,Zero Energy Homes

Fiber glass insulation,Zero Energy Homes

Insulate the walls with fibre-galss insulation,Zero Energy Homes

2b) Insulate the walls

-ensure the walls are designed for Thermal Zones and walls of the setting sun does not affect the walls.
Heat will be transferred to the floors

2d) Insulate with Smart Landscaping

– use green walls to shade the walls as they will keep temperatures down by
5 degrees. Smart landscaping will keep temperatures down

smart landscaping saves energy,Zero Energy Homes

duplex BRICK House,Zero Energy Homes

zero enegy homes, graph-showing-temperature-range-for-summer

 

2e.) Aprons shall be landscaped to avoid Thermal Bridging

Heat Loss by Thermal Bridging,Zero Energy Homes

Minimize the heat transfer form the outside,Zero Energy Homes

  • Use Energy saving Lights

    -Using high performance LED lights , you save electric bill by 15%

LED lights are energy saving,Zero Energy Homes

LED lights are energy saving,Zero Energy Homes

  • Use Energy Saving Air conditioning and Fridges

    -Using Energy saving Equipment, you save electric bill by 20%. will be discussed below:

  • Use BAS Controls

    -Using BAS controls systems with motion sensor etc you will save your electric bill by 15%

,Zero Energy Homes

BAS, Building Automation system

  • Use Solar Hot water system

    -Using Solar Hot water system, you will save by 5% of your electric bills

Renewable energy for water heating,Zero Energy Homes

Hot water systems from using clean energy save the global warming,Zero Energy Homes

  • Use Photo Voltaic Panels

    -Using PV Panels,you will bring the electric bill to Zero

Photo Voltaic Solar Panel,Zero Energy Homes

Photo Voltaic Solar Panel,Zero Energy Homes

Energy Saving EQUIPMENT S for Zero Energy Homes

Some guide lines for your equipment’s used at home to save energy and energy efficient homes.
These are some ways you can reduce higher energy consumption
a) Faulty appliances will
-Refrigerator with faulty thermostat
-broken and defective caskets
– shortage of refrigerant
b) Longer duration of usage of appliances will cause higher energy consumption
c) Old appliances will cause power will cause higher energy consumption
d) small units with an over load will cause will cause higher energy consumption

The energy consumption can be reduced by tweaking the House Hold equipment  by:

  • Refrigerator

    -it should not be located in a warm place eg near the sun or cooker stove
    -there should be adequate space behind the and around the equipment.
    -Check the freeze temperature should be at -18deg C
    -The temperature of the freezer should be at 5deg C
    -Frost build up shall not exceed 6mm(1/4 inch) thickness
    -Food arrangement in a way to have adequate space between the food
    -When you are going on a holiday clean the refrigerator
    -Avoid open the fridge frequently
    _Plenty of space between and the sides for energy savings

  • Microwave

-ensure the gasket for wear and tear, replace it if defective
-defective hinges
-Microwaves saves about 10-25% of heat compared to electric oven for heating and reheating
-it save 75% energy for cooking compared to electric ovens

  • Air conditioning Units

-AC units are installed away from the direct sun
-the size shall be the correct size
-the temperature setting for the air conditioning is to be 24-25 deg C for comfort
– the air filter is cleansed
-the outside coil is cleansed at least twice a year
-the blower unit is cleansed once a year
-heck the refrigerant once a year.

  • Oven

-Preheating is a waste of energy and 10 minutes before the cooking time, switch off the oven saves about 25% energy
-Thaw frozen food before cooking
-cook several dishes at one time
-keep the door closed if inspection is needed peek through the window

  • Home Entertainment

-equipment’s are switched off at the plug, standby mode consume power
-ensure the power saver function if the computer is activated when left idle in between activities

  • Lighting

-Lights use are EE(energy efficient typ) eg Fluorescent type should be Energy
-Saving Lamp or Compact Fluorescent lamp, CFLs instead of incandescent type
-switch off when not in use

  • Water Heater

-Use the instant water heater compared the central water heater as it stores heated water and most times they are wasted. If you are choosing a storage type, get the correct size. A capacity of 25 liter is enough for a family of 4-5 members.

Energy Labels

When buying the appliances check for Energy Labels

-Air conditioning -EER(Energy Efficiency Ratio) the higher the ratio the more efficient is the air con. A minimum of 8 is good.

Zero Energy Homes

 Energy Labels for Zero Energy Homes

Lastly ensure when the Energy Labels are shown in your House Hold Products your purchase. Products  from the US, Thailand, UK and  Australian  have Energy Star Labels

Zero Energy Homes

Energy-Star Label. Energy efficiency, Zero Energy Homes

If you need further information with regards to converting your home to  Zero Energy Homes contact us for more information, If you need design a Net Zero Energy Home, kindly  contact us for further advise. Visit our website for products which will decrease your electric bill at http://www.sda-architect.com/

Prepared by Ar Perumal Nagapushnam

Your Name (required)

Your Email (required)

Subject

Your Message

The amount of energy generated is a function of the type of Photo voltaic Panels, the tilt of the panels, the racking type of the PV System,the size of the panels, and the tracking of the sun’s by tilting the panels. This article advises on the types of Photo voltaic panel and related matter about its basis unit of construction and the calculation of the energy generated by panels.

Types of Photo voltaic Panels

Photo voltaic Panels makes use of energy from the sun  and the generated energy is called Renewable energy.Typically most of our energy that are generated by the burning fossil fuel. This energy is harmful to the environment. unlike Renewable energy. The use of renewable energy is good clean energy,no harmful by product are produced such as CO, NO 2, SO 2 and dioxin, Dioxin is a very poisonous gas that is detrimental to health. Dioxin is more poisonous that cyanide. Dioxin has a great affinity for animals and water.On in-taking of Dioxin, the Dioxin will remain in their bodies for a long time, as the chemical is a very stable compound.

Renewable energy is good for the environment because there are clean energy and does not foul the air. The total amount of energy that the world consumes per year is only about 0.015 % of the energy that is available in the earth from the sun.

Photo Voltaic system

Photo Voltaic system are Grid-Connected where the surplus energy is sent to the grid . The surplus energy is purchased by utility company and on a winter week where there were less energy produced by the system, you may be able to access electricity from the Grid.

There are 4 Types of Photo voltaic Panels(as per NREL of the US)

  • Crystalline Si Cells——————–24% efficiency is achievable
  • Multi junction Concentrators——-40%  efficiency is achievable
  • Thin Film Technologies————–18%  efficiency is achievable
  • Emerging PV————————–10%  efficiency is achievable

The attributes of Properties of Types of Photo voltaic Panels

  • Crystalline Si Cells

    There are 2 types of Crystalline Photo-voltaic panels-mono crystalline and poly-crystalline.Both of them are made of silicon crystalline cells. Mono Panels are more efficient than Poly Panels.Poly Panels are less expensive than Mono Panels.They are made of thinly sliced wafers. The types of Crystalline Si Cells are:Single Crystal,Multi crystalline.Thick Si film and Silicon Hetro-structure

  • Multi junction Concentrators

    a) Multijunction Concentrators, are more efficient because the wider spectrum of the light is used for generating energy.
    b) Hetrojunction Concentrators, are a hybrid of crystalline and thin film .It is more efficient as it reaps the benefits of crystalline and thin film technology. It is more efficient when the temperatures are high.
    c) Concentrating Photo voltaic, are concentrates the photo voltaic spectrum increasing the solar isolation and making the panels efficient.
    d) Photo voltaic Thermal, are panels that combines the thermal and photo voltaic energy of the sun to produce energy.
    e) The types of Multi junction concentrators are: 3 junction,2 Junction and Single Junction GAas

  • Thin Film Technologies

    It uses low heat and cost lower than crystalline panels.The thin film technology permit the panels to be flexible enough to be used on roofing material. glazing or wall panels. Thin films are more efficient with high temperatures.
    The types of Thin film technologies are :Multi-junction poly-crystalline,Nano poly-Si, Amorphous SiH(stabilized),CdHe and Cu(In GaSc2)

  • Emerging PV

    Some of the photo voltaic panels which are emerging and may make a difference and become a state of art panel are: organic cells,dye sensitized cells and inorganic cells

Best situations for the  Types of Photo voltaic Panels for Maximum Efficiency

  1. Panels should be tilted to face the sun, or facing south if you are located in the Northern Hemisphere and face north if you are in the Southern Hemisphere.
  2. Photo voltaic panels on Roofs tops,Car park Coverings and shading louvers reduces the cost of construction.The cost of Roof covering is reduced. The cost of shading devices reduce cost.The cost of roof cover on car parking covers are reduced. Covering of car parking structures help to reduce the heat island effect.
Types of Photo voltaic Panels

Types of photo voltaic efficiency by NREL

Efficiency of the  Types of Photo voltaic Panels

The Photo voltaic solar Panels efficiency ranges from about 20% to 45%, the more efficient the more costly it would be and may make the technology uneconomical or not affordable to use them. we soon found that the most important factor that influences the choice of PV panel is cost and area of space limitation.c) the tilting of the panels
Power generation will defend on the features such as :panels which track the sun,roof installation or open system and the type of the PV panels.

The STEPS for  calculation of PV panels sizes is

Following the steps if you are mathematically savvy, otherwise you could seek the help PVwatts supplied by NREL-check it at http://pvwatts.nrel.gov/. The PVwatts calculator assumes a Grid connected system, the Steps below assumes off Grid connection system. The PVwatts calculator will produce the comparative cost savings in the system( over the utility bills) and will consider the technology used (Thin film, Premium, Standard), Racking system used( Roof or Open Rack, axis tracking system,1 axis tracking system or 2 axis tracking system) and the Tilt of the panels.

Step 1 – Calculate the daily energy consumed by the light fitting.

Energy required= Lamp Wattage × Operating Hours per day
= 13 watts × 8 hrs/day
= 104 watt-hrs/day

Step 2 – Calculate the electric energy that the PV panels need to generate.

Assumptions: the battery is 80% efficient and the discharge efficiency is 60%
Energy PV generates = Energy required daily / (Electronics Efficiency × Battery Charge/Discharge Efficiency)
= 104 watt-hrs/day/ 80% × 60%
= 217 watt-hrs/day

Step 3 – Calculate the amount of solar radiation that the PV panels need to collect each day.

ESolar Radiation Needed = EPV Produced/PV panel conversion efficiency
= 217 watt-hrs/day/10%
= 2170 watt-hrs/day

Step 4 – Calculate the average. daily solar radiation at the location of lighting system for the season with the lowest amount of solar radiation

The 30-year-average of monthly solar radiation on a horizontal, flat panel is 2900 watt-hours/square meter/day. And on a flat panel tilted to an angle of latitude plus 15 degrees (facing south), it is 5000 watt-hours/square meter/day, San Diego in December.

Step 5 – Calculate the size of the PV panels required

If the PV panel is in a horizontal position:
Size ,PV Panel = ESolar Radiation Needed/Daily Solar Radiation
= (2170 watt-hrs/day) / (2900 watt-hrs/m2/day)
= 0.75 m2
= ~8.2 sq ft

Plus 15 degrees (facing south) for PV panel tilted at an angle of latitude :
Size ,PV Panels = ESolar Radiation Needed/Daily Solar Radiation
= (2170 watt-hrs/day) / (5000 watt-hrs/m2/day)
= 0.43 m2
= 4.6 sq ft

Guidance to selection of the PV Panels:

The factors one uses to select the panels depends on the following:
a) Space for the panels either on the roof or with the site such as car park sheds or other places, louvers, wall panels etc
b) The amount of energy to be generated
c) The tilting of the panel
d) The tracking system
e) Roof installation or open system
f)  The Type of the PV panels

Integration of PV Panels with the Building

The integration of the PV Panels with the building will have make reduce the optimum level of performance of the panels. The panels. Panels performance will depend on its tilt, orientation and the ability to rotate along the seasonal solar path .
PV Panels can be integrated with roof covering( but need to be cautious as working space by the side of the roof and the top has to allowed for future maintenance).Roof top installation of Net Zero Energy achieve the highest categories of Net Zero Classification. The PV panels may replace the Car parking roof covering.This has it advantages such as easy maintenance and accessibility for maintenance. Facades and the louvers of openings can be constructed by PV panels.

 

COST

Check out our supply cost of (CLICK HERE) PV solar panels

Hyper Green architect

Green architect

 

 

 

 

Prepared by Architect Perumal Nagapushnam
System Design Architect

Home