Science Assignment: Part 1 & Part 2
Energy Efficient Homes
15 November 2013 Term 4
Peace Lutheran College Year 8
ScienceTask: Energy Efficient Homes
Name: Faith Kumung Due Date: Part 1 due Monday, Part 2 due Friday
As the earth’s resources dwindle, an increasing number of people are opting for a more self-sufficient lifestyle. People are beginning to see the financial and ethical benefits of building a house that is sustainable: it is both energy efficient and water efficient. Some examples include choosing recycled materials, heat insulation, using solar energy and having energy efficient appliances.
Stage 1: The Investigation
Title: The Effect of Circulation on Heat Loss
Aim: Investigating the Effect of Circulation on Heat loss. To determine whether the multiplication of windows will affect the heat loss in the cardboard box house.
Introduction: In this experiment we are testing the Effect of air circulation in the box house on heat loss. The box house, during all the testings, will be outside the science lab. Our testing will take place on Monday, Thursday and Friday in Science lessons. The testings altogether will take nearly over five hours.
Variables: House (independent)TemperatureHypothesis: The heat will start cooling down, every time we make a new window, and causing the temperature to change or fall lower.
Cardboard House and Cardboard Lid(Cardboard Box)
Risk Assessment: Stanley knife: the Stanley knife is very sharp, do not point or use unnecessarily. Sticky tape: Do not use on people or science lab objects without permission.
Procedure: Step1) Choose a box (with a lid) without any windows
Step2) Get help -if you need- to set the Data Log for the testing.
Step3) Once the Data Log is done setting up, place the inside the box and shut the lid and once inside, start the time.
Step4) If you are out of your science lab for testing, place something heavy on the box so that it will not fall over or fly away.
Step5) Keep checking the box and Data Log while waiting.
Step6) When the testing is finished, remove the Data Log from the box, take both into the Science Lab, and then ask to be emailed or printed the results.
Method: Our group is setting the time for 1 hour and getting data every 10 minutes. Our group is going to test on Fridays at approximately 12 o'clock - if we have enough time.
Some ideas include:
• How does circulating air affect the temperature in your house?
• Which materials make the best insulators
?• Is there a relationship between depth of still air insulating the walls and temperature in the house?
• How effective is shade at cooling the house?
• What depth of roof insulation is most effective to insulate the house?
• How do reflective surfaces affect radiating heat in the house?
• How does the orientation or the size of windows affect the temperature of the house.
Discuss your ideas with your teacher. Ensure that you only change one variable (independent) and your dependant variable will be the temperature inside the house. All other variables must be controlled.
Stage 2: Researching & Designing your Sustainable Home.
Some ideas to research and include in your report include:What insulation will you use?
What will you use for electricity? What type of electrical appliances will you use?How will you make sure your home is water-efficient?In Australia, the average 2,000 litre capacity Water-tank CAN save up to 26,000 litres every year. The water saving of this could be higher up to around 59,000 litres per year.
My ideas:Showers- and baths - are culprits for 25% of water used in the average Australian home. Limiting down the time you use it to 2 or 3 minutes with save around 24 litres each day.Thinking smart about Eco-friendly Washing machines- When buying a new washing machine, select the highest WELS rate with it. A WELS that rates 4 uses 41% less water then a conventional washing machine.
How will you orientate your house? (remember we live in the southern hemisphere)
My windows (solar glazers)will be 5 degrees of true south - they will be facing south -. My house will also be long, reaching houses on both my sides, because if my house is that way more of the suns mass will be situated to absorb and radiate heat during the winter.
Convection and air - a convection Oven is able to take in all racks without disturbing the other food in the oven. The hot air circulates between all racks and heats all food surfaces without the food being rotated.How will you design your garden to incorporate shade?My garden will be on the back balcony of my house. That way the roof and inside coolness and the sunlight from outside can help the garden grow. What size windows and doors will you have?Normal size doors '. ' and windows '. '
Your final report must include both stage 1 & 2, your investigation is to be written as explained in guidelines. This data will then be used to support your other research to help you explain and justify your design of an energy-efficient home. Submit your report in the format required by your teacher.