THE HOME INSULATION DESIGN Marshmallows 4 th period

THE HOME INSULATION DESIGN Marshmallows 4 th period – Group A

DEFINE THE PROBLEM � Given: Construct a renewable insulated minihouse that keeps heat trapped in the house best.

BRAIN STORM - Chocolate - Fur - Paper Marshmallows - Hotdogs - Wool - i. Phones -

RESEARCH AND GENERATE IDEAS • Which materials are least expensive? • Where can I find small amounts of these materials? • Which materials do I have easy access to? • Check R-Values for different insulation options. • Does the highest R-Value mean it’s the best choice?

IDENTIFY CRITERIA AND CONSTRAINTS � � � House is made of cardboard “walls” with renewable insulation between the two layers of cardboard. Insulation must be ½” thick around the outside of the house. House can be one or two rooms. One room homes will use 4 bulbs for the heat source. Two room homes will use 8 bulbs for their heat source. Home dimensions are 9”x 5” (apply ½” insulation after dimensions) for 1 room and 14”x 5” (apply ½” insulation after dimensions) for 2 room. Two room mini-homes will be separated with a 2”x 1. 5” door. Insulation will be between the

EXPLORE POSSIBILITIES Marshmallow – high R-value, renewable (not good if melts) � Paper – decent R-value, renewable (available) � Wool – high R-value, renewable (available) � Cotton – middle R-value, renewable (available) � Feathers – decent R-value, renewable (no access) � Yarn – lowest R-value, renewable (available) � i. Phones – high R-value, nonrenewable (too expensive) � Fur – decent R-value, renewable (no access) �

SELECT AN APPROACH Decision Matrix R-Value Accessibility Cost Total Marshmallows 4 3 4 - low 12 Chocolate 2 2 4 8 Fur 4 3 2 9 Wool 4 4 1 8

DESIGN 6 x 10 x 5 in

MAKE A MODEL/ PROTOTYPE �

DATA Readings (°F) 79 78, 5 78 77, 5 77 76, 5 75, 5 0: 00 0: 01: 00 0: 02: 00 0: 03: 00 0: 04: 00 0: 05: 00 0: 06: 00 0: 07: 00 0: 08: 00 0: 09: 00 0: 10: 00 0: 11: 00 0: 12: 00 0: 13: 00 0: 14: 00 0: 15: 00 0: 16: 00 0: 17: 00 0: 18: 00 0: 19: 00 0: 20: 00 0: 21: 00 0: 22: 00 0: 23: 00 0: 24: 00 0: 25: 00 0: 26: 00 0: 27: 00 0: 28: 00 0: 29: 00 0: 30: 00 0: 31: 00 0: 32: 00 0: 33: 00 0: 34: 00 0: 35: 00 0: 36: 00 0: 37: 00 0: 38: 00 0: 39: 00 0: 40: 00 0: 41: 00 0: 42: 00 0: 43: 00 0: 44: 00 0: 45: 00 0: 46: 00 0: 47: 00 0: 48: 00 0: 49: 00 0: 50: 00 0: 51: 00 0: 52: 00 0: 53: 00 76 10: 24: 51 10: 25: 21 10: 25: 51 10: 26: 21 10: 26: 51 10: 27: 21 10: 27: 51 AM 10: 28: 21 AM 10: 28: 51 AM 10: 29: 21 AM 10: 29: 51 AM 10: 30: 21 AM 10: 30: 51 AM 10: 31: 21 AM 10: 31: 51 AM 10: 32: 21 AM 10: 32: 51 AM 10: 33: 21 AM 10: 33: 51 AM 10: 34: 21 AM 10: 34: 51 AM 10: 35: 21 AM 10: 35: 51 AM 10: 36: 21 AM 10: 36: 51 AM 10: 37: 21 AM 10: 37: 51 AM 10: 38: 21 AM 10: 38: 51 AM 10: 39: 21 AM 10: 39: 51 AM 10: 40: 21 AM 10: 40: 51 AM 10: 41: 21 AM 10: 41: 51 AM 10: 42: 21 AM 10: 42: 51 AM 10: 43: 21 AM 10: 43: 51 AM 10: 44: 21 AM 10: 44: 51 AM 10: 45: 21 AM 10: 45: 51 AM 10: 46: 21 AM 10: 46: 51 AM 10: 47: 21 AM 10: 47: 51 AM 10: 48: 21 AM 10: 48: 51 AM 10: 49: 21 AM 10: 49: 51 AM 10: 50: 21 AM 10: 51: 21 AM 10: 51 AM 10: 52: 21 AM 10: 52: 51 AM 10: 53: 21 AM 10: 53: 51 AM 10: 54: 21 AM 10: 54: 51 AM 10: 55: 21 AM 10: 55: 51 AM 10: 56: 21 AM 10: 56: 51 AM 10: 57: 21 AM 10: 57: 51 AM 10: 58: 21 AM 10: 58: 51 AM 10: 59: 21 AM 10: 59: 51 AM 11: 00: 21 AM 11: 00: 51 AM 11: 01: 21 AM 11: 01: 51 AM 11: 02: 21 AM 11: 02: 51 AM 11: 03: 21 AM 11: 03: 51 AM 11: 04: 21 AM 11: 04: 51 AM 11: 05: 21 AM 11: 05: 51 AM 11: 06: 21 AM 11: 06: 51 AM 11: 07: 21 AM 11: 07: 51 AM 11: 08: 21 AM 11: 08: 51 AM 11: 09: 21 AM 11: 09: 51 AM 11: 10: 21 AM 11: 10: 51 AM 11: 21 AM 11: 51 AM 11: 12: 21 AM 11: 12: 51 AM 11: 13: 21 AM 11: 13: 51 AM 11: 14: 21 AM 11: 14: 51 AM 11: 15: 21 AM 11: 15: 51 AM 11: 16: 21 AM 11: 16: 51 AM 11: 17: 21 AM 11: 17: 51 AM AM 11/16/2012 11/16/2012 11/16/2012 11/16/2012 11/16/2012 11/16/2012 11/16/2012 11/16/2012 11/16/2012 11/16/2012 11/16/2012 11/16/2012 11/16/2012 11/16/2012 11/16/2012 11/16/2012 11/16/2012 11/16/2012 11/16/2012 11/16/2012 11/16/2012 11/16/2012 11/16/2012 11/16/2012 11/16/2012 11/16/2012 11/16/2012 (°F) 12345678910 11 2 13 14 15 16 17 18 19 20 21 22 3 24 25 26 27 28 29 30 31 32 33 4 35 36 37 38 39 40 41 42 43 44 5 46 47 48 49 5 Readings 0 51 52 53 54 55 6 57 5 8 59 60 61 62 63 64 65 66 7 68 69 70 71 72 73 74 75 76 77 8 79 80 81 82 83 84 85 86 87 88 9 0 91 92 93 94 95 96 97 98 9100 9101 102 103 104 105 106 107

71 0: 00 0: 01: 00 0: 02: 00 0: 03: 00 0: 04: 00 0: 05: 00 0: 06: 00 0: 07: 00 0: 08: 00 0: 09: 00 0: 10: 00 0: 11: 00 0: 12: 00 0: 13: 00 0: 14: 00 0: 15: 00 0: 16: 00 0: 17: 00 0: 18: 00 0: 19: 00 0: 20: 00 0: 21: 00 0: 22: 00 0: 23: 00 0: 24: 00 0: 25: 00 0: 26: 00 0: 27: 00 0: 28: 00 0: 29: 00 0: 30: 00 0: 31: 00 0: 32: 00 0: 33: 00 0: 34: 00 0: 35: 00 0: 36: 00 0: 37: 00 0: 38: 00 0: 39: 00 0: 40: 00 0: 41: 00 0: 42: 00 0: 43: 00 0: 44: 00 0: 45: 00 0: 46: 00 0: 47: 00 0: 48: 00 0: 49: 00 0: 50: 00 0: 51: 00 0: 52: 00 COMPARE 85 83 81 Series 2 79 Series 3 Series 4 Series 5 77 Series 6 Series 7 75 Series 8 Series 9 73 Series 10 Series 11 Series 12

MORE DATA � � � � � Q = AU(Tf-Ti)* (78. 7 – 77 = 1. 7) A= 10 * 6 = 60 Q =. 4455 * 1. 244 * 1. 7 =. 94 Q =. 94 P =. 9421435 * 1. 7 = 1. 602 P =1. 602 U = 1. 602 / (60 * 1. 7) =. 0439 Rvalue = 5. 6 2/32*60 = 78. 7 – 77 = 1. 7

REFLECTION… Though our house was well built, and marshmallows had a high R Value, the problem was that our choice of marshmallows did not work because of extra air space. The once fluffy marshmallows after a week had dried up and left mostly airspace, so the marshmallows only took up about half of the area, If the project would have been done earlier and the marshmallows would have retained heat much better as the surface are would have been far greater.