Energy Efficiency Analysis and Comparison of Different Building Schemes and Window Types

Q1. From the list, find out which type of windows are the best in terms of U, SHGC and Tvis?

The Argon filled Double Pane Low-E squared in Insulated Vinyl Frame (U=0.3, SHGC=0.25,Tvis=0.52) is the best window frame.

Since the 30/30 rule has been maintained in it between U and SHGC.

Q2. Based on the U value, which wall should be the best?

The U-value is 0.3

Based on the R-value of the exterior, which wall will be the best? Based on the R-value of the interior, which wall will be the best?

Exterior Finish on 1+’’ rigid foam board R5 continuous, 2×6 wood studs at 24’’ with R21 cavity insulation, Gypsum board (U=0.047)

Q3. Due to the above change, which windows will have less heat gain?

The north window.

Which windows will have less heat loss?

The east window

Q4. Does single pane window increase or decrease the energy consumption?

Yes the single pane window reduces the energy consumption.

Since it allows more light in day time and hence the lights will be off during it.

Q5. Compare the energy rating with scheme 3. Why do you think the energy consumption has changed like this?

Q6. Which scheme spends the most on ACs?

The scheme 1 meets energy code

Which scheme spends the least?

The scheme 3 copy2: My first design

Which scheme spends the most on furnace fuel?

The scheme 4 single pane glass.

Which scheme spends the least?

The scheme 2 more energy efficient

SOUTH WALL

NORTH WALLS

EAST WALLS

WEST WALLS

Furnace Output

Air Conditioner output

Additional Problem

Energy rating

Energy cost

Energy efficient design

Discuss the results, whether the scheme is more or less energy efficient compared to scheme 3, what are the energy costs related to air conditioning, how many hours need heating/cooling

The scheme 5 and 6 are very much effective than the other schemes. There is a simple relation between U factor and SHGC. The more they are closer to each other, the more energy efficient house become.

The total 6862 hours when no heating and cooling needed for indoor cooling. The AC needs 1555 and 343 hours for heating and cooling respectively for scheme 3.

The AC needs 1305 and 379 hours for heating and cooling respectively for scheme 6.

The total 7228 hours when no heating and cooling needed for indoor cooling. The AC needs 638 and 894 hours for heating and cooling respectively for scheme 4.