Geography College

1. How many heating degree-days would there be in a city when the maximum temperature is 53°F and the minimum temperature is 25°F? Show your work.
2. How many cooling degree-days would there be in a city when the maximum temperature is 78°F and the minimum temperature is 56°F? Show your work.
Time limit: 30 minutes

Answers

Answer 1

1. Heating degree-days calculation:

Average outdoor temperature = (Maximum temperature + Minimum temperature) / 2

= (53°F + 25°F) / 2

= 39°F

Heating degree-days = (65°F - 39°F)

= 26 degree-days

2. Cooling degree-days calculation:

Average outdoor temperature = (Maximum temperature + Minimum temperature) / 2

= (78°F + 56°F) / 2

= 67°F

Cooling degree-days = (Average outdoor temperature - 65°F)

= (67°F - 65°F)

= 2 degree-days

The number of heating degree-days is 26, and the number of cooling degree-days is 2.

Heating degree days are used to estimate the amount of energy needed to heat a building

For example, energy providers can use heating and cooling degree-day data to anticipate demand and adjust energy supply accordingly, while building managers can utilize this information to optimize temperature control systems and reduce energy costs based on seasonal variations. Climate analysts can also study degree-day trends to assess long-term climate patterns and their impact on energy consumption.

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Answer 2

Answer:

Heating degree-days (HDD) are a measure of how much the daily average temperature falls below a base temperature, usually 65°F. The daily average temperature is calculated by adding the maximum and minimum temperatures and dividing by two. The HDD is then the difference between the base temperature and the daily average temperature. If the daily average temperature is above the base temperature, the HDD is zero.

To calculate the HDD for a city when the maximum temperature is 53°F and the minimum temperature is 25°F, we first find the daily average temperature:

Daily average temperature = (53°F + 25°F) / 2 = 39°F

Then we subtract the daily average temperature from the base temperature:

HDD = 65°F - 39°F = 26°F

Therefore, there would be 26 heating degree-days in the city.

2. Cooling degree-days (CDD) are a measure of how much the daily average temperature rises above a base temperature, usually 65°F. The daily average temperature is calculated by adding the maximum and minimum temperatures and dividing by two. The CDD is then the difference between the daily average temperature and the base temperature. If the daily average temperature is below the base temperature, the CDD is zero.

To calculate the CDD for a city when the maximum temperature is 78°F and the minimum temperature is 56°F, we first find the daily average temperature:

Daily average temperature = (78°F + 56°F) / 2 = 67°F

Then we subtract the base temperature from the daily average temperature:

CDD = 67°F - 65°F = 2°F

Therefore, there would be 2 cooling degree-days in the city.

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