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Sensible Heat Transfer Concepts

Sensible Heat Transfer Concepts

Assessment

Interactive Video

Physics

9th - 10th Grade

Practice Problem

Hard

Created by

Patricia Brown

FREE Resource

This video tutorial explains the sensible heat transfer equation for water, focusing on calculating BTUs when given GPM and temperature differences. It covers the formula Q = GPM * 500 * delta T, explaining each component, including the derivation of the constant 500. The video concludes with a unit analysis to ensure the calculation results in BTUs per hour.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary purpose of the sensible heat transfer equation discussed in the video?

To calculate the latent heat of water

To measure the humidity of the air

To determine the state change of water

To find one of the variables BTUs, GPM, or delta T when the other two are known

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does sensible heat involve?

A change in the temperature of water without a state change

The freezing of water

A change in the state of water

The conversion of water to steam

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the example provided, what is the delta T when the supply water is 120°F and the return water is 80°F?

50°F

40°F

30°F

20°F

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula used to calculate BTUs in the video?

Q = GPM * 400 * delta T

Q = GPM * 500 * delta T

Q = GPM * 600 * delta T

Q = GPM * 700 * delta T

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many BTUs per hour are calculated in the example with 200 GPM and a delta T of 40°F?

3 million BTUs per hour

2 million BTUs per hour

5 million BTUs per hour

4 million BTUs per hour

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the weight of water used in the derivation of the constant 500?

10.34 pounds per gallon

9.34 pounds per gallon

8.34 pounds per gallon

7.34 pounds per gallon

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the specific heat of water used in the calculation?

0.5 BTU per pound per degree F

1 BTU per pound per degree F

1.5 BTU per pound per degree F

2 BTU per pound per degree F

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