Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 8, Problem 16P
To determine
Find the minimum outside temperature for which there is a benefit from passive solar heating.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Calculate the decrease in heat loss in kilowatt-hours per day when a 1.2 m x 2.1 m
uncoated single-pane window is replaced with a double-glazed window with a
low-e coating and argon fill (a relatively common configuration for current win-
dows). The inside temperature is a constant 20°C, and the outside temperature is a
constant -5°C.
Compute the solar irradiation and sol-air temepratures for a flat roof, for each hour of the day on July 21. Assume 0.4 percent outdoor design conditions. The roof has a solar absorptivity of 0.8, a thermal emissivity of 0.9, and an exterior surface conductance of 4.0 Btu/(hr-ft^2-F).
Solar Slab Storage. A passive solar home has a concrete slab in its main living area, 22' x 28' x 5" thick. On a winter day, the average slab temperature is 64.2F in the morning, and 73.4F in the afternoon when the sun sets. How much heat was absorbed by the slab (in kBtu)?
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- Assume an inside room temperature of 70°F and an attic air temperature of 15°F, with an exposed area of 885 ft2. Calculate the heat loss (in Btu/h) through the ceiling if the R-19 insulation batt is replaced by R-35 fiberglass insulation.arrow_forwardThermal Loading Calculation: Roof Cooling Load A 56 ft. by 82 ft. roof on a building in Miami, FL is constructed of 8 in. of lightweight concrete and has a suspended ceiling. The inside air temperature is 76 °F Find the roof cooling load at 2 pm Solar Time on May 30. O4,565 PTU/hr O 1,200 BTU/hr O3,936 BTU/hr O 8,754 BTU/hrarrow_forward100°? air flows through a round aluminum tube of ID 60mm and OD 80mm at 4 ?? .The tube is covered in 5mm thick fiberglass insulation. The tube is surrounded by RT air flowing at 5?? over the outside of the insulation. What is the heat rate through the wall of the tube? Assume that the air temperature is constant throughout the tube. Note: RT is 25 celsiusarrow_forward
- A room in a house is heated with radiant matting. The room floorplan is shown.The portion that has the matting is the shaded part and is 18 inches away fromeach of the walls. What is the area of the heat matting in square feet?arrow_forward1 Which of the following produces pure water day and night? a. Passive solar water still b. Solar dryer c. Forced circulation water heater d. Active solar water stillarrow_forwardHow can a gas-fired warm-air furance be used to cool a building?arrow_forward
- List at least three variables (structures) that affect the loss of heating and cooling in the building (house).arrow_forwardA well-insulated residential wall has a Uvalue of 0.05 and an R-value of 20 (in U.S. units). Compare the heat loss per square foot of the worst- and best-performing window and glazing combinations listed in Figure 18.21 with that of this wall.arrow_forward16. An igloo, or snow hut, is a type of shelter built out of snow traditionally used only by the people of Canada's Central Arctic and Greenland's Thule area. Conduct research to find the specific heat capacity values of the materials that igloos are built from. Then explain whether these are an efficient choice for design of a home in colder climates.arrow_forward
- Heat power loss from a district heating line with two separate pipes: How big is the loss in W / m? Conditions: Outer pipe diameter of 100 mm, insulation thickness of 50 mm, thermal conductivity of insulation of 0.03 W / mK, ground thermal conductivity of 1.5 W / mK, distance of 1 m between pipe center and ground surface, distance of 0.6 m between pipe center, forward temperature of 80 °C, return temperature of 50°C, and ambient temperature of 5°C.arrow_forwardH.WII Cooling Load Estimation An air conditioned room in the Basra city that measures 3 m wide, 3.5 m high and 6 m deep. The window size 1.5 m*1.5 m, mounted on the wall with no external shading and the door size 2m*1m. Calculate the sensible, latent and total heat gains on the room. What is the required cooling capacity? Assume all specification parameters that must be taken into account when calculating cooling load. 6 m 2 *1 m 3 m 1.5 * 1.5 m NW NE LNL E ESE SSW SSF SW SEarrow_forward(c) Solar passive design strategies emphasis on sun orientation as a major design consideration. Explain with illustrations how external shading devices can be used to reduce solar radiation and optimize daylighting in Malaysia context.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Engineering Fundamentals: An Introduction to Engi...Civil EngineeringISBN:9781305084766Author:Saeed MoaveniPublisher:Cengage Learning
Engineering Fundamentals: An Introduction to Engi...
Civil Engineering
ISBN:9781305084766
Author:Saeed Moaveni
Publisher:Cengage Learning