Please and explain step by step, instructions given at top Your family just bought a very small cabin in Estes Park, CO, and they have asked you to help figure out heatingcosts for the building. Since your grandparents plan to stay at the cabin often and they like it warm, you decidethat you need to be able to achieve 23 "C in the winter. Assuming a minimum heat output of 2 people, 2 lamps, aTV, a computer and a refrigerator, you've figured out that a reasonable estimate for total internal gain rate is 600W. You calculate that the whole building heat transfer coefficient for the existing cabin is 400 W/K.Note that some questions may have values that are randomly generated and will change on second homeworkattempts. You will need to revise your mathematics, but the methodology and formulas remain the same.Question 1How much heating power (W) would be necessary to keep the cabin interior at 23Cif the exterior temperature is -10C?Question 2Before the following winter, you have implemented some significant energy efficient measuresand reduced the whole building heat transfer coefficient to 200 W/K. Still under the decisionto achieve 23 "C inside temperature in the winter, you suggest that a compact gas-fired stovewould create a nice ambiance while saving your family money compared to other options, suchas electric resistance heaters. You look up the average annual minimum temperature in EstesPark, which is -7 "C (winter design temperature). Determine the size (heating capacity) of thestove you would need to meet the peak heating energy that needs to be supplied to thehome. (Note: one sizes the furnace for "worst case" conditions, which means that you ignorethe benefits of internal gains.). Provide the answer for the furnace size in watts rounded to thenearest watt.Question 3Given the internal gains, and the whole building heat transfer coefficient of 200 W/K followingrenovations, below what outdoor air temperature will the cabin need to be actively heated (thebalance point temperature)?Question 4How much will it cost annually to heat the renovated cabin with the gas stove, assuming thestove is 78% efficient and gas costs $2.00/therm? (1 therm = 105,480 kJ). Assume that theAnnual Heating Degree Days for the correct teo is 5290 HDD ("C-day).Don't forget the efficiency of the stove, and check your units carefully - it will help avoidmistakes! Also think carefully about the concept and equation for efficiency before justplugging in numbers - should the energy you pay for be more or less than what goes intoheating the house? What makes sense?Round your answer to the nearest dollar.

GIVEN: Temp to be achieved = 23° C The internal gains = 600 W The Heat transfer of the whole…

Your family just bought a very small cabin in Estes Park, CO, and they have asked you to help figure out heating costs for the building, Since your grandparents plan to stay at the cabin often and they like it warm, you decide that you need to be able to achieve 23 "C in the winter. Assuming a minimum heat output of 2 people. 2 lamps, a TV, a computer and a refrigerator, you've figured out that a reasonable estimate for total internal gain rate is 600 W. You calculate that the whole building heat transfer coefficient for the existing cabin is 400 W/K. Note that some questions may have values that are randomly generated and will change on second homework attempts. You will need to revise your mathematics, but the methodology and formulas remain the same.

Your family just bought a very small cabin in Estes Park, CO, and they have asked you to help figure out heating costs for the building, Since your grandparents plan to stay at the cabin often and they like it warm, you decide that you need to be able to achieve 23 "C in the winter. Assuming a minimum heat output of 2 people. 2 lamps, a TV, a computer and a refrigerator, you've figured out that a reasonable estimate for total internal gain rate is 600 W. You calculate that the whole building heat transfer coefficient for the existing cabin is 400 W/K. Note that some questions may have values that are randomly generated and will change on second homework attempts. You will need to revise your mathematics, but the methodology and formulas remain the same.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter11: Heat Transfer By Radiation

Section: Chapter Questions

Problem 11.1DP

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