Find the ratio = convective heat loss /radiation loss

Assignment Help Mechanical Engineering
Reference no: EM131090526

Hot water pipes in a home typically move water at a temperature of roughly 110 F = 43 C. We want to compare heat loss due to convection to heat loss due to radiation. The heat transfer coefficient inside the thin copper pipe is 250 W/m2-C, while the outer h = 14 W/m2-C. For this estimate we will treat the pipe as a blackbody, and ignore any back-radiation from the room, which has a temperature of 20 C. State any assumptions or approximations you make, and find the ratio = convective heat loss / radiation loss?

a) 97

b) 8.7

c) 14

d) 71

e) 0.54

Reference no: EM131090526

Questions Cloud

What is the function of amylase : UMUC Biology 102/103 Lab 4: Enzymes. What were your controls for this experiment? What did they demonstrate? Why was saliva included in this experiment? What is the function of amylase? What does amylase do to starch
Organizations and all stages in the supply chain : Business competition has shifted from company versus company to supply chain versus supply chain. The scope of strategic fit comprises of functions with an organizations and all stages in the supply chain.
Estimate the tip temperature of your pinky finger : Estimate the tip temperature of your pinky finger
What is the critical thickness of insulation : What is the "critical thickness" of insulation, such that if the layer were any thinner, the insulation would actually cause the heat flux to increase?
Find the ratio = convective heat loss /radiation loss : State any assumptions or approximations you make, and find the ratio = convective heat loss / radiation loss?
Identify the research objectives of cola : 1. What different type of research methods were used by Cola? Discuss the research instruments used and how samples were acquired. Which population was surveyed and the contact methods used?
Develop a complete business case for an idea : Develop a complete business case for an idea. This may be a real example from your work environment or a fictional example from anywhere you choose.
How does this complicate the process of public policy : The federal system decentralizes political authority and this inevitably affects public administration’s operations at all levels of government. Administration accordingly occurs within a complex environment in which authority is shared among differe..
Why can''t vacation pay and regular pay be combined : Is the cost of product warranties going up or down now on a company's books?

Reviews

Write a Review

Mechanical Engineering Questions & Answers

  A pressure gage reading is 20 mm deltahg if the gage is

a pressure gage reading is 20 mm deltahg. if the gage is located at an elevation of 2000m.what is the absolute

  Problem regarding the piston-cylinder assembly

One kilogram of water contained in a piston-cylinder assembly, initially at 1608C, 150 kPa, undergoes an isothermal compression process to saturated liquid. For the process, W 5

  You are required to investigate the dynamic movement of a

you are required to investigate the dynamic movement of a mass m sliding along a rod as shown in the diagram below. the

  Determine a the thermal efficiency of the cycle b the mass

consider a steam power plant that operates on a simple ideal rankine cycle and has a net power output of 45mw. steam

  Kinetic energy of the system of two blocks

By how much does the total kinetic energy of the system of two blocks change because of the collision?

  A piston cylinder device initially contains steam at 35 mpa

a piston cylinder device initially contains steam at 3.5 mpa superheated by 5 c. steam loses heat to the surrounding

  Determine rate of heat rejection to environment in mw

A steam power plant with a power output of 160 MW consumes coal at a rate of 62 metric tons per hour. If the heating value of the coal is 29900 kJ/kg, determine the overall efficiency of the plant.

  Determine a the mass flow rate of the refrigerant b the

a heat pump using r-134a as its working fluid is used to keep a space at 25degc by absorbing heat from geothermal water

  A curved nozzle assembly that discharges to the atmosphere

a curved nozzle assembly that discharges to the atmosphere is shown. the nozzle mass is 4.5 kg and its internal volume

  What are the design implications for the location

What are the design implications for the location and positioning of solar cells? Explain why the use of solar cells might be more appropriate in some regions of the country.

  An insulatedthin walled pipe of 100mm diameter is used to

an insulatedthin walled pipe of 100mm diameter is used to transport water to equipment that operates outdoors and uses

  A nitrogen line 300 k and 05 mpa shown in the figure is

a nitrogen line 300 k and 0.5 mpa shown in the figure is connected to a turbine that exhausts to a closed initially

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd