Calculate the heat loss per unit length for a calm day

Assignment Help Chemical Engineering
Reference no: EM131300719

A long, uninsulated steam line with a diameter of 89 mm and a surface emissivity of 0.8 transports steam at 200°C and is exposed to atmospheric air and large surroundings at an equivalent temperature of 20°C.

(a) Calculate the heat loss per unit length for a calm day.

(b) Calculate the heat loss on a breezy day when the wind speed is 8 m/s.

(c) For the conditions of part (a), calculate the heat loss with a 20-mm-thick layer of insulation (k = 0.08 W/m· K). Would the heat loss change significantly with an appreciable wind speed?

Reference no: EM131300719

Questions Cloud

Features of the compensation system : If you were hired by a company such as Antle, would you feel comfortable working under the compensation system it has in place? Why or why not? Depending on your response, outline what features of the compensation system would make you the happies..
Improved or eliminated through training : Identify basic causes for deficiencies in performance which of these deficiencies can be Improved or eliminated through training? Finally give a dynamic environment, how would you approach the deficiencies that can be reduce through training
How did the circumstances for african-american change the 20 : How did the circumstances for African-American (and potentially other minorities) change the 20th century after the establishment of the Jim Crow system following Reconstruction? Consider social, economic, political and geographic aspects of this..
Estimate the surface temperature of the cable : A horizontal electrical cable of 25-mm diameter has a heat dissipation rate of 30 W/m. If the ambient air temperature is 27°C, estimate the surface temperature of the cable.
Calculate the heat loss per unit length for a calm day : For the conditions of part (a), calculate the heat loss with a 20-mm-thick layer of insulation (k = 0.08 W/m· K). Would the heat loss change significantly with an appreciable wind speed?
Explain the pros and cons of four provider payment methods : Explain the pros and cons of four provider payment methods: (a) fee-for-service; (b) capitation; (c) global capitation; and (d) bundled payment.
Write about current real estate market condition : Write a 1 page review/commentary on an article from a magazine, newspaper, Wall Street Journal, etc. on the following topics. Topic: Current Real Estate Market Condition
Calculate the heat loss per unit length from the pipe : A horizontal rod 5 mm in diameter is immersed in water maintained at 18°C. If the rod surface temperature is 56°C, estimate the free convection heat transfer rate per unit length of the rod.
What would be your levels of expectancy : 1. What would be your levels of expectancy? Which outcomes would have high valence for you on this job? 2. What steps would your manager take to make sure you feel that you were being equitably treated? What would you do, if after a year on the job..

Reviews

Write a Review

 

Chemical Engineering Questions & Answers

  Calculate the inductance per unit length of the cable

What is the inductance if you assume the inner conductor to be a very thin shell with outer diameter 0.5 mm instead of a solid conductor?

  Calculate the resistance of the armature circuit

Calculate the resistance of the armature circuit and the field circuit.

  What are the power developed and the heat rejected

A Carnot engine receives 250 kW of heat from a heat-source reservoir at 798.15 K (525°C) and rejects heat to a heat-sink reservoir at 323.15 K (50°C). What are the power developed and the heat rejected?

  Determines the closed-loop system statespace matrices

Write a MATLAB function that, given the system statespace matrices A, B, and C, the desired closed-loop poles, and the observer poles, determines the closed-loop system statespace matrices of a full-observer state feedback system with integral act..

  Find the analytic solution by direct integration

Calculate the potential and electric field intensity everywhere inside the capacitor using a one-dimensional finite differences method.

  Is such a control scheme feasible

Is such a control scheme feasible? What would the designers need to do to eliminate potential problems?

  Compute the following given below

A balanced three-phase, wye-connected, 2400- V, 60-Hz source supplies two balanced wye connected loads in parallel. The first draws 15 kVA at 0.8 power factor lagging, and the second needs 20 kW at 0.9 power factor leading.

  Concentration of solutes in the kidney medulla

Consider the case of a rare mutant in which the concentration of solutes in the kidney medulla interstitial spaces is equal to the concentration of solutes in the liquid in thelumen of the medullary collecting duct in the kidney.

  Find the rotor copper loss at full load

Find the rotor copper loss at full load and the speed at maximum torque. Compute the value of the per-phase rotor resistance (referred to the stator) that must be added in series to produce a starting torque equal to the maximum torque.

  Boiling point of water

A scheme for concurrently heating separate water and air streams involves passing them through and over an array of tubes, respectively, while the tube wall is heated electrically. To enhance gas-side heat transfer, annular fins of rectangular pro..

  Why the value of the normalized ratio in a pulse oximeter

Explain why the value of the normalized ratio (R) in a pulse oximeter is independent of the volume of arterial blood entering the tissue during systole.

  Elementary second order adiabatic reaction

An elementary second order adiabatic reaction A+ B CD ? + is taking place in a CSTR. The feed to the reactor is equimolar A and B at concentrations of 2.4 mol/liter. The entering temperature is 300 K.

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