A 6 in. schedule 800 steel pipe (OD =6.62 in) will be used to transport 450 F steam from a boiler house to a new process unit. the pipe will be buried at a depth of 3 ft (to be pipe centerline). the soil at the plant site has an average thermal conductivity of 0.4 btu/h.ft F and the minimum expected ground surface temperature is 20 F. Estimate the rate of heat loss per loot of pipe length for the following cases: a. the pipe is not insulated b. the pipe is covered with a 2 in. thick layer of magnesia insulation

The gas phase reaction: 2A+B = 3C , is carried out in an isothermal packed bed reactor. The rate is first order with respect to reactants A and B (second order overall) with the rate constant of 14 [liter2 /mole kg of catalyst sec.]. The feed is 50% A, 25 % B and 25 % inert at temperature of 500 K and P = 18 atm and a total flow rate of 20 mole/sec. The exit pressure is measured to be 6 atm. To produce 12 mole/sec of product C,

a) Write the relevant equations and using POLYMATH, give the profile of pressure and conversion along the catalyst bed till its exit, where the conditions are given above (Pexit = 6atm, Fc=12 mole/sec)

b) Calculate the amount of catalyst needed

c) Calculate the amount of catalyst needed, if the pressure drop in the reactor is ignored.

how can make a doctor really feels the touch sensation while using a surgical robot? i need a plan that aims to create a system of haptic feedback that actually let the doctor feel what the robot is touching
(i just need a logical sequence of ideas without elaboration)

The steel beam has the cross section shown. The beam length is L = 6.9 m, and the cross-sectional dimensions are d = 345 mm, bf = 185 mm, tf = 15 mm, and tw = 10 mm. Calculate the largest intensity of distributed load w0 that can be supported by this beam if the allowable bending stress is 185 MPa.

Space-based solar is gaining interest. Arrays of solar panels are placed in orbit to capture solar energy. The energy is then transmitted wirelessly to earth. The primary advantage being that a space-based photovoltaic array receives the full AM0 solar radiation for potentially 24 hours per day. What wireless power transmission efficiency is necessary to compete with an equivalent PV array in Honolulu on 23 March 2018 from both a power and an energy perspective?

A double-pipe heat exchanger is used to condense steam at 40°C saturation temperature. Water at an average bulk temperature of 20°C flows at 2 m/s through the inner tube (copper, 2.54 cm ID, 3.05 cm OD). Steam at its saturation temperature flows in the annulus formed between the outer surface of the inner tube and outer tube of 6 cm ID. The average heat transfer coefficient of the condensing steam is 6,000 W/m² ? K, and the thermal resistance of a surface scale on the outer surface of the copper pipe is 0.000176 m² ? K/W. a. Determine the overall heat transfer coefficient between the steam and the water based on the outer area of the copper tube. b. Evaluate the temperature at the inner surface of the tube. c. Estimate the length required to condense 0.5 kg/s of steam.

Explain a few aspects of how patents may be change, or their importance may change, due to the advent of 3d printing and related technologies.

Protolabs is one of the companies changing the economics of injection molding by 3d printing

molds. Why does this change the cost reckoning of injection molded parts?

The US Postal Service has recently commissioned a study of the effects of 3d printing on its business. Some were pessimistic, saying 3d printing would be bad for the postal service, while others were optimistic, saying that 3d printing would be a boom to the postal service. Why do you suppose informed people could hold such divergent views?

How might product liability law be disrupted by 3D printing?

Thermodynamics

ANSWER: 1,713.4

Determine the specific enthalpy of 1.5 kg of water contained in a volume of 0.73 m³ at 200 kPa.

What is the importance of S11 parameter in one-port antenna measurements?

Explain the motions of each mechanism in an excavator arm