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A piece of hemlock wood measuring 15.15 x 14.8 x 0.75 cm is to be dried from the two large faces from an initial total moisture content of 90% to a final average total moisture content of lo%, with drying taking place in the falling-rate period with liquid-diffusion controlling. The moisture diffusivity has been experimentally determined as 1.7 x 10-6 cm2/s. Estimate the drying time if bone-dry air is used. All moisture contents are on a dry basis.
A process to produce 1000 kgmol/h acetaldehyde, ethane is fed to the reactor at 1500 kgmol/h and the fractional conversion is 0.8. The product stream contains 2 mol% CO2. Calculate the molar composition of the product stream and the fractional select..
You have a heat pump that takes in 256 kW of heat and puts out 604 kW of heat. What is the coefficient of performance (C.O.P.) of the system ( express this value as a fraction)?
question 1a handling operations for solidpowder substances are often a source of dust generation and are a source of
What are the attractive characteristics of Green Fuels and Chemicals and comment on the impact of either fossil fuels or biodiesel on mangrove forests.
In the direct steelmaking reactor based on the reduction of an oxidizing foaming slag by char (carbon) particles and droplets of iron containing 2% carbon. Estimate the total surface area of char and iron droplets needed to achieve the smelting ..
Describe the principles of a vapour adsorption refrigeration system, and compare this to a vapour recompression system. Which of the two systems is more suitable for refrigeration processes in a brewery or distillery and why?
air at 4mpa and 3000c enters a will insulated turbine operating at steady state with negligible velocity. the air
Chemical Oxygen Demand (COD, microbiological quality of drinking waters, Oxygen Sag curves, landfill gas, integrated hazardous waste management plan
question 1a identify the components of a fire triangleb explain the condition required for combustion process to be
process principles assignment production of formaldehydeworld formaldehyde production is estimated to be about 8
Give the approximate minimum temperature at which it is possible to austenitize each of the following iron-carbon alloys during a normalizing heat treatment:
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