The Unit Operations Laboratory consists of a Continuous Distillation pilot-plant (Figure 1). The plant is mainly composed of a mash-packing column, pre-heater with electrical resistor, a condenser, feed pump and a double-pipe heat exchanger. The pre-heater is used to heat up the raw material that is fed into the column on a continuous basis. The pre-heating system has not been used since the beginning of lockdown (March 2020). This often has detrimental effects on the performance of the pre-heater. You are required to perform a pre-liminary design study to investigate the extent of loss on the performance. The resister is operated to release 38.3% of its maximum capacity (W) and is used to heat the water to a state of saturated steam at a vapour pressure of 2500 dyn/cm². Pre-Heater AU 2. 8. o M v O 10-3 99 OOO L e: Figure 1. P&ID diagram for a Continuous Distillation pilot-plant. a) Determine the surface (wall) temperature (°C) of the heating resistor using Fig. 2 [Hint: A = ndh + d² b) Estimate the boiling heat transfer coefficient, in W/m². K and determine the percentage reduction if the initial coefficient was 63 000 W/m². K.

The Unit Operations Laboratory consists of a Continuous Distillation pilot-plant (Figure 1). The plant is mainly composed of a mash-packing column, pre-heater with electrical resistor, a condenser, feed pump and a double-pipe heat exchanger. The pre-heater is used to heat up the raw material that is fed into the column on a continuous basis. The pre-heating system has not been used since the beginning of lockdown (March 2020). This often has detrimental effects on the performance of the pre-heater. You are required to perform a pre-liminary design study to investigate the extent of loss on the performance. The resister is operated to release 38.3% of its maximum capacity (W) and is used to heat the water to a state of saturated steam at a vapour pressure of 2500 dyn/cm². Pre-Heater AU 2. 8. o M v O 10-3 99 OOO L e: Figure 1. P&ID diagram for a Continuous Distillation pilot-plant. a) Determine the surface (wall) temperature (°C) of the heating resistor using Fig. 2 [Hint: A = ndh + d² b) Estimate the boiling heat transfer coefficient, in W/m². K and determine the percentage reduction if the initial coefficient was 63 000 W/m². K.

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.

Chapter9: Heat Transfer With Phase Change

Section: Chapter Questions

Problem 9.11P

See similar textbooks

Similar questions

In the following set of questions, we will consider a mercury-in-glass thermometer. The tworeference points will be assigned 0.01◦C and 100◦C based on the triple point and boiling point ofwater. a) Remark on the the rationale for selecting references based on phenomena such as phase transi-tions. Identify any prospective issues or special considerations one might have with this approach? b) Draw a schematic of a mercury-in-glass thermometer. Define an appropriate set of universe,system, and surroundings and explain the functional operation of thermometer from a thermody-namic analysis perspective. In your response, you should describe how energy flows and influencesmatter. Is your system open or closed? What kind of boundary do you have? What kind ofapproximations (if any) do you make for the reliable determination of temperature based on yourdecomposition of universe, system, and environment?
Combustion of a fuel sampie in a bomb calorimeter increases the temperature of the entire system by 5.10 °C if the calorimeter contains 1500 g of water, but only by 4.00 "Cif the calorimeter contains 1950g of water. What is the heat capacity of the dry bomb calorimeter assembly? Assume that the specific heat capacity of water is 4.18 J A. 570 J "C- B. 912 J "C-1 C. 722 J "C- D. 366 J "C-1 E. 494 J "C-
The topic is Bernoulli Differential Equations; Newton’s Law of Cooling. Please put a bit of explanation if you can.
Make up a multiple-choice question about evaporation and condensation energy changes.
@ Draw a neat sketch for a seive tray column for gas-liquid contact. Label the main parts of such column? And what are other types of trays?
8. Describe how it is possible to find n parameter in gas well IPR equation. Ancuor!
Thermal properties of mould and Iron is given as latent heat of iron = 270 the freezing temperature of iron = 1500 C. the density of molten iron = 7500 kg kJ kg-K the specific heat of mould material = 1.2 the themal condudivity of mould material = 09 Wm-K the density of the mould material = 1500 kg Determine the solidification time for a slab-shaped casting of 16 e thickness when iỘn withaut superheat is poured into the sand mold at an initial m temperature of 300 C BI U
Aluminum To illustrate the effect of ice on the aluminum cooling plate, consider the drawing shown here and the data that it contains. Ignore any limitations due to significant figures. Review lecture example for assistance (Cutnell 377) Ice -10.0 °C -25.0 °C (a) Calculate the heat per second per square meter that is conducted through the ice-aluminum combination. F.0050 m-- (b) Calculate the heat per second per square meter that would be conducted through the aluminum if the ice were not present. Notice how much larger the answer is in (b) as compared to (a). 0.0015 m
24 Hexane C,H is used for fuel in a CI engine at an air-fuel ratio AF = 25. Hexane has a specific gravity of 0.659 and a midpoint boiling temperature of 69 C. Calculate: (a) Equivalence ratio. (b) Lambda value. (c) Cetane index of hexane.
Mechanical Engineering Question
4 ) Every temperature measuring instrument makes use of specific physical property in order to measure temperature objectively . Which physical properties are used in thermocouple , PT sensors and mercury - in - glass thermometer ? Briefly describe each of this methods.
kindly help me with this problem Enumerate and explain each briefly the FOUR (4) Properties of the Bernoulli Process