Answer / totti

main difference b/w horizontal and vertical heat exchanger
is "residence time" fluid which flow in horizontal heat
exchanger gets more residence time as compared to vertical
heat exchanger.

Answer / sandeep singh

construction wise both r same but functionally they differ.vertical is mainly used when less floor area availible.and vertical required higher pumping cost also good for handling heat sensible material as resident time is much lower in comparision to the horizontal one.

Answer / daya gamane

In vertical heat exchanger film-wise condensation occurs while in horizontal heat exchanger drop wise condensation occur

Answer / ossus

1.Thermosyphon type HE is vertical HE and Kettle type HE is horizontal HE.

2.in horizontal position, pressure drop is negligible and in vertical position,pressure drop is significant and high.

3. If viscosity of bottom product of distillation column is very high then vertical position preferred and if low then horizontal position preferred.

4 in vertical position high circulation of fluid of possible and low circulation in horizontal position.

Answer / vishwarup sane

1. As the tubes are smooth, the condensation occurs on the surface of tubes, which makes the film over the surface of tubes leads to increase in thickness, as the thickness increases it's acts as a insulation and lower the effective heat transfer coefficient.
2. In vertical heat exchangers as we go downward the thickness of the film increases resulting lowers the heat transfer coefficient.
3. In horizontal heat exchanger the formation of film on the surface of tubes is there but the not as that much of vertical heat exchanger, so the heat transfer coefficient is higher in horizontal type heat exchanger than vertical type heat exchanger.

Answer / yousef

the vertical is better than horizontal when using steam as service side

Answer / magesh

Both are the same. Only the way it is erected. Normally HXs are placed horizontally. But in case of space constraints they can be erected vertically. In such a case other changes like the head of pump pumping fluid to the vertical HX may change.

Answer / muthu

same

Answer / nagarajan

both are same only difference is the flow of the fluids us
ed in H.E

Answer / shravan kumar

if an exchanger is placed horizontally then it is called
horizontal heat echanger. Simillarly of vertical heat
exchanger.

Question 58 – In the design of a solar power system steps of calculations below are followed : (a) The power output of the inverter of the of the solar panel is 100 watts. What is the power input, Pin to the inverter when the efficiency of the inverter is 50 %? (b) If the rated power of the inverter is 300 watts, how many inverter is needed for the solar panel? (c) Charge controller of V = 12 volts is used to supply power to the inverter. What is the input current I to the inverter? (d) If the charge controller capacity is 10 A, how many charge controllers are needed? (e) If a biochemical mixer consumes 100 watts, running for 2 hours per day, what is the energy consumption in kilowatt hour per day? (f) What is the input energy needed when the efficiency of the inverter is 50 %? (g) If your area receives 2.88 hours of full sunlight per day, how much energy, in kilowatt hour can be produced per day when one solar panel can produce 20 watts of power? (h) If you know that you have to produce total energy as the answer for (f), how many solar panels are needed? (i) Each V = 12 V battery has 5 ampere hours. If the total energy needed is in answer (f), then how many batteries are needed to run the biochemical mixer if without sunlight for 3 days?

1 Answers  

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0 Answers  

SSR meanig

1 Answers  

pls send me HPCL & reliance test paper for chemical engineering.....

4 Answers   BCPL, HPCL, NOCL, Reliance,

What are some common problems associated with dense phase pneumatic conveying?

0 Answers  

Explain how can viscosity affect the design of a mixer?

0 Answers  

CHEMICAL MATERIAL BALANCE - EXAMPLE 2.5 : In a non-dilute absorber, the inlet gas stream consists of 8 mol % carbon dioxide in nitrogen. By contact with room temperature water at atmospheric pressure, 65 % of the carbon dioxide from a gas stream has been removed. (a) Find the mole ratio of carbon dioxide and nitrogen gases at inlet and outlet gas streams. (b) The Henry's Law provides y = 1640 x for carbon dioxide in water. Find the mole ratio when x = 0.0000427. Mole ratio is y / (1 - y) for y.

1 Answers  

BIOPROCESS ENGINEERING - EXAMPLE 14.1 : In differential centrifugation of cells with diameter D in centimeter, the square of D is given by D x D = [18n ln (RF / RI) ] / [ (RP - RFF) Wt ] where n is the fluid viscosity (poise), RF is the final radius of rotation (cm), RI is the initial radius of rotation (cm), RP is cell density (g / ml), RFF is the fluid density (g/ml), W the square for the rotational velocity in (radians / s) (radians / s), t is the time required to sediment from RI to RF (s). Derive an equation for W as a function for D, n, RF, RI, RP, RFF and t, with the stated units above, in radian & degree.

1 Answers  

CHEMICAL ENERGY BALANCE - EXAMPLE 11.3 : For liquid benzene, the CP constants are : a = 129440, b = - 169.5, c = 0.64781. Reference temperature is 298 K. The temperature of benzene is 60 degree Celsius. Calculate the enthalpy of benzene by using the formula H = a (DT) + (b/2) (T^2 - TREF^2) + (c/3) (T^3 - TREF^3) where ^ is power, DT is temperature difference with TREF = 298 K. H is in J / kmol. DT = T - TREF.

1 Answers  

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0 Answers  

When should one be concerned with the tube wall temperature on the cooling waterside of a shell and tube exchanger?

0 Answers  

Are there any special considerations to be taken into account for combusting ammonia?

0 Answers