Question

A pump is used to pump oil to a tank located 10-m high at room temperature....

A pump is used to pump oil to a tank located 10-m high at room temperature. The oil flow is laminar. Now, if the oil is pre-heated while the oil flowrate is maintained, discuss whether the pumping power of the pump will increase or decrease.

Engineering   Mechanical-Engineering   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Power of a pump depends on the 4 factors i.e. Density of fluid, height, flow rate, acceleration due to gravity.

Since, in the above case height, flow rate and acceleration due to gravity remains constant, therefore only variable is density of fluid.

When the oil is pre-heated its density decreases (density decreases with increase in temperature for liquids), if density decreases then power of pump also decreases because both are directly proportional to each other keeping all other terms constant.

pumping power of pump will decrease.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A 3-m-diameter tank is initially filled with water 2 m above the center of a sharp-edged...
A 3-m-diameter tank is initially filled with water 2 m above the center of a sharp-edged 10-cmdiameter orifice. The tank water surface is open to the atmosphere, and the orifice drains to the atmosphere through a 100-m-long pipe. The friction coefficient of the pipe can be taken to be 0.015 and the effect of the kinetic energy correction factor can be neglected. Someone suggests that it makes no difference whether the pump is located at the beginning or at the...
To use the sun, a parametric mirror is used to focus 1 m^2 of sunlight onto...
To use the sun, a parametric mirror is used to focus 1 m^2 of sunlight onto a well-insulated container that contains 5 liters of water at room temperature (20°C) and 1 atm of pressure. The mirror provides 1368 W of power while the sun is shining, which it provides on average 4.6 hours per day in New Hampshire (during other times the sun is too high or too low to hit the mirror). Note that the specific heat of steam...
1. Consider a 1.8-m high and 1.5 m-wide double-pane window consisting of two 4-mm thick layers...
1. Consider a 1.8-m high and 1.5 m-wide double-pane window consisting of two 4-mm thick layers of glass (k = 0.78 W/m°C) separated by a 10-mm wide stagnant air space (k = 0.026 W/m°C). The room is maintained at 20°C while the temperature of the outdoors is -10°C. Take the convective heat transfer coefficients on the inner and outer surfaces of the window to be 10 W/m2°C and 40 W/m2°C, respectively. Determine the steady rate of heat transfer through this...
Increasing the temperature of the heat addition (T subscript H) in any heat engine cycle, with...
Increasing the temperature of the heat addition (T subscript H) in any heat engine cycle, with keeping all other parameters unchanged: A. None of the answers. B. Decreases the heat added at high temperature. C. Increases the thermal efficiency of the cycle. D. Decreases the thermal efficiency of the cycle. 1 points    QUESTION 2 The maximum thermal efficiency of the Rankine cycle power plant is achieved when: A. it works on Carnot heat engine cycle. B. the pump work...
A grey body is one whose absorptivity 1. does not vary with temperature and wavelength of...
A grey body is one whose absorptivity 1. does not vary with temperature and wavelength of the incident ray 2. is equal to its emissivity 3. varies with temperature 4. varies with wavelength of the incident ray A liquid is in equilibrium with its vapor at its boiling point. On an average, the molecules in the liquid and gaseous phases have equal 1. potential energy. 2. kinetic energy. 3.temperature. 4. intermolecular forces of attraction. A liquid of density 1000 kg/m3...
What was the reason for the addition of H2O (10 ml), followed by gentle heating? Draw...
What was the reason for the addition of H2O (10 ml), followed by gentle heating? Draw a mechanism equation for the reaction taking place. Why was the water added slowly and through the condenser? Here is my experiment... Experimental procedure Warning: acetic anhydride is corrosive and a lachrymator. When carrying it across the lab, when it is inside a flask, please temporarily stopper the flask. Reaction Place salicylic acid (200 mg = 0.200g) into a dry 25ml round bottom flask...
Fueling Indonesians: Window of Opportunity or Regret? Kerosene is widely used as cooking fuel by Indonesian...
Fueling Indonesians: Window of Opportunity or Regret? Kerosene is widely used as cooking fuel by Indonesian households, with an annual usage of 10 million Kiloliters. It is a major subsidized fuel for household cooking, where its usage is over sixty percent of the 230 million population. The subsidy program costs the government heavily, where it amounts up to U.S.$4 billion a year. As the practice tends to bleed government expenditures quite heavily, the Indonesian government is embarking on a change...
Liebeck v. McDonalds Restaurants: The Original Coffee Product Liability Case James M. Dedman, IV Back in...
Liebeck v. McDonalds Restaurants: The Original Coffee Product Liability Case James M. Dedman, IV Back in 1994, Stella Liebeck v. McDonalds Restaurants became one of the most talked about lawsuits in American history. To this day, that New Mexico state court case is an essential component of any tort reform debate or discussion of litigation lore. At that time, and to this day, the thought of a fast food drive-thru customer spilling coffee on herself in her vehicle and later...
What tools could AA leaders have used to increase their awareness of internal and external issues?...
What tools could AA leaders have used to increase their awareness of internal and external issues? ???ALASKA AIRLINES: NAVIGATING CHANGE In the autumn of 2007, Alaska Airlines executives adjourned at the end of a long and stressful day in the midst of a multi-day strategic planning session. Most headed outside to relax, unwind and enjoy a bonfire on the shore of Semiahmoo Spit, outside the meeting venue in Blaine, a seaport town in northwest Washington state. Meanwhile, several members of...
Amazon CEO Jeff Bezos’ 2020 letter to shareholders details the company’s plans to combat the coronavirus...
Amazon CEO Jeff Bezos’ 2020 letter to shareholders details the company’s plans to combat the coronavirus Amazon CEO Jeff Bezos just published his annual letter to shareholders, and the efforts his company is taking to address the COVID-19 crisis were front and center. He outlined the company’s plans to build a lab to test employees and the social distancing measures its implemented in its facilities among other initiatives. Other than the coronavirus pandemic, Bezos also discussed the retail giant’s efforts...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT