2 m^3/min of a light oil are to be heated from 20C to 100C (with zero vaporization) in an exchanger using 250 kPa steam of 90% quality. The heat losses to the surrounding air have been estimated to be 5% of the heat transferred from the condensing steam to the oil. If the steam condensate leaves at its saturation point, what mass of steam perhour will be used in the exchanger? For light oil, Specific gravity= 0.88Specific heat= 2.00 kJ/kg-K

2 m^3/min of a light oil are to be heated from 20C to 100C (with zero vaporization) in an exchanger using 250 kPa steam of 90% quality. The heat losses to the surrounding air have been estimated to be 5% of the heat transferred from the condensing steam to the oil. If the steam condensate leaves at its saturation point, what mass of steam perhour will be used in the exchanger? For light oil, Specific gravity= 0.88Specific heat= 2.00 kJ/kg-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.

Chapter6: Forced Convection Over Exterior Surfaces

Section: Chapter Questions

Problem 6.12P

See similar textbooks

Similar questions

the question below is already answered in the photos that I provided I only want to ask how did it find the answersSaturated steam at a pressure of 25 psia is sprayed into a stream of moist air. The initial condition of the air is 55 dry-bulb temperature and 35 F de-point temperature. The mass rate of air flow is 2000 lb per min. Barometric pressure is 14.696 psia. Determine how much steam must be added in lb per min to produce a saturated air condition, b) the resulting temperature of the saturated air.my question here is:regarding of the solution pls elaborate how did it get w1 and h1 is it given in the psychrometric chart or it has a specific solution to follow
Evaporator, single effect is used to upgrade the concentrate 8000 kg/h of tomato juice than 5% solids the total to 30% solids total. Juice enters the Evaporator at 15 °C. The Evaporator is operated with Steam (quality 80%) in 143.27 kPa. The condition of vacuum in the Evaporator allow the juice to a boil on the 75 °C. The hot kind of material dilute is 4.1 kJ/(kg °C) and the product the concentrate is a 3.1 kJ/(kg °C). Count (a) the Rate of the needs of steam = kg/h. b. The economic steam if the temperature is condensate is released at 75 °C. = (kg water evaporated/kg of steam) Help me :-(
2. Two hundred and fifty pounds of a mixture of 10 mol% propane 20% n-butane, and 70% n-pentane is completely vaporized in a pipe still in one hour. At the outlet, the temperature anc 433 F and 600 psia. What is the volumetric flow pressure are rate in cfm at the outlet conditions? Answer: The physical properties of the gas are: Tc Pc MW Propane 369.9 K 665.8 R 42.0 atm 44 Butane 425.17 K 765.31 R 37.47 atm 58 Pentane 469.8 K 845.64 R 33.3 atm 72
QUESTION 2 A new induced raft cooling tower is circulating 120 000 L/h of water that is cooled from 50 °C to 22 °C. How much blow-down and make-up is required to maintain the concentration of dissolved solids in the circulating water at four times the concentration in the make-up water? Assume the following: - The evaporated water contains no dissolved solids so all solids entering the system in the make-up must be removed by blow-down and windage. - The windage value of the induced draft cooling tower is 0.3% for each 5.6 °C. - The evaporative losses value is 1.1%.
Design a hydrocooling unit to cool down fruits and vegetables from 30 °C to 5 °C in 20 minutes at a rate of 20,000 kg of fruit or vegetables/h. The design must fulfill the following requirements: The unit will be an immersion flooded system. It must be able to cool down and transport the products in chill water. The tank has the following dimensions approximate. three meters wide and up to 90 cm hight. The water will circulate and be cooled through the evaporation section of a refrigeration system. The refrigerant temperature inside the coils will be -2 °C, and the water temperature must not drop below 1 °C and must not exceed 6 °C. Assuming reasonable values for the average density, specific heat, and porosity of the product (the fraction of the volume of air in a box), recommend reasonable values for: The speed of the water through the canal, the capacity of the cooling system. the compressor power.
. A bomb calorimeter is used to determine the Higher Caloric Value of an oil sample . the mass of the sample is 2.12g. The total equivalent mass of water is 1.84kg. The increase in temperature after ignition is 8.9K . 2.9g of condensate is formed after it has cooled. Calculate the higher and lower calorific values. The specific heat of water is 4.186kJ/kgk.
A 20% (by wt) sodium hydroxide solution is being concentrated to 50% (by weight) using an evaporator at 311 K. The saturated steam used for heating is 399.3 K. The pressure in the vapor space of the evaporator is 13.3 kPa abs. If the overall heat transfer coefficient is 1420 W/m2-K and the area is 86.4 m2, calculate the feed rate of the evaporator.
Saturated steam at 10 bar pressure is supplied to increase the temperature of the feed natural gas from its inlet temperature of 30°C to within 15°C of the steam outlet temperature. All steam properties can be verified in the steam table, attached. Evaluate the mass flow rate of the steam supplied, if about 20% of the steam is still uncondensed at the exit. The relevant properties of Natural gas (NG) are as follows: NG Flow Rate = 1500 kMol/hour Average specific heat Capacity of NG = 40 kl/kMol.°C.
Physics Consider a tank full of gaseous propane at 25 ºC and 5 atm. The tank is accidentally damaged resulting in a 10-mm hole. Calculate the mass flow rate of propane through the hole (assume that the pressure in the tank remains at 5 atm and that the ambient is at atmospheric pressure). NB: the ratio of specific heats for propane is 1.15
Calculate how much energy (kJ) is required to heat a liter of water from 30°C to saturated liquid at normal boiling point. Using specific heat, calculate the change in internal energy (kJ) when 400 kmol of water at 150°C (1bar) is cooled at constant pressure until it reaches its saturated vapor condition and compare with value calculated from steam table.
CO2 gas enters the pipe at a flow rate of 2kg / s, 3MPa pressure and 500K temperature. While the CO2 flows in the pipe, it is cooled down at constant pressure and its temperature drops to 450 K at the pipe outlet.Condensation at the CO2 pipe outlet.Find the ideal gas using the equation.
sessfen O attempy 2. 6.1 Dry saturated steam is expanded in a steam nozzle from 1 MPa to 0.01 MPa. Calculate dryness fraction of steam at the exit and the heat drop. (0.79, 686 kJ/kg)