The following observations were recorded during a boiler trial of 1 hr duration. 700 kg of coal of calorific value 30,000 kJ/kg is used to produce 5,250 kg of steam at a pressure of 12 bar. Dryness fraction of steam is 94%. Temperature of steam leaving the superheater is 250°C and temperature of hot well is 45°C. Calculate: (i) Equivalent evaporation. (ii) Thermal efficiency of boiler.
Q: E3. Suppose a mass-spring system is described by the ODE u"+9u = 0 with initial conditions u(0) = -1...
A:
Q: Two geocentric elliptical orbits have common apse lines and their perigees are on the same side of t...
A:
Q: PROBLEM #3: Distillation is the process of separating components of a liquid solution from each othe...
A: Given data: Ethanol is cooled in a cooling tower at 78°C Cooling water is used
Q: 8. Water at 25°C is flowing through a 1.0 km long Gl pipe of 200 mm diameter at the rate of 0.07 m/s...
A: Given data, Water temperature T=25+273=298 K Pipe length L=1000 m Pipe diameter D=200 m=200×10-3 m F...
Q: (a) The mean ultimate tensile strength of a steel is 1500 MPa. What value should be used if the desi...
A: Note: As per the policy of the company, answer for one question is provided here. You can repost oth...
Q: The velocity components are given by in the following case u = x' + y + z, v = -xy- yz - x Find the ...
A:
Q: A 40 kg-mass hangs from the end of a uniform beam. The beam is 6.0 m long and has a mass of 60 kg. T...
A:
Q: The velocity components for a three dimensional incornpressible flow is given by : u=x'-y-2x, v=y'-z...
A:
Q: How is the Eulerian description of fluid motion differ from the Lagrangian description? (select all ...
A: To study the motion of the fluid in fluid science, the various approaches used are: Eulerian approa...
Q: A barge is pulled by two tugboats. If the tension force in the rope TAB and TBC is 3500 Ibs and 2500...
A: Given:TAB=3500 lbTBC=2500 lb
Q: Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be u...
A: Answer: The maximum altitude is 11906 ft.
Q: (17 blanks) Calculate the efficiency of the Carnot Engine for ideal gas. Consider the figure below f...
A: Given DataCarnot cyclevfor Ideal gasad>ab>bc>cd
Q: A 500-g collar can slide without friction along the semicircular rod BCD. The spring is of constant ...
A:
Q: I. For the truss below, compute for the support reactions. (Note that loads are perpendicular with t...
A: A truss could be a structure that consists of members organized into connected triangles so the gene...
Q: Starting at the island of Moi in an unknown archipelago, a fishing boat makes a round trip with two ...
A:
Q: A metallic rod of 500 mm length and 50 mm diameter, when subjected to a tensile force of 100 kN at t...
A:
Q: & Sharpe gears är ne differential indexing formula, calculate the indexing for the following: EROWN ...
A: Given, Simple indexing Gear ratio 40:1 Number of divisions(N) =35 40 revolution of crank=1 revolut...
Q: 1. a) Write a note on evolution of refrigerants. b) Discuss the modern day refrigerants that are be...
A:
Q: 500 5. Calculate the resultant of the force system, and express it as a force and a couple moment wi...
A:
Q: find the ualume f 8ig below? R- s:de veiw beil ら
A:
Q: 1. A saturated water vapor is in a tank with a volume of 2.5 ft. It has a pressure at 25 psia. Due t...
A: Given dataV=2.5ft3P=25PsiaT=75°F ***As per our company policy we are supposed to do only 3 subparts ...
Q: cm ỏ i 2 3 4 5 6 7 8 9 10 Main Scale Vernier Scale 1. The diameter of a certain circular shaft manuf...
A: Smallest division of main scale =0.1 cm Number of division in vernier scale =10 Least count = Smal...
Q: From the figure shown, Material 1 (brown) is enclosed inside Material 2 (grey). If there would be a ...
A: Given:P=357.5 KND=88.75 mmμ=0.355E=88.56*109 Pa
Q: A stepped 100 N-m as shown in figure below. Modulus of rigidity of material is 90 GPa, then angle of...
A: Given data: Torque, T=100 N-m G=90 GPa
Q: A Carnot device operates between a cold reservoir of temperature 173 K and a hot reservoir of temper...
A: “Since you have asked multiple question, we will solve the first question for you. If you want any s...
Q: Calculate Stresses at (x,y.z) (O in, 0.5 in, 0 in). You do NOT need to show Shear and Moment Diagram...
A: Given data: Diameter = 1 inch Length = 10 inch FX = 1 lbFY = 10 lbPZ = 1 lb TX = 1 lb-inStresses are...
Q: A steam generator comprises a boiler, a superheater, an economizer, and an air preheater. The feedwa...
A: here temperature initial is given 140 C and final is given 450 C the specific heat of air is given ...
Q: 11. Which one of the following aero highest propulsive efficiency? (a) Turbojet engine without after...
A: Propulsive efficiency is the ratio of the useful propulsive energy to total fuel energy. where wh...
Q: Figure shows the schematic representation for the measurement of velocity of air (density= 1.2 kg/m³...
A: Given data: ρair=1.2 kg/m3ρw=1000 kg/m3g=9.8 m/s2x=10 cm Need to determine the velocity.
Q: Question: Starting from rest, the cable can be wound onto the drum of the motor at a rate of VA=(3t2...
A: Given: Va=3t2 m/sLeft distance=9 m
Q: ylindrical rods can also be treated as being infinitely long when finding temperatures near the bott...
A: so we have to determine if it is appropriate to use cylindrical rod as as infinite long when we need...
Q: A shaft with an allowable shear stress of 102 MPa is subjected to a bending moment of 3,159 N-m and ...
A:
Q: heat rejected per cycle is
A: Given; A cycle heat engine does , Efficiency, η=60%=0.6Work per cycle, W=60kJ From the given questio...
Q: Q3: You have a truss which is shown below, two forces applying on it in B and C joints, which are (1...
A:
Q: Ratio of solidification time of a cylindrical casting (height = radius) to the cubic casting of side...
A:
Q: Para a estrutura abaixo indique: a) Qual é a tensão no cabo BE? Considere P=792,1 kN. (Indique a re...
A:
Q: Fig 2 40 20 4o 40 120
A:
Q: For hole size 250.0 firs with pin size 25 *0.05 the +0.05 fitting has minimum clearance of (in mm) +...
A: Given:Base size=25 mm
Q: 6.20 Satellites A and B are in the same circular orbit of radius r. B is 180° ahead of A. Calculate ...
A: Find semi -major axis
Q: Consider a hemispherical tank that is completely filled with water. The water exits the tank from th...
A:
Q: 1. Determine Z and V for steam (H20) at 250 °C (523.15 K) and 1800 kPa by the following: (a) Ideal g...
A: *As per our guidelines we are supposed to answer first three sub-parts of the question. Kindly repos...
Q: Determine the equivalent spring constant of the system where the spring will be located in the posit...
A:
Q: What downward acceleration should be applied to a tank containing a certain liquid such that the pre...
A: When dealing with the pressures exerted by gases and liquids, however, it is most convenient to a...
Q: 7.51 • A system of two paint buck- ets connected by a lightweight rope is released from rest with th...
A: Given Mass of rope, M = 12 kg Height, hf = 2 m Find Speed, v
Q: 7. Calculate the resultant of the force and couple system shown. Express your answer as a single for...
A:
Q: Oil flows through a 200 mm diameter horizontal cast iron pipe (friction factor f=0.0225) of length 5...
A:
Q: Find the available of
A: Given; A steel billet of;Mass, m=1800 kgIt is cooled from; = 1100 K to 450 KOR, ∆T=1100-450Ambient t...
Q: Heat transfer through the walls can be considered as steady under the assumption that the highest te...
A: Given :- Heat transfer through the walls can be considered as steady under the assumption that the ...
Q: [40] Problem 1: A bearing supports a 28mm diameter solid steel torsion rod (plan view shown in Fig. ...
A: Diameter = 28 mm Arm= 300 mm Vertical load =2500N To find. Total stress
Q: A spherical balloon is filled with 6 kg of hydrogen gas (H2) at 2 bar and 20 °C. Which nearly gives ...
A:
Step by step
Solved in 2 steps with 2 images
- AH of vaporization of water is 439.2 cal/g at the normal boing point. Since virus can survive at 404.39 K by forming spores. Most virus spores die at 851.9 K. Hence, autoclaves used to sterilize medical and laboratory instruments are pressurized to raise the boiling point of water to 851.9 K. Find out at what InP (torr) does water boil at 851.9 K? O a. 8460.435 O b. 940.048 c. 1880.097 O d. 2.4744. GoBrownsite is an obscure element with a molar mass of 126.2 grams per mol. Below is the cooling curve for GoBrownsite. How much energy needs to be removed from a 250.0 g sample of GoBrownsite knowing the following. Heat of Condensation AH = -165 kJ/°C • Specific heat of liquid GoBrownsite = 197 kJ/g-°C Heat of Freezing AH = - 231 kJ/°C Cooling Curve 80 e) to (1) 60 40 20 -20 Temperature 40 -60 -80 -100 (1) to (s) -120 TimeHeat-Transfer Coefficient in Single-Effect Evaporator. A feed of 4535 kg/h of a 2.0 wt % salt solution at 311 K enters continuously a single-effect evaporator and is being concentrated to 3.0%. The evaporation is at atmospheric pressure and the area of the evaporator is 69.7 m². Saturated steam at 383.2 K is supplied for heating. Since the solution is dilute, it can be assumed to have the same boiling point as water. The heat capacity of the feed can be taken as cp = 4.10 kJ/kg · K. Calculate the amounts of vapor and liquid product and the overall heat-transfer coefficient U. 8.4-1.
- 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 72A feed of 4535 kg/h of a 2.0-wt % salt solution at 311K enters continuously in a single effect evaporator and is being concentrated to 3.0 %. The evaporation is at atmospheric pressure and the area of the evaporator is 69.7 m2. Saturated steam at 383.2 K is supplied for the heating. Since the solution is dilute, it can be assumed to have the same boiling point of water. The heat capacity of the feed can be taken as cP = 4.10 kJ/kg-K. Calculate the amounts of vapor and liquid product and the overall heat transfer coefficient U. Solution:1. Use the Solute Balance to calculate for the liquid product L 2. Use the overall mass balance to calculate for the vapor product V 3. Calculate for the enthalpy of the feed hF and the enthalpy of the liquid product hL using the h = CPdT. Use a datum temperature T = ____________. 4. Get the enthalpy of the vapor product from the steam table at T = ___________ and the latent heat of condensation of steam at P = ____________ and T = ____________. 5. Using…2. Find: a. hof steam at saturation pressure of 0.015 MPa and temperature of 800 K b. v of subcooled liquid at saturation pressure of 1.44 MPa and temperature of 17.5°C Use the sample table as reference for your solution in number 2 Sample, find the enthalpy of superheated steam at 1.45 MPa and 515°C. Option 1. Identify the value of the blue ones for the first 2 interpolations. Option 2. Identify the value of the green ones for the first 2 interpolations. 1.4 hs00°C,1.4MP h515°C1.4MPa. H520°C.1.4MPa. Saturation Pressure (MPa) 1.45 h500°C.1.45MP h515°C,1,45MP h520°C.1.45MPa. 1.5 hs00°C,1.5MP H515°C,1. 5MPa h520°C.1.5MPa 500 Temperature °C 515 520
- A feed of 4535 kg/h of a 2% salt solution at 311 k enters continuously a single effect evaporator and is being concentrated to 3%. The evaporation is at atmospheric pressure and the area of the evaporator is 69.7 m2. Saturated steam at 383.2 K is supplied for heating. Since the solution is dilute, it can be assumed to have the same boiling point as water. The heat capacity of the feed can be taken as Cp = 4.10 Kj/kg – K. Calculate the over – all heat transfer coefficient.Question 3 This question requires the use of the steam property tables (Rogers and Mayhew) uploaded on QM+ exam section. All properties should be evaluated at the temperature of the steam. Saturated, pure steam at a temperature of 170 °C condenses on the outer surface of a vertical tube of outer diameter 2 cm and length 1.5 m. The tube surface is maintained at a uniform temperature of 150 °C. Calculate: a) the local film condensation heat-transfer coefficient at the bottom of the tube. b) the average condensation heat-transfer coefficient over the entire length of the tube. c) the total condensation rate at the tube surface.in a surface condenser the pressure of steam is Q12 bar. The rote of cooling water flow is 40 kgAg of steam condensed Condensate teaves at 44°C and dhe rise in termperature of circuiating water is 13°C Determine the dryness fraction of steam entering the condenser.
- . 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.An evaporator is concentrating F kg/hr at 311K of a 20 wt % solution of NaOH to 50%. The saturated steam used for heating is at 399.3 K. The pressure in the vapor space of the evaporator is 13.3 kPa abs. The overall coefficient is 1420 W/. K and the area is 86.4 square meters. Calculate the feed rate F of the evaporator.Date: 1 of 1 PROBLEM 6.18 Air at 90°C and 1.00 atm (absolute) contains 10.0 mole% water. A continuous stream of this air enters a compressor-condenser, in which the temperature is lowered to 15.6°C and the pressure is raised to 3.00 atm. The air leaving the condenser is then heated isobarically to 100°C. Calculate the fraction of water that is condensed from the air, the relative humidity of the air at 100°C, and the ratio m outlet air @ 100°C /m feed air @ 90°C. Solution Basis: 1 mol feed. Since the problem statement asks us to calculate the ratio of the volumes of feed air and exit air, we will label both volumes on the flowchart. DA = dry air Compressor Heater V1 (m³) V2 (m³) П2 (mol) n2 (mol) V2 (mol H20(v)/mol) (1-y2) (mol DA/mol) 15.6°C, 3 a 1 mol 0.100 mol H2O(v)/mol 0.900 mol DA/mol 90°C, 1 atm V2 (1-y2) 100 C, 3 atm N3 [mol H2O(1)] 15.6°C, 3 atm DEGREE-OF-FREEDOM ANALYSIS ON COMPRESSOR UNKNOWNS AND INFORMATION JUSTIFICATION/CONCLUSION 4 unknowns (V1, n1, n2, y2) 2 balances 1…