Mass flow rate of hot fluid is 0.007 kg/s. Convection heat transfer coefficient of hot fluid stream is 1000 W/m?°C. Thermophysical properties are given as follows. Hot fluid; c, = 5000 J/kg.°C Water; dynamic viscosity, u = 0.001 Pas; Prandtl number, Pr = 6.14; thermal conductivity, k = 0.607 W/m.°C; density, p = 1000 kg/m2; specific heat c, = 4200 J/kg.°C. Neglecting conduction resistance of the pipe, calculate heat exchanger effectiveness (ɛ), heat transfer rate (Q in J/s), outlet temperatures of the hot fluid (Thout) and water (Tw.out) for varying mass flow rate values of water provided below.

Mass flow rate of hot fluid is 0.007 kg/s. Convection heat transfer coefficient of hot fluid stream is 1000 W/m?°C. Thermophysical properties are given as follows. Hot fluid; c, = 5000 J/kg.°C Water; dynamic viscosity, u = 0.001 Pas; Prandtl number, Pr = 6.14; thermal conductivity, k = 0.607 W/m.°C; density, p = 1000 kg/m2; specific heat c, = 4200 J/kg.°C. Neglecting conduction resistance of the pipe, calculate heat exchanger effectiveness (ɛ), heat transfer rate (Q in J/s), outlet temperatures of the hot fluid (Thout) and water (Tw.out) for varying mass flow rate values of water provided below.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

%AY |I1, 76% fTV s INTV Uo 10:21 یلیجرام 2.pdf Q1 1. How can recognize an extensive or intensive properties such as density, colour of gold, Volume of water in a graduated cylinder. 2. Drive the relation 1-x = Vavg - 3. A glycerin pump is powered by a 5-kW electric motor. The pressure differential between the outlet and the inlet of the pump at full load is measured to be 211 kPa. If the flow rate through the pump is 18 L/s and the changes in elevation and the flow velocity across the pump are negligible, the overall efficiency of the pump is (a) 69 percent (b) 72 percent (c) 76 percent (d) 79 percent (e) 82 percent. Q2 1. While solving a problem, a person ended up with the following equation at some stage: E 25 kJ +7 kJ/kg where E is the total energy and has the unit of kilojoules. Determine how to correct the error and discuss what may have caused it. 2. Define isolated system, specific gravity and thermal equilibrium. 3. Initially P-400 kPa and T-400 °C, as shown in FigQ2-1. What is…
A gas having a viscosity of 2.04 x10° kg/ms, the thermal conductivity of 0.0293 W/m °C, undergoes an isobaric non-flow heating process at a pressure of „P“ (= 95 × Reg. No.) kPa and temperature changes from 22 °C to „T“ (= 25 + Reg. No.) °C. The specific heat of the fluid is dependent on temperature and is given as C, = 1.44+82/(T+48); where T is in Celcius. During this process, its volume changes from 0.28 m/kg to 0.658 m³/kg. Sketch a schematic of the system along with the chosen system boundary and indicate the directions of various energy/mass flows. b. Show the process on the Pv diagram. Determine the amount of heat transfer during the process. d. Estimate the work done during the process. а. с. е. Calculate the changes in internal energy and enthalpy of the system.
55°C methanol flows over a 4m long 2m width flat plate with temperature of 25 C. The velocity of methanol is 1.08 km/h. Determine the total drag force and the rate of heat transfer from the entire plate. What is the value of x_ and what does it mean?
300°C steam flows in a stainless-steel (ss.) pipe with thermal conductivity of 50 W/m.K. The pipe has internal diameter (ID) of 40 cm, and outer diameter (OD) of 42 cm. The pipe is placed in another ss. pipe with ID and OD 44 cm and 44.2 cm, respectively. The gap between the pipes is filled with steel air (use air properties at 160°C from appendix). The convection heat transfer coefficient at the inner and the outer surfaces of the pipe is hi = 40 W/m2. K and h2= 15 W/m?. K. Determine the rate of heat loss if the length of the pipe %3! is 10 m. Also determine the temperature at inside, intermediate and outer surfaces.
Q2 a) Consider the wing of an aircraft as a flat plate of 25 m length in the flow direction (Figure 2). The plane is moving at 100 m/s in air that is at a pressure of 0.7 bar and a temperature of 10°C. The top surface of the wing absorbs solar radiation at a rate of 800 W/m2. Assume the wing to be of solid construction and to have a single, uniform temperature. Estimate the steady-state temperature of the wing. Refer Table A-15 for air thermophysical properties. Air a conv 9's,abs = 800 W/m² Į U= 100 km/s Too=263 K p= 0.7 bar a conv tam Figure 2 - Ts L = 2.5m
The heat flux for stable film boiling on the outside of a horizontal cylinder or sphere of diameter D, in m, is given below. What should be the value of "n", for the equation above to be dimensionally consistent? Use dimensional analysis: q=heat flux, W m² W k = thermal conductivity of vapor, 'm °C hgf - [g kỷ Pv(P₁ − Pv)[hfg + 0.4 Cpv (Ts − Tsat)]] à = Cf MyD (Ts - Tsat) Pv = density of vapor, P₁ = density of liquid,- kg m³ kg 'm³ Cpv = enthalpy of vaporization, kg g = gravitatioinal acceleration, C = experimental constant, dimensionless m J kg °C Ts = surface temperature of the heater, °C Tsat = saturation temperature of vapor, °C kg Hv = viscosity of vapor, ms = specific hear of vapor, (Ts - Tsat)
Topic: Heat transfer Completely solve and box the final answer. 6. Water flows at 5m/s is passed through a tube of 2.5 cm diameter, it is found to be heated from 20degC to 60degC. The heating is achieved by condensing steam on the surface of the tube and subsequently the surface temperature of the tube is maintained at 90degC. Water properties are as follows: density=995kg/m3, kinematic viscosity=.657x10-6 m2/s, Pr=4.43, k=.628W/mK, cp=4178J/kgK. What is the heat absorbed by the water?
Saturated liquid ammonia is entering a 50 cm diameter 10-m long pipe at a steady 0.1 kg/s mass flow rate and a mean temperature of 0°C. It is exiting the pipe as saturated vapor at a mean temperature of 0°C. (a) What is the Reynolds number and flow regime at the beginning and at the end of the pipe? (b) If the surface temperature of the pipe can be assumed to be constant at 15°C in this section, what is the average convection coefficient of the ammonia flow? (a) 1343; 27075 (b) 553.6 W/m2K
%A7 36 l 36.ll T'UI T'UIltu CulIvtcioII Ovti a llai plalt uut iU NOW Palaliti LU the plate: a) Laminar Flow: 0.664RE/2Pr/3 Nu = a) Turbulent Flow: Nu = 0.037Re*/5Pr/3 Numerical Exercise 1. A flat plate is supplied with a constant heat flux of 100 [W/m²] from bottom. The plate has 0.5m2 area and is kept in a room with ambient temperature 20°C. If it has a steady state temperature of 32°C what is the heat transfer coefficient? Ta = 293[K] ģ = h(T, – Ta) Tp = 305[K] ģ = 100 [W /m²] Numerical Exercise 2. The air has the following properties at 27C: Density [kg.m-3], Dynamic Viscosity Heat capacity, Cp = 1.005 [kJ.kg-1.K-']. If the thermal conductivity of air at that temperature is 1= 0.026 [W.m-'.K-'], what is the average Nusselt Number over a flat plate of dimension 10 cm X 10 cm when air is flowing parallel to its surface with a speed 1 [ms]? 1.18 1.85X10-5 [kg.m-l.s-l], Specific PVLC Re = V = 1 [m/s] pCp Pr = Lc 0.1 [m] 1 1 Nu = 0.664RežPr3
Why do vapor bubbles get larger in boiling water as they approach the surface? Type your detailed answer on Canvas using thermal concepts. BIUA A-IEE 33I X x, EE 2 V TT 12pt • Paragraph esc & %23 %$4 4 5 1 S F LE !! e
Saturated steam at 99.6 °C is heated to 350°C. Use the steam table provided to determine: a. The required heat input if 1 kg of steam undergoes the process in a variable-volume constant-pressure container. b. The work of expansion (in kJ) of the steam undergoing the process. C. The required heat input if a continuous stream flowing at 1 kg/s undergoes the process at constant pressure. d. Does your numeric answer to part c equal the sum of parts b and a? Explain why or why not. Given: 1 bar = 10 N/m4, Q= AH, Q = AU, AA = AÛ + PAV, table B.7 in kJ/kg and m/kg.
When The process is accorcing to a law iso thermal. takes place in a perfectly thermally b. C. insulated Cylinder. 8=1.3 Ans.[ 270 i 5.138 1g1.713 1J,52.6i,sSiky.-5.51, 219 5251g, o leg] University of Anbar College of Engineering Mechantont Englning Dpartment Year (Sophomore year) THERMODYNAMICSA Lec. No. Date: / 202 ME2303 Instructor: Asst. Prof. Dr. Saad M. Jalil hr Page Na. Q7 225 1g Ih of air at 4o% enter amixing chamber where it mixes with 540 kg /h of air at isi. Calculate the temperature of the air leaving the Chamber. assuming steady flow conditions. A ssume that the heat loss is negligible . Ans [22.4c] Q8: Aquantity of gas occupying o14n at a pressure of 1.4MNIM? and temperature of 300 č is expanded adiabatirally to 280 K Nimi Cv = 0. 74 Kg 11eg K p=1o41g ng - detennine: a. the mass of gas b. the temperature of the gas after expansion. work done during the expansion. Ans-fa-1.14 kg C. the b. ४३१ C. 180 lT ) Internal mC,(T2-T1) mC,(T2-T