estimate the diffusive heat flux through a column of water 1 m^2 with a thermocline extending from 922 m to 3657 m. Temp at 922= 5.4 degrees celcius, temp at 3657= 1.6 degrees celcius. K=10^-4, w=10^-7
estimate the diffusive heat flux through a column of water 1 m^2 with a thermocline extending...
a) if heat flux is changed from 20 to 200 W/m2 what is the Tm
out in degrees C? Assume same fluid properties
b) if heat flux is changed from 20 to 60 W/m2, and length is
changed to 20m from 30, what is the Tm out in degrees C?
SCHEMATIC: dacan W/m Water m = 450 kg/h Trn,,-27 oC x m m,o →xLTube. O L=30 m ASSUMPTIONS: (1) Steady-state conditions, (2) Constant properties, (3) Incompressible liquid with negligible viscous...
Question: 1 What is the maximum heat flux (Critical Heat Flux) for HFE-7000 according to Kutateladze's maximum heat flux correlation, in W/m2? Use the Zuber Constant (pi/24) for C. Question: 2 What was the minimum heat flux data point (Leiden frost Point) at the bottom of the film-boiling region of Nukiyama's experiment, in W/m2? Can you expect a similar value in our experiment? Question: 3 Estimate the excess temperature at CHF for HFE-7000 using the Rohsenow equation and the results...
Question 2 0 out of 4 points The heat flux through an infinitely long cable at time t is given by dT dx ctivity function of the cable. T0 is the temperature protile and t)is the heat dissipation as a where k(x) Ois the heat condu function of time. Consider the flux equation where/(0=exp (卅nanak A student measures the temperature at points x-(1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.o) in length units during a lab experiment and records the...
Question 2. Estimate the heat flux as well as con- Boiling& Condensation Correlations vection ooefickent for the bottom of a pot of boiling Nucleate Pool Boiling. Between onset of riucleate water if the surface in contact with the water appears boiing (ONB) and the critical to be at 382 K. C, 0.0080. The properties of wa- all properties at T, ter at punl.-96.8 kPa are: Tsae = 371.8 K; hfg 2260 kJ/kg: pe0.5568 kg/m p 959 kg/m ç = 0.05915...
system, hot water at an average temperature of 80°C is flowing through a 15-m section of a cast In a heating iron pipe (k 50 W/m K) whose inner and outer diameters are 4 cm and 5 cm, respectively. The outer surface of the pipe, whose emissivity is 0.75, is exposed to the cold air at 10°C in the basement. with a heat transfer coefficient of 15 W/m2.K. The heat transfer coefficient at the inner surface of the pipe is...
Heat flux through wood board = 150 W/m² for temperature difference of 25°C between the two surfaces as shown below. Find thermal conductivity of wood. T(x) T: 1. 2 cm
3 (c) Determine the Heat Flux through iron plate 900 mm thick whose one face is maintained at 190'c and other face at 20°c. Take thermal conductivity of iron K=215 w/m k (1 Marks)
Consider liquid water flowing over a flat plate of length L = 1 m. The water has the following properties: ρ-1000 kg/m3, Cp-4000 J/kgK. 10 3 kg/ ms, k 0.6 W/m . C μ Midway through the plate at x = 0.5 m, you measure a heat flux to the surface of: 05 m 3181 W/m2 You also measure an average heat flux to the surface over the length of the plate of: "4500 W/m2 Knowing the latter, and knowing...
In this problem you will estimate the heat lost by a typical house, assuming that the temperature inside is T(in) = 20 degrees celcius and the temperature outside is T(out) = 0 degrees celcius. The walls have fiberglass insulation, which dominates the heat conduction properties of the wall So we can consider the wall to have a thermal conductivity of k(wall) = 0.048 W/m/K . We will take the thickness of the walls and ceiling to be L(wall) = 12...
A water heater consists of a copper tube that carries water through hot gas in a furnace, as shown in Fig. 1. hot gas at T, = 500° th=0.033 inch h, = 25 W/m2K Poytube = 0.25 inch water at Tv = 30° h = 500 W/m2K kube= 300 W/m-K Figure 1: Copper tube in a water heater. The copper tube has an outer radius, ro,tube = 0.25 inch and a tube wall thickness of th=0.033 inch. The conductivity of...