The surface of a horizontal. 7-mm-diameter cylinder is maintained at an excess temperature of 5°C in saturated water at 1 atm. Estimate the heat flux using an appropriate free convection correlation and compare your result to the boiling curve of Figure 10.4. Repeat the calculation for a horizontal. 7-
Want to see the full answer?
Check out a sample textbook solutionChapter 10 Solutions
Fundamentals of Heat and Mass Transfer
Additional Engineering Textbook Solutions
Applied Fluid Mechanics (7th Edition)
Mechanics of Materials (10th Edition)
Vector Mechanics for Engineers: Statics and Dynamics
Thinking Like an Engineer: An Active Learning Approach (3rd Edition)
Fox and McDonald's Introduction to Fluid Mechanics
Automotive Technology: Principles, Diagnosis, and Service (5th Edition)
- In boiling water at 1 atm pressure outside a stainless-steel tube with a surface temperature of 410F, the heat-transfer coefficient h in the absence of radiation is 32 Btu/h*ft^2*F. If the emissivity of the stainless steel is 0.8, will radiation significantly augment the rate of boiling (e.g., by more than 5 percent)? Assume that the vapor film is transparent to radiation and the boiling liquid is opaque.arrow_forwardPlease help me with the problem shown in the figure thanksarrow_forward1. Water at atmospheric pressure is to be boiled in polished copper pan. The diameter of the pan is 300 mm and is kept at 111°C. Calculate the following : () Power of the burner to maintain boiling; (i) Rate of evaporation in kg/h. Take the properties of water at 100°C as follows: P, = 958 kg/m"; p, = 0.597 kg/m²; µ,= 278 × 10ʻ kg/ms; c= 4216 JkgK; = 2257 kJ/kg ; Pr= 1.723, o = 58.9 x 10-³ N/m %3D [Ans. (1) 13.664 kW, (i) 21.8 kg/h]arrow_forward
- Saturated, pure steam at a temperature of 170 oC condenses on the outer surface of avertical tube of outer diameter 2 cm and length 1.5 m. The tube surface is maintained at auniform temperature of 150 oC.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.arrow_forwardWater at atmospheric pressure is boiled in a container using a horizontal 8 mm electric wire (ε=0.9) whose temperature is maintained by an electric current at 250oC. Estimate the boiling heat transfer coefficient between the water and the wire surface. Properties of Water, liquid: ρl = 957.9 kg/m3, hfg = 2257 kJ/kg, vapor: ρv = 4.8 kg/m3, Cp,v = 2560 J/kg.K, μv = 14.85*10-6 N.s/m2, kv=0.0331 W/mK. Select one: a. 247 W/m2K b. 440 W/m2K c. 90.7 W/m2K d. 710 W/m2Karrow_forwardAn aluminum-alloy rod has a length of 9.9269 cm at 30.00°C and a length of 9.9686 cm at the boiling point of water. (a) What is the length of the rod at the freezing point of water? (b) What is the temperature if the length of the rod is 9.9324 cm? (a) Number (b) Number i Units Unitsarrow_forward
- can you answer the questionarrow_forward.All properties should be evaluated at the temperature of the steam.Saturated, pure steam at 65 ºC condenses on the surface of a vertical tube with outersurface diameter 2 cm which is maintained at a uniform temperature of 35 ºC. Determinethe tube length for a condensate flow rate of 5 x 10-3 kg/s.arrow_forwardneed soon all parts don't copy I will downvotearrow_forward
- There is a long rod, insulated to avoid any heat loss on its sides, is in perfect thermal contact with the boiling water (at atm pressure) at of the one end and with the ice-water mixture. The rod has a 1.00 m section of copper (with one end in boiling water) connected and joined together end-to-end to a length, L2, of steel (with one end in the ice water). Both sections of the rod have cross-sectional areas = 4.00 cm2. The temperature of the copper-steel junction is 65.0 °C after a steady state has been met. How much heat per second flows from the boiling water to the ice-water mixture? kCopper = 380 W/m*K kStainless Steel = 50 W/m*K A. How much heat per sec (watts) flows from boiling water to ice water mixture? B. Find the length L2 of steel section in metersarrow_forwardA copper rod, an aluminum rod, and a brass, each 6.00 m length and 1.00 cm diameter, are placed end to end with the aluminum rod between the other two. The free end of the copper rod is maintained at water’s boiling point, and the free end of the brass rod is maintained at water’s freezing point. If T1 and T2 are steady-state temperature copper-aluminum junction and aluminum-brass junction respectively. Where TC is temp at freezing point of water and TH is temp at boiling point of water. Show that the steady-state temperature for (a) the aluminum-brass junction is:arrow_forwardExplain the cooling effect of evaporation in terms of latent heat of vaporization.arrow_forward
- Principles of Heat Transfer (Activate Learning wi...Mechanical EngineeringISBN:9781305387102Author:Kreith, Frank; Manglik, Raj M.Publisher:Cengage Learning