Steam used to sterilize fermentation equipment is piped 20 m from a factory boiler room through...

Steam used to sterilize fermentation equipment is piped 20 m from a factory boiler room through a 6-cm-diameter tube. The surface temperature of the steam pipe is roughly constant at 118°C. Most of the length of the tube lies unprotected and exposed to the outside weather. The air temperature is 5°C and the wind speed is 7.5 m/s. The properties of air at 330 K are: C_p=1007 J/kg°C, k_fb=0.0283 W/m°C, ρ=1.076 kg/m³, and µ_b=1.99∙10^-5 kg/m∙s.

Estimate rate of heat loss from the pipe in kW

Solutions

Expert Solution

Amanda K answered 1 month ago

Next > < Previous

Related Solutions

Inside a boiler with a volume of 0.5 m, there is wet steam with a half...

Inside a boiler with a volume of 0.5 m, there is wet steam with a half volume of water at 140 kPa pressure. As a result of giving heat at constant pressure, after half of the water is vaporized, heat is continued until the pressure in constant volume is 1 MPa. Then, after giving heat at constant pressure, according to the temperature is 400 ° C; Show the temperature, pressure, volume, internal energy, enthalpy and dryness levels in a table...

A steam power plant operates with a boiler that is heated from a heat source at...

A steam power plant operates with a boiler that is heated from a heat source at 457 °C and produces 450 ton/hr. of steam. The steam leaves the boiler at 425 °C and 4 MPa. The steam reaches a turbine at 375 °C and 3 MPa and leaves it at 50 kPa with 4% liquid water. This mixture is flown into a condenser that rejects the heat into a river at 17 °C. Water leaves the condenser at 50 kPa...

A boiler produces steam at a saturated temperature of 300C and at dryness of 92% from...

A boiler produces steam at a saturated temperature of 300C and at dryness of 92% from feedwater at 110C The boiler evaporating rate is 70 kg min. What is boiler heat rate ? The density of steam at pressure 1.100 kPa is ?

An uninsulated steam pipe with a wall temperature of 140 °C passes through a room of...

An uninsulated steam pipe with a wall temperature of 140 °C passes through a room of quiescent air of 14 °C. The pipe is horizontal and has an outer diameter of 20 cm. Find the following (include units if needed): a) The temperature to evaluate properties = __________ b) The Rayleigh number, _____________ c) The heat transfer coefficient, h = ____________ d) q’ along the pipe = ________________ e) The pipe diameter is decreased by 50%. If all other parameters...

Hot water from a boiler of power plant are discharged through a 0.2-m-diameter, thin-walled pipe with...

Hot water from a boiler of power plant are discharged through a 0.2-m-diameter, thin-walled pipe with a velocity of 3.5 m/s. The pipe passes through a room whose air temperature is 3°C and the exterior surface of the pipe is uninsulated and pipe length is 30 m. (a) At a position in the pipe where the mean water temperature is 40°C, determine the heat loss and the pipe wall temperature. (b) If the pipe is covered with a 20-mm-thick layer...

A production company are going to run the entire factory from a controll-room. In the control-room...

A production company are going to run the entire factory from a controll-room. In the control-room there is several controllboards that in the initial period sets of false alarms. In average it sets of two false alarms per hour. The number of false alarms are poisson distributed. a) What is the probability that there is excactly ten false alarms during a 8 hour workday? b) What is the probability that it goes more than one hour before the next false...

A horizontal uninsulated steam pipe passes through a large room whose walls and ambient air are...

A horizontal uninsulated steam pipe passes through a large room whose walls and ambient air are at 300 K. The pipe of 125-mm diameter has an emissivity of 0.85 and an outer surface temperature of 373 K. Calculate the rate of heat loss per unit length from the pipe. Answer should be close to 384W/m Please show all work neatly

Boiler produces 250,000 pounds of steam per hour at 1200 psia and 1050 degrees Fahrenheit from...

Boiler produces 250,000 pounds of steam per hour at 1200 psia and 1050 degrees Fahrenheit from feed water entering the boiler at 1500 psia and 300 degrees Fahrenheit. Fuel oil having a higher heating value of 18,000 Btu/lb is supplied to the burners at a rate of 20,500 lb/hr. Furnace volume is 1,500 cubic feet. Calculate: a) boiler capacity b) factor of evaporation c) equivalent evaporation d) furnace heat release rate in Btu/hr ft^3 e) boiler efficiency

Predetermined Factory Overhead Rate Poehling Medical Center has a single operating room that is used by...

Predetermined Factory Overhead Rate Poehling Medical Center has a single operating room that is used by local physicians to perform surgical procedures. The cost of using the operating room is accumulated by each patient procedure and includes the direct materials costs (drugs and medical devices), physician surgical time, and operating room overhead. On January 1 of the current year, the annual operating room overhead is estimated to be: Disposable supplies $230,600 Depreciation expense 41,600 Utilities 24,200 Nurse salaries 346,200 Technician...

Predetermined Factory Overhead Rate Poehling Medical Center has a single operating room that is used by...

Predetermined Factory Overhead Rate Poehling Medical Center has a single operating room that is used by local physicians to perform surgical procedures. The cost of using the operating room is accumulated by each patient procedure and includes the direct materials costs (drugs and medical devices), physician surgical time, and operating room overhead. On January 1 of the current year, the annual operating room overhead is estimated to be: Disposable supplies $222,000 Depreciation expense 40,000 Utilities 23,300 Nurse salaries 333,400 Technician...

Subjects