
Concept explainers
a)
The mass flow rate of the cooling water.
a)

Answer to Problem 138RP
The mass flow rate of the cooling water is
Explanation of Solution
Apply the dry air mass balance on the cooling tower.
Here, mass flow rate of air at inlet and outlet is
Apply the water mass balance on the cooling tower.
Here, mass flow rate of water at state 3 and 4 is
Apply the energy balance on the cooling tower.
Apply steady flow energy balance equation on the cooling water.
Here, rate of heat removal is
Conclusion:
Refer Table A-4, “Saturated water – Temperature table”, obtain the enthalpy
Refer Table A-4, “Saturated water – Temperature table”, obtain the enthalpy
Refer Fig A-31, “Psychrometric chart at 1 atm total pressure”, at dry bulb temperature
Refer Fig A-31, “Psychrometric chart at 1 atm total pressure”, at temperature
Substitute
Substitute 70 MW for
Thus, the mass flow rate of the cooling water is
b)
The volume flow rate of air into the cooling tower.
b)

Answer to Problem 138RP
The volume flow rate of air into the cooling tower is
Explanation of Solution
Write the expression to obtain the volume flow rate of air into the cooling tower
Conclusion:
Substitute
Substitute
Thus, the volume flow rate of air into the cooling tower is
c)
The mass flow rate of required makeup water.
c)

Answer to Problem 138RP
The mass flow rate of required makeup water is
Explanation of Solution
Write the expression to obtain the mass flow rate of required makeup water
Conclusion:
Substitute
Thus, the mass flow rate of required makeup water is
Want to see more full solutions like this?
Chapter 14 Solutions
Thermodynamics: An Engineering Approach
- Please draw the front top and side view for the following objectarrow_forwardDraw the top viewarrow_forwardSuppose that a steel of eutectoid composition is cooled to 675°C (1250°F) from 760°C (1400°F) in less than 0.5 s and held at this temperature. (a) How long will it take for the austenite-topearlite reaction to go to 50% completion? To 100% completion? (b) Estimate the hardness of the alloy that has completely transformed to pearlite.arrow_forward
- Problem 2: Determine the components of the reaction at point B (Please use paper sheet + FBD ,don't use chatgpt) MECHANICAL ENGGarrow_forwardARL040_AE_Kn_2of3... Dor Question 4. A two-throw crankshaft has masses distributed as shown: RAH 90 rpm A TRAV B Re Rev M₁ = 15kg; M₂ = 12kg L = 950mm; 1, 350mm; 1₁ = 600mm; 0₁ = 90°; 02=0°; r₁ = 300mm; r250mm The crankshaft is to be balanced by attaching masses at radii of 300 mm and rotating in planes 150 mm outside the planes of number one and number two cranks. Determine the magnitude and angular position of the balance masses. Answer 4.arrow_forwardFEAarrow_forward
- Finite Element Analysisarrow_forwardan experimental research station is constructed on a concrete slab floor. The heat loss from the floor slab is significant, given the cold environment, and is measured to be 5 kW. The edges of the floor slab are insulated with a 60 mm thickness of cellular glass insulation. The width of this insulation at the floor slab is 0.9 m. To avoid excessive fuel consumption, the station air temperature is maintained at a slightly cool temperature of 18ºC. The station is constructed in a square shape, to keep the surface area to volume ratio low; the horizontal dimensions of the floor of the station are 20 m by 20 m. The number of occupants in the research station varies between 5 and 20, depending on the research workload.a) Determine the design outdoor temperature that was used in designing the research station.b) If the floor dimensions of the station are changed to 15 m by 25 m, would the design outdoor temperature that was used in designing the research station from part (a) change? If so,…arrow_forwardFinite element analysisarrow_forward
- a station is constructed on a concrete slab floor. The heat loss from the floor slab is significant, given the cold environment, and is measured to be 5 kW. The edges of the floor slab are insulated with a 60 mm thickness of cellular glass insulation. The width of this insulation at the floor slab is 0.9 m. To avoid excessive fuel consumption, the station air temperature is maintained at a slightly cool temperature of 18ºC. The station is constructed in a square shape, to keep the surface area to volume ratio low; the horizontal dimensions of the floor of the station are 20 m by 20 m. The number of occupants in the research station varies between 5 and 20, depending on the research workload.a) Determine the design outdoor temperature that was used in designing the research station.b) If the floor dimensions of the station are changed to 15 m by 25 m, would the design outdoor temperature that was used in designing the research station from part (a) change? If so, what would it be?…arrow_forwardFinite Element Analysisarrow_forwardFinite Element Analysisarrow_forward
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY





