NUC350_M2.7_Quiz

An overheating vehicle is being discussed. Technician A states that coolant in a normal flow cooling system flows from the radiator to the heater core to warm up the passenger compartment quickly. Technician B states that in a reverse flow cooling system, coolant flows to the cylinder heads first, which keeps engine components at a more uniform temperature. Who is correct? Select one: a. Technician A only b. Technician B only c. Both Technicians A andB d. Neither Technician A nor B

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Get the following values for each stage using NIST tables: Stage 5(feed water in): P5, T5, H5 Stage 6(feed water out ): P6, T6, H6 Explain how to get values please.

Required information Problem 07.025 - DEPENDENT MULTI-PART PROBLEM - ASSIGN ALL PARTS NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Refrigerant-134a enters the coils of the evaporator of a refrigeration system as a saturated liquid-vapor mixture at a pressure of 140 kPa. The refrigerant absorbs 200 kJ of heat from the cooled space, which is maintained at -10°C, and leaves as saturated vapor at the same pressure. Problem 07.025.c - Total entropy change of the process Determine the total entropy change for this process. The total entropy change for this process is kJ/K.

### Develop the objective for a project report of a cell for the energy reuse of superheated steam within a thermoelectric power plant. The main focus is to determine the pressure drop within the system of this cell and the hydraulic compression pump contained within it. The cell contains, in all, the following equipment: Upstream: Two (tap) switching valves Two eccentric gearboxes Two pressure gauges Downstream: Two pressure gauges Two concentric magnifications A check valve (ball) A (tap) shut-off valve An expansion joint

جية - A - Northern Technical University Technical Eng. College/Kirkuk Fuel and Energy Eng. Tech. Dep. 4th Year Students Final Examination (2022-2023) Subj.: Process of unit operation Date: 6/6/2023 Time: 3 Hours: Morning & Evening Study Note/Answer only four questions, including the first question Q.1: Water is to be cooled in a packed tower from 330 to 295 K by means of air flowing counter currently. The liquid flows at the rate of 275 cm³/m² s and the air at 0.7 m³/m² s. The entering air has a temperature of 295 K and a humidity of 20%. Calculate the required height of tower and the condition of the air leaving at the top. The whole of the resistance to heat and mass transfer can be considered as being within the gas phase and the product of the mass transfer coefficient and the transfer surface per unit volume of column (ha) may be taken as 0.2 s¹. Assuming, the latent heat of water at 273 K = 2495 kJ/kg, specific heat capacity of dry air = 1.003 kJ/kg K, specific heat capacity of…

Three water coils are connected in parallel. The water supplied to the coils feeds into a commonreturn line. The first coil feeds 60 gpm of 125 o F water into the return line. The second coil feeds 50gpm of 120 o F water into the line. The third coil feeds 50 gpm of 118 o F water into the commonreturn line. What is the temperature of the water in the common line after the three streams ofwater mix?

For the NH3/H2O cycle the following relationship give the solution flow rate per unit refrigeration rate: WFS_A * X - WFS_G(X-1) = 1  whereWFS_A = mass fraction of NH3 in solution form the absorberWFS_G = mass fraction of NH3 in solution from the generator X-1 =mass of solution from the generator per unit mass of refrigerant flowFor large systems, a reasonable pressure drop between the evaporator and absorber is 1.5 psiConsider a large NH3/H2O plant operating per the schematic below:  Known/given:i. Refrigeration load = 500 tonsii. Evaporator temperature (state point 10) = 41.1 Fiii. Evaporator pressure (state point 10) = 75 psiaiv. Absorber pressure (state point 11) = 73.5 psia (per rule of thumb above regarding pressure drop between the evaporator and absorber)v. Strong aqua solution temperature (state point 3) = 105 Fvi. Condenser temperature (state point 8) = 100 Fvii. Condenser and tower pressure (state point 7) = 211.9 psiaviii. Concentration split, WFS_G - WFS_A =6% by weight…

! Required information Problem 07.025 - DEPENDENT MULTI-PART PROBLEM - ASSIGN ALL PARTS NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Refrigerant-134a enters the coils of the evaporator of a refrigeration system as a saturated liquid-vapor mixture at a pressure of 140 kPa. The refrigerant absorbs 200 kJ of heat from the cooled space, which is maintained at -10°C, and leaves as saturated vapor at the same pressure. Problem 07.025.b - Entropy change of the cooled space in an evaporating process Determine the entropy change of the cooled space. (You must provide an answer before moving on to the next part.) The entropy change of the cooled space is KJ/K.

For the NH3/H2O cycle the following relationship give the solution flow rate per unit refrigeration rate: WFS_A * X - WFS_G(X-1) = 1  where WFS_A = mass fraction of NH3 in solution form the absorber WFS_G = mass fraction of NH3 in solution from the generator X-1 =mass of solution from the generator per unit mass of refrigerant flow For large systems, a reasonable pressure drop between the evaporator and absorber is 1.5 psi Consider a large NH3/H2O plant operating per the schematic below:  Known/given: i. Refrigeration load = 500 tons ii. Evaporator temperature (state point 10) = 41.1 F iii. Evaporator pressure (state point 10) = 75 psia iv. Absorber pressure (state point 11) = 73.5 psia (per rule of thumb above regarding pressure drop between the evaporator and absorber) v. Strong aqua solution temperature (state point 3) = 105 F vi. Condenser temperature (state point 8) = 100 F vii. Condenser and tower pressure (state point 7) = 211.9 psia viii. Concentration split, WFS_G - WFS_A =6%…