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only part b needed

REFRIGERANT 134 a 3 Ask: HEAT EXCHANGER AIR N 2 AIR REFRIGERANT 134a 1 Bar 89,6 F (AV₁) = 1m³/s MASS FLOW RATE 2) HEAT TRANSFER RATE and 0 P₁ OF ^^ 3 P GIVEN : KINETIC ENERGY AND POTENTIAL ENERGY = O STEADY STATE 4 REFRIGERANT T₂ 71.6 F 2 134 a 2 = = 0.95 Bar REFRIGE RANT AIR. 1349 BETWEEN P3 = X 3= 5 Bar IN kg/s 0.2 41 P4= 5 Bar T4 = 68°F

Thermodynamics: Please show me how to solve the following practice problems in step by step solution (Thank you so much!)

? A rocket has the following characteristics: 1. Initial mass = 250 kg 2. Mass after rocket operation. A rocket has the following characteristics: 1. Initial mass = 250 kg 2. Mass after rocket operation = 140 kg 3. Mass of %3D payload and structure = 120 kg 4. Specific impulse = 285 s 5. Rocket operation = 3.5 s 1328 Aircraft Propulsion and Gas Turbine Engines Calculate a. Mass ratio b. Propellant mass flow rate c. Thrust d. Exit velocity e. Total impulse

1. Using the Steam Tables, determine the heat absorbed by the boiler (KW) and Wsf when subcooled water at pressure = 5 Mpaa (subcooled by 64 deg C measured at the boiler inlet), is superheated to 100 degrees SH at the same pressure. Flow rate is at 10 cubic meters per minute. Ans.: a) Qa = b)Wsf= Hint: Use v at compressed water temp. at boiler inlet to convert to mass flow rate. Process is isobaric (Constant Pressure, where Q=m x AH).

Thermodynamicss

B) The air flow to a four cylinder four-stroke engine is 2.15 m³/min. During a test on the engine the following data were recorded: Bore 10.5cm; stroke 12.5cm; engine speed 1200 rpm, torque 150 N.m, fuel consumption 5.5 kg/hr, calorific value of fuel, 43124 kJ/kg, ambient temperature 1-The brake thermal efficiency. and pressure are 20°C and 1.03 barş. Calculate: 2-The brakes mean effective pressure. 3-The volumetric efficiency.

17.21 Determine the cylinder diameter and stroke length for a 8 cylinder, single acting, 2-stroke diesel engine for which details of engine and indicator diagram are as under; Indicated power = 16266.7kW Speed L:D ratio = 1.5 150 грm Area of indicator diagram Length of diagram 550 mm2 %3! 60 mm Indicator spring constant 14.7 × 10’ Pa per m [80 cm, 120 cm]

Wind power is defined as the use of air flow through wind turbines to provide the mechanical force to generate electricity. Wind power is an alternative to burning fossil fuels, and is renewable and produces no greenhouse gas emissions during operation. Modern horizontal-axis wind turbines often use three blades. Theoretically, the maximum power P (unit: watts) that a three-blade wind turbine can extract from the wind power can be calculated as: P = pAv³C₁. . (Equation 1) where p is the air density (kg/m³), A is the sweep area of the turbine (m²) and can be calculated from the length of the turbine blades, and v is the wind speed (m/s). Cp is the power coefficient that is unique to each turbine type. This coefficient represents the amount of kinetic energy from the wind that is captured by the turbine. From the Betz's limit law we know that the best power conversion possible is Cp,max = 0.59. Part 1 Given the following data: Blade length /= 50 m Air density p= 1.5 kg/m³ Power…

You are replacing an HVAC system in your building. The system is a hot water system that consists of a boiler that feeds several air-handling units. The total heating load for the building is 2649 thousand Btuh. The max pressure required to pump through the furthest air-handling unit is 69 ft in total head. The inlet temperature at the air-handler is 196 F and the inlet-outlet temperature difference is 30 F. What is the required total flow rate (gpm)?

1. Using the Steam Tables, determine the heat absorbed by the boiler (KW) and Wsf when subcooled water at pressure = 5 Mpaa (subcooled by 64 deg C measured at the boiler inlet), is superheated to 100 degrees SH at the same pressure. Flow rate is at 10 cubic meters per minute. Ans.: a) Qa b)Wsf= Hint: Use v at compressed water temp. to convert to mass flow rate.

L1

19. A spacecraft, traveling in deep space, fires thrusters to achieve a change in speed of 2.8 km/s. If the specific impulse of the thrusters is 300 s, what is the ratio of the initial spacecraft mass to the spacecraft mass after the thrusters have fired? a. 0.9 3000/2.8 2.6 C. 8.2 d. None of the above 20. The state vectors for an Earth-orbiting spacecraft at a given point in tim 5

The temperatures of the 20 ºC 25 ºC 30 ºC water at outlet Task 1  Explain the system parameters using the Non- Flow Energy Equation

Real Pressure, Barometer Room Volumetric Mass Rate of Trail Speed Difference Pressure Temp. Rate of Flow Flow No. ho Pa Ta. Va ma RPM cm H2O kN/m? K L/sec kg/sec 1200 20 24 25° 1700 25 35 25° 2000 35 45 25° 2250 45 55 25° 2500 55 60 25° 1. 2. 3. 4. 5. h, * P, Ta=25c° o. D=16.34 mm m, = 0.00001232* D² * V T. find Va,ma 1 cm H20=98.1 N/m h, *T. Va = 0.003536* D² Pa

1. The unit velocity head is a. ft-lbf/lbm b. ft-lb/sec c. ft-lbm/ft^3 d. ft-lbf/sec 2. Bernoulli’s equation describes a. kinetic energy balance in laminar flow b. mechanical energy balance in boundary layer c. mechanical energy balance in potential glow d. mechanical energy in turbulent flow 3. The continuity equation a. relates work and energy b. is only applicable to liquid c. relates masa flow rate along a stream tube d. stipulates that newtons second law of motion must be satisfied at every point in the fluid

Critically evaluate fluid flow and energy principles in relation to their application in the design and control of heating system and water services design.

ull MTN LTE 4:13 AM O 27% O (b) A jet of water, having a velocity of 30 m/s impinges on a series of vanes with a velocity of 15 m/s. The jet makes an angle of 30° to the direction of motion of the vane when entering and leaves the vane at an angle of 120°. (i) (ii) (iii) (iv) Sketch the velocity diagrams at the entrance and exit Determine the vane angles so that the water enters and leaves the vane without shock. If the jet is 60 mm in diameter, determine the work done for every second. What is the velocity the water as it exits the vane?

A condenser is used to convert a gas into a liquid. The energy equation for a condenser is: Qcv = m(h₂ h₁) where 1 and 2 represent the state at the inlet and exit to the condenser (control volume). In addition to the steady state and steady flow assumptions, it has been assumed that: A) the change in kinetic energy is negligible OB) the change in potential energy is negligible OC) the net power input to the condenser is zero OD) all of the above, i.e. A), B) and C)

Q 11 please

Topic : Mixture Flow Problem A tank initially holds 100 gal of salt solution in which 50 Ib of salt has been dissolved. A pipe fills the tank with brine at the rate of 3 gpm, containing 2 lb of dissolved salt per gallon. Assuming that the mixture is kept uniform by stirring, a drain pipe draws out of the tank at 2pm. Find the amount of salt at the end of 30 minutes. Ans. 171.24 Ib

Thermodynamics: Please show me how to solve the following practice problems in step by step solution (Thank you so much!)

Provide clear and complete solution as well as diagram. The discharge pressure of an air compressor is 8 times the suction pressure. If volume flow at suction is 0.23 m3/s, what is the compressor power assuming n equals 1.35 and suction pressure is 97 kPa? A. 64.58 kW                C. 60.45 kWB. 61.48 kW                D. 71.5 kW

Part I : Analysis of heat exchangers in engineering applications(max. 5 pages)Select any thermal energy system you are interested. Describe the system and statehow the system works. The system should have at least one heat exchanger.Analyse the design of the heat exchangers and their functions in the system. Part Iand Part II are connected. Select a system you are able to complete the exergyanalysis in Part II.Part II: Exergy analysis & performance optimisation of heat exchangersfor a thermal energy system (max. 5 pages)Perform exergy analysis and performance optimization of the thermal energy systemin Part I. For the above question, the thermal energy system i have chosen is a steam rankine cycle, so for part II, i would like exergy analysis and performance optimistaion to be done 3 times over for a steam rankine cycle, show full working calculations for each and explanations. Provide references for any values used.

Part I : Analysis of heat exchangers in engineering applications(max. 5 pages)Select any thermal energy system you are interested. Describe the system and statehow the system works. The system should have at least one heat exchanger.Analyse the design of the heat exchangers and their functions in the system. Part Iand Part II are connected. Select a system you are able to complete the exergyanalysis in Part II.Part II: Exergy analysis & performance optimisation of heat exchangersfor a thermal energy system (max. 5 pages)Perform exergy analysis and performance optimization of the thermal energy systemin Part I.

Paragraph 1: In control mass system.... A. No mass can escape or enter the control volume B. Same amount of matter at all times C. The boundaries may be movable or stationary D. All of the mention

The flow rate of a hydraulic fluid with a Sg of 1.08 through a 2-in. I.D. orifice is 50 gal/min. If the pressure drop across the orifice is 5 lbf/in.", what is the discharge coefficient?

Problem 2. Fluid circulates steadily through four devices in a power plant as shown in the sketch. Mass flow rates and enthalpies per unit mass are tabulated for some of the states. Heat- and work-interaction råtes are tabulated for some of the devices. Complete the following tables: h State (kg/s) (J/kg) Device (W) (W) A D B 1 15 A. 150 2 13 30 3 25 C 3. 4. 5

Q True or False 1. PMM1 states that: there can be no machine which would continuously supply mechanical work without some form of energy disappearing simultaneously. 2. The filling of a tank is an example of unsteady flow process. 3. For steam nozzle the change in potential energy is zero 4. In case of boiler the change in kinetic energy is zero. 5. For steady flow only interaction between system surroundings are work and heat. 6. Superheated steam behaves like a gas and therefore, it follows gas laws 7. Extensive properties do not depend on the mass of the system. 8. The change of internal energy for an isolated system is equal to heat and work. 9. With the use of centrifugal pump, the heat transfer is maximum. 10. For the flow in reciprocating compressor, the change in the kinetic energy is maximum

Please solve and answer the question correctly please. Thank you!!

The beating of the human heart can be modeled by a thermodynamic cycle. In this chapter, we have used PV diagrams to show processes occurring for a gas. Such diagrams can also be used for a liquid, such as blood in the heart. The figure below shows an idealized cycle for the left ventricle (LV) during a single beat of the heart. P(mm Hg) 120 78.0 20.0 10.0 A V (mL) 44.0 149 The cycle begins at point A with the opening of the mitral valve, which fills the LV with blood from the left atrium. During this process, the pressure and volume of the blood in the ventricle increase linearly until the mitral valve closes at point B. At that point, the muscles surrounding the LV contract, increasing the pressure of the blood. Because both the mitral and the aortic valves are closed, and because blood is essentially incompressible, the process is isovolumetric. The pressure increases to the diastolic pressure of 78.0 mm Hg (1 mm Hg = 133.322 Pa) at point C. Now, the aortic valve opens, pumping the…