quizq.03.09 Body System #1-3 Integ., Cardio, Circulatory

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

? 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

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.

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

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

%94 KB/S Find : 1. dynamic load on each bearing due to the out-of-balance couple; and 2. kinetic energy of the complete assembly. [Ans. 6.12 kg: 8.7 N-m] L 2. 3. 4. 5. 1. 2. 5. DO YOU KNOW? Why is balancing of rotating parts necessary for high speed engines? Explain clearly the terms "static balancing' and 'dynamic balancing'. State the necessary conditions to achieve them. Discuss how a single revolving mass is balanced by two masses revolving in different planes. Chapter 21: Balancing of Rotating Masses .857 Explain the method of balancing of different masses revolving in the same plane. How the different masses rotating in different planes are balanced? OBJECTIVE TYPE QUESTIONS The balancing of rotating and reciprocating parts of an engine is necessary when it runs at (a) slow speed (b) medium speed (c) high speed A disturbing mass, attached to a rotating shaft may be balanced by a single mass m, attached in the same plane of rotation as that of my such that (a) (b) F For static…

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

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