must show working !!! Define mass and volumetric flow rates. What are their resp
ID: 2263557 • Letter: M
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must show working !!!
Define mass and volumetric flow rates. What are their respective units? How are they different? Can an open system be in steady flow conditions and have different volumetric flow rates at the inlet and outlet? Why? A steady-state isothermal pump increases the pressure of water from 70 to 700 kPa. The mass flow rate of water is 0.5 kg/s and the water temperature = 15 degree C. The pump inlet diameter is 1-cm, and the outlet diameter is 1.5 cm. Determine The change in kinetic energy of the water from inlet to outlet The change in enthalpy of the water Steam at 4 MPa and 400 degree C enters a nozzle operated at steady-state with a velocity of 60 m/s. The inlet area = 50 cm2. Steam exits at 2 MPa and 300 degree C. Heat is lost from the nozzle at a rate of 75 kw. Determine: The mass flow rate of the steam The velocity of the steam at the nozzle outlet The outlet area of the nozzle The velocity of the steam at the outlet with no heat loss. Carbon dioxide (an ideal gas) enters an adiabatic steady-state compressor at 100 kPa and 300K and exits at 600 kPa and 450K. The mass flow rate of C02 is 0.5 kg/s. Neglecting kinetic energy changes, determine The volumetric flow rate at the compressor inlet The required power A saturated liquid-vapor water mixture at 2000 kPa is throttled to 100 kPa and 125 degree C in an adiabatic steady-state throttling valve. What is the quality of the steam at the inlet? Steam enters the condenser heat exchanger of a power plant at 20 kPa with a quality of 0.95. The mass flow rate of steam = 20,000 kg/hr. The steam is to be condensed to a saturated liquid at 20 kPa by circulating river water through the condenser tubes. To protect aquatic life, the river water leaving the condenser tubes cannot increase in temperature more than 10 degree C over the inlet temperature of 12 degree C. What is the minimum flow rate of river water required to condense the steam? What is the rate of heat removal from the condensing steam? For efficient heat transfer, the difference between the condensing steam and the river water must be at least 20 degree C. Will this condition be met? Explain. Air in a building loses energy due to infiltration of outdoor air at -5 degree C and 90 kPa and a rate of 35 liters/s. The indoor air is maintained at 20 degree C. The mass of the air in the building is constant due to exfiltration of the indoor air. What is the rate of energy loss for the building due to infiltration [in watts)?Explanation / Answer
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A ) MASS FLOW RATE :- In physics and engineering, mass flow rate is the mass of a substance which passes through a given surface per unit of time. Its unit iskilogram per second in SI units, and slug per second or pound per second in US customary units. The common symbol is dot{m} (pronounced "m-dot"), although sometimes ? (Greek lowercase mu) is used.
VOLUME FLOW RATE:-In physics and engineering, in particular fluid dynamics and hydrometry, the volumetric flow rate, (also known as volume flow rate, rate of fluid flow or volume velocity) is the volume of fluid which passes through a given surface per unit time. The SI unit is m3
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