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Lecture 13 FIRST LAW ANALYSIS FORLecture 13 – FIRST- LAW ANALYSIS FOR A CONTROL VOLUME

Compressor

A compressor receives 0.1 kg/s R-134a at 150gkPa, -10oC and delivers it at 1000 kPa, 40oC.The power input is measured to be 3 kW. The

h h t t f t i t 100 kPcompressor has heat transfer to air at 100 kPacoming in at 20oC and leaving at 25oC. Howmuch is the mass flow rate of air?much is the mass flow rate of air?

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Mixing Chamber

In engineering applications, thesection where the mixingprocess takes place iscommonly referred to as aymixing chamber

The T elbow of an ordinary shower serves as the

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The T-elbow of an ordinary shower serves as the mixing chamber for the hot- and the cold-water streams.

Thermal Power PlantEquipments Involved with simple Thermal Power

Thermal Power Plant

Plant• Boiler• Turbine• Condenser• Pump

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Thermal Power Plant

BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956

Thermal Power Plant

BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956

Thermal Power Plant

BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956

Thermal Power Plant

Boiler

BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956

Boiler

Multi component systems

BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956

Multi component systems

BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956

Multi component systems

A modern jet engine has a temperature afterb ti f b t 1500 K t 3200 kP it tcombustion of about 1500 K at 3200 kPa as it enters

the turbine section, see state 3 Fig. P.6.100. Thecompressor inlet is 80 kPa 260 K state 1 and outletcompressor inlet is 80 kPa, 260 K state 1 and outletstate 2 is 3300 kPa, 780 K; the turbine outlet state 4into the nozzle is 400 kPa, 900 K and nozzle exit,state 5 at 80 kPa, 640 K. Neglect any heat transferand neglect kinetic energy except out of the nozzle.Find the compressor and turbine specific work termsand the nozzle exit velocity.

BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956

Multi component systems

BITS Pilani, Deemed to be University under Section 3 of UGC Act, 1956

Refrigerator

Equipments Involved with Refrigerator

• Evaporator• Compressor• Condenser• Throttling Valve

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Refrigerator

BITS Pilani, Pilani Campus

Refrigerator

BITS Pilani, Pilani Campus

Refrigerator

A R-410a heat pump cycle (refrigerator) shown in Fig. P6.99 has a R-410a flow rate of 0.05 kg/s with 5 kW into the compressor. The following data are given

Calculate the heat transfer from the compressor, the heat transfer from the R-410a in the condenser and the heat transfer to the R-410a in the evaporator

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transfer to the R 410a in the evaporator.

Refrigerator

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