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Heat transfers question 1
In an existing heat exchanger of counter flow type, dry air is cooled from 70°C to 35°C at a rate of 1.2 kg/s using cold air at 15°C at a rate of 1.5 kg/s. It is desired to cool this stream by another 10°C by increasing the area with the same inlet conditions. Predict the percentage increase in area
Heat transfers questions
Can someone help pls!!! Question 1 (3.5 marks) A heat engine is a mechanism that transfers...
Can someone help pls!!!
Question 1 (3.5 marks) A heat engine is a mechanism that transfers energy from a warm to a cool region, converting some of that energy into mechanical work. The following equation describes the process analytically W n(1) TH' where: W is the work done by the heat engine is the coefficient of maximum efficiency Tc is the absolute temperature of the cool region TH is the absolute temperature of the warm region (a) Derive the linearised...
1. (a) ( For a power cycle, the heat transfers are Qin 60 kJ and Qout...
(a) (i) For a power cycle, the heat transfers are Qin=60 kJ and Qout=40 kJ. Determine the net work, in kJ, and the thermal efficiency. (ii) A refrigeration cycle operates with a coefficient of performance β=1.5. For the cycle, Qout=500 kJ. Determine Qin and Wcyele each in kJ.(b) A gas within a piston-cylinder assembly undergoes a thermodynamic cycle consisting of three processes:Process 1-2: Compression with p V= constant, from p₁=1 bar, V₁=1.6 m³ to V₂=0.2 m³, U₂-U₁=0.Process 2-3: Constant pressure to...
(a) During 1 complete cycle of an ideal heat engine performs 250J of work and transfers...
(a) During 1 complete cycle of an ideal heat engine performs
250J of work and transfers 150J of hear ro a low reservoir, which
has a temprature of 100 C ?
i)how much heat enters the engine (|Qh|)
ii)what is the efficiency of the ideal engine?
iii)what is the temperature of the high temperature reservoir
?
(b) When temperature of an aluminum coin is increase by 100C and
its circumference increases by %23
i)find the coefficient of linear expansion
ii)find...
9.36 In a nuclear power plant the reactor transfers the heat to a flow of liquid...
9.36 In a nuclear power plant the reactor transfers the heat to a flow of liquid sodium, which in a heat exchanger transfers the heat to boiling water. Saturated vapor steam at 5 MPa exits this heat exchanger and is then superheated to 600°C in an external gas-fired superheater. The steam enters the turbine, which has an extraction at 0.4 MPa to an open FWH, and the condenser pressure is 10 kPa. Determine the heat transfer in the reactor and...
As 390 g of hot chocolate cools in a mug, it transfers 30,000J of heat to...
As 390 g of hot chocolate cools in a mug, it transfers 30,000J of heat to the environment. What is the temperature of the hot chocolate after it has cooled? The specific heat of milk is 3.9 J/goC.
A hot reservoir at the temperature 650 K transfers 2000 J of heat irreversibly to a...
A hot reservoir at the temperature 650 K transfers 2000 J of heat irreversibly to a cold reservoir at temperature 200 K. A) What is the change in entropy of the universe? B) Is entropy a conserved non-conserved quantity?
A source of heat at 1000 K transfers 1000 kW of power to a power generation...
A source of heat at 1000 K transfers 1000 kW of power to a power generation device, while producing 300 kW of useful work. Determine: a. The rate of exergy destruction in this process, if the atmosphere is at 300K. The second law efficiency of the system. b.
a transducer is a device which.... a) transfers heat energy from an electrical component to surrounding...
a transducer is a device which.... a) transfers heat energy from an electrical component to surrounding air. b) send electrical signals from one place to another. c)undergoes an electrical change in response to a physical change.
Can someone help pls!!!
Question 1 (3.5 marks) A heat engine is a mechanism that transfers energy from a warm to a cool region, converting some of that energy into mechanical work. The following equation describes the process analytically W n(1) TH' where: W is the work done by the heat engine is the coefficient of maximum efficiency Tc is the absolute temperature of the cool region TH is the absolute temperature of the warm region (a) Derive the linearised...
(a) During 1 complete cycle of an ideal heat engine performs
250J of work and transfers 150J of hear ro a low reservoir, which
has a temprature of 100 C ?
i)how much heat enters the engine (|Qh|)
ii)what is the efficiency of the ideal engine?
iii)what is the temperature of the high temperature reservoir
?
(b) When temperature of an aluminum coin is increase by 100C and
its circumference increases by %23
i)find the coefficient of linear expansion
ii)find...
9.36 In a nuclear power plant the reactor transfers the heat to a flow of liquid sodium, which in a heat exchanger transfers the heat to boiling water. Saturated vapor steam at 5 MPa exits this heat exchanger and is then superheated to 600°C in an external gas-fired superheater. The steam enters the turbine, which has an extraction at 0.4 MPa to an open FWH, and the condenser pressure is 10 kPa. Determine the heat transfer in the reactor and...
A hot reservoir at the temperature 650 K transfers 2000 J of heat irreversibly to a cold reservoir at temperature 200 K. A) What is the change in entropy of the universe? B) Is entropy a conserved non-conserved quantity?
A source of heat at 1000 K transfers 1000 kW of power to a power generation device, while producing 300 kW of useful work. Determine: a. The rate of exergy destruction in this process, if the atmosphere is at 300K. The second law efficiency of the system. b.
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