Explain in detail the phenomenon and concept of the heat transfer involved in the heat exchanger and the way to enhance the heat transfer performance of the heat exchanger.

Q: What is the rate of heat transfer when q= 90, t1 = 20, t2= 40

A:

Q: 2) A heat pump with the amount of heat of liquid refrigerant (mix) when it will enter the expansion…

A: Answer: The coefficient of performance of the heat pump is 0.575.

Q: During constant temperature process, the initial pressure and volume are 5 x 109 and 5000 mm3…

A:

Q: Send correct answer

A: To convert world energy consumption from quadrillion Btus to the equivalent quantities in other…

Q: 1.67. Given that a gas contained within a piston-cylinder assembly, initially at a volume of 0.4 m3,…

A:

Q: A piston-cylinder assembly contains 0.4 lb of air initially at a pressure of 30 lb/in² and a…

A: Given: mass, m = 0.4 lb T1 = 300 deg F P = 30 lbf/in2 Volume is doubled To find: Heat transfer Q12

Q: Why is work done a scalar quantity?

A: Physical work is obtained as dot product of force and displacement. Since force and displacement are…

Q: What is a steady-flow process?

A: A steady flow process is a process that is defined for flow problems in an open system. In a steady…

Q: What is Coefficient of Performance (COP)? Also differentiate between COP and Efficiency?

A: Coefficient of Performance is ratio of desired effect to the input work. It is also  called as…

Q: GIVE AN EXAMPLE OF HOW TO ENERGY TRANSFER BY HEAT?

A: Let us consider example of Internal combustion(IC) engine fuels. In IC engines, fuels (gasoline or…

Q: What is the difference between Energy transfer and Energy transformation With an example؟

A: Solution:

Q: What is the Kelvin equivalent of 70 0F.

A: Given data: The temperature is TF = 70 oF.

Q: Explain energy transfer by radiation with suitable justification

A: To explain: The energy transfer by radiation. Concept used: Radiation: Radiation is the transfer of…

Q: What is the classification of geothermal resources? 1. Hydrothermal II. Magma Energy III. Enhanced…

A:

Q: 6kg 403g - 3 kg 779 g =

A: We know that 1kg = 1000 grams 6 kg = 6000 grams 6kg 403 g= 6403 grams 3kg = 3000 grams 3 kg 779g=…

Q: When heat is transferred form hot body to cold body, in a straight line, without affecting the…

A: Conduction is the vogue of heat transfer in which transfer of heat takes place due to the lattice…

Q: Why transformation of energy is important?

A: Solution:

Q: Derive the relation between system approach and control volume approach.

A: Control volume approach is accurate for any flow distribution but is often based on 1 dimensional…

Q: A coal-burning steam locomotive heats steam to 180 degrees Celsius and exhausts it at 100 degrees…

A: According to the given information, we know  coal-burning steam locomotive heats steam to 180…

Q: Which of the following system does not allow neither mass nor energy transfer between system and…

A: There are three types of systems:- 1) open system- In this type of system both mass as well as…

Q: What is the relation between work and velocity?

A: The expression of the force is given by, F=m×Vt......1 Here, F is the force, m is the mass, V is the…

Q: By using an example explain the difference between the steady-state and dynamic state of the…

A: Solution:   The major difference between the steady-state and dynamic state process is given below:

Q: Which of the following simultaneous heat transfer mechanisms applicable to moving fluid; a. None of…

A: We have to find Which of the following simultaneous heat transfer mechanisms applicable to moving…

Q: THERMAL PROPERTIES Cp,water = 4, 182 kg°C Pwater = 993- Question 1 How much energy does the cooling…

A: For solution refer below images

Q: The area under p-v diagram for the constant volume process represents the work done.

A: the area under pv diagram for the constant volume process represents the work done  false  true

Q: A piston-cylinder contains nitrogen initially at 100 kPa, 20°C, and a volume of 0.283 m³ (State 1).…

A:

Q: motion and its causes such as force, torque, energy and momentum

A: A rigid body is a solid body in which solid deformation is zero or it can be neglected.

Q: Work done by the weight depends on which factors?

A: Work done Weight is the path independent quantity, so it comes under the conservative force. That’s…

Q: Q2/A: What are the technologies that promote the sustainable energy?

A: Sustainable energy are basically renewable energy which can be used again and again, these types of…

Q: Thermodynamics   How does fluid friction and heat loss affect the efficiency of plant and explain…

A: Given Power plant To find Efficiency of the plant

Q: Question 1 Estimate the size of cooling equipment (in kW), that is needed for a new post office…

A:

Q: A room’s sensible space load is from occupants and infiltration, but excluding intentional…

A: Given data: Ventilation(Qv)=3.2 kWQ=600 L/s Need to determine the room sensible heat ratio.

Q: 2. Define the specific heat at constant volume and the specific heat at constant pressure.

A: Define the specific heat at constant volume and at constant pressure.

Q: QI: At winter design conditions, a house is projected to lose heat at a rate of 65,000 Btu/h. The…

A: Projected heat loss rate = 65000Btu/hInternal heat gain =6000Btu/hSo net heat loss = 65000-6000 =…

Q: When does the Body Force develop?

A: Body forces are the forces which act on the mass/volume of an object which does not require any…

Mechanisms of heat transfer

Heat transfer is an essential discipline in thermal engineering that deals with the transfer, conversion, usability, and creation of heat or thermal energy. Transfer of heat occurs through various mechanisms like conduction, convection, radiation, and change of phases. All these mechanisms have distinct characteristics, but these mechanisms can simultaneously occur in an identical system.