Q74-For a reversible heat engine, a-f 8Q <0, T 8Q = 0, T Q75-The final temperature during filling process of a small initially evacuated tank is given by, a - T2 = T1, b- T2 T1 2 =, c- T2 = (T1)", d- T2-YT1

Q74-For a reversible heat engine, a-f 8Q <0, T 8Q = 0, T Q75-The final temperature during filling process of a small initially evacuated tank is given by, a - T2 = T1, b- T2 T1 2 =, c- T2 = (T1)", d- T2-YT1

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Q.1. A refrigeration process with interstage cooling uses refrigerant HFC-134a, and the outlet of the condenser is to be saturated liquid at 40°C. Refer to the following figure for stream numbers in your solution. The pressure of the flash chamber and the intermediate pressure between compressors is to be 290 kPa. The evaporator is to operate at -20°C and the outlet is to be saturated vapor. The flowrate of stream 1 is 23 kg/h. The flash chamber may be considered adiabatic. The compressors may be considered to be 80% efficient. a) What is the power input required to the first compressor? b) What are the flowrates of streams 6 and 7? What is the enthalpy of stream 4? Hot Side 6 5 Condenser 2nd Stage Compressor Throttle Valve 7 Flash Chamber Vapor Phase Only 1st Stage Compressor 8 Throttle Valve Evaporator 1 2 Cold Side
Pa Complete the table given below for a closed system undergoing a cycle. Coet Wet Process Wot kJ AUKJ 1-2 21 11 2-3 14 -8 3-4 -5 4-1 4. 6.
7. A residential heat pump system operating at steady state is shown in the figure. Refrigerant 134a circulates through the components of the system, and the property data at the numbered locations are given on the figure. The mass flow rate of the refrigerant is 4.6 kg/min. Kinetic and potential energy effects are negligible. Determine (a) Rate of heat transfer between the compressor and the surroundings, in kJ/min. (b) Coefficient of performance
DEVICE is REFRIGERATION & 12 23 3 4 4 → 1 At 1. AT 2: AT 3 AT 4 : : ADIABATIC COMPRESSION COOL AT CONSTANT PRESSURE P1 = ADIABATIC EXPANSION HEATING AT CONSTANT PRESSURE P2 = P1 = A BAR P2 P3 3.2 BAR ASK: A) B) T2 c) HEAT 74 T1 HEAT CAPACITIE C 4 тн E SPECIFIC HEAT RATIO OF WORKING Y = 1.5 T3 = EXCHANGE S UNDERGOES REVERSE BRAYTON CYCLE -5.15e MABS OF WORKI G SUBSTANCE M = 116g 17.85°C SUBSTANCE cu & Cp iN CELCIUS Q23 IN s/g & Q41 is IDEA
E 01 Image Word 1/1 Using PV & TS Diagrams derive the formulae of a. Temperature, Pressure & Volume c. Change of Enthalpy e. Change of Entropy g. Work steady-flow of the following processes; 1. Isopiestic, 2. Isochoric, 3. Isothermal, 4. Adiabatic, 5.General Polytropic b. Heat addedrejected d. Change of Internal Energy f. Work non-flow Tap to view in full-screen OCR Rotate Markup Extract Text Signature Note
Q.2: A refrigeration system using refrigerant 22 is to have a refrigerating capacity of 80 kW. The cycle is a standard vapor-compression cycle in which the evaporating temperature 42°C. -8°C and the condensing temperature (a) Determine the volume flow of refrigerant measured in cubic is meters inlet at the to the compressor. second per (b) Calculate the power required by the compressor. (c) At the entrance to the evaporator what is the fraction of vapor in the mixture.
1. An engine operating on the air standard heat engine has 13 KJ heat added at isochoric process, heat ratio of air = 1.35. If the minimum pressure and temperature are 101 KPa and 305 K, respectively. The maximum volume of 3.8 x 10 2 m³ with clearance of 10%. Determine • The work of cycle in KJ • The mep in MPa
Condenser 30 c „Flash Chamber Pi Evaporator OC & 50 kW For a 2-stage ammonia compression system, determine: 1. Draw the PH diagram showing the condenser, evaporator, & compressor discharge temps, intercooler pressure, all enthalpies & compressor suction specific volumes, m/kg 2. Compute the intercooler pressure in Bars & equivalent Ti in °C 3. Compressor discharge temps T: & T4 4. Mass of refrigerants m:, ms & m: in kg/sec 5. Compressor power Wi, W & total W- in kW & HP 6. Compressors PD with equal volumetric efficiency 80%; m/s 7. Condenser capacity, kW 8. Using a single stage compression, calculate & compare the power of the compressor/s in kW & HP
Exercise 5 We wan to regulate the temperature of the water heater of a bungalow (ive keep it fixed) at T₂ -333K using the site where it is located: hot outside air at engine pump T₁ = 310k and cold water from A reversible dithermal is used for this purpose, operating between the outside air and the lake, supplying the energy required for a reversible heat operating between the water heater of the bungalow and the lake. Calling Or, the heat transfer received by the engine from the outside air and Q2, the heat transfer actually received by the water heater of the bungalow, determine the thermal efficiency of Such a device! e = 9₂ PH Please answer the above question step-wise, showing detailed Eveverse 6. explanations with diagrons Thanks in advance !!!! If necessar a lake at T3 2 285K. ecessory.
3. The food storage room requires a cooling system with a capacity of 15 tons of refrigeration that operates at an evaporator temperature of -17.5 ° C and a condenser temperature of 40.7 ° C. The refrigerant used is R-134a and the system operates in saturated conditions. a. COP = Answer b. Refrigerant flow rate = Answer kg / s. c. Heat loss rate in condenser = Answer kJ / s.
Question#1 Pressure-enthalpy chart is another method to obtain an initial performance estimation of refrigeration/heat pump cycles used in heating, ventilation and air-conditioning (HVAC) system. Your role is to provide design and installation services for air -conditioning (AC) system a preliminary performance estimation. Given the following design specifications: Refrigerant HFC-134a as the working fluid - Ideal cycle operation condition is assumed - Cycle is operated at high pressure line of 0.8 MPa - Cycle is operated at low temperature line of – 10° C Flow rate is 0.1 kg/sec The head of the department in the company that you are working in asked you to make use of pressure -enthalpy chart provided for HFC-134a refrigerant Task.1 1. Determine the Refrigeration effect (RE), heat of compression (HOC), and heat of rejection (HOR) and their corresponding rate/power values in kW.
Draw the schematic and p-h diagram for the problem below: A two-stage cascade refrigeration system uses ammonia as the working substance. The evaporator is at -35 degree Celsius and high pressure condenser is at 1514.2 kPa. The cascade condenser is a direct-contact type. The refrigeration load is 90 tons. Determine the a.) the COP, and b.) the quantity of the fluid entering.