A turbocharged 6-cy, V-type diesel engine has an air consumption of 3000 kg/hr. per cylinder at rated load and speed. This air is drawn in through a filter by a centrifugal compressor directly connected to the exhaust gas turbine. The temperature of the air from the compressor is 145degC and a counterflow air cooler reduces the air temperature to 45degC before it goes to the engine suction header. Cooling water enters air cooler at 30degC and leaves at 38degC. Calculate the cooling water needed in m³/hr required to cool the total air requirement of the engine at rated load and speed

A turbocharged 6-cy, V-type diesel engine has an air consumption of 3000 kg/hr. per cylinder at rated load and speed. This air is drawn in through a filter by a centrifugal compressor directly connected to the exhaust gas turbine. The temperature of the air from the compressor is 145degC and a counterflow air cooler reduces the air temperature to 45degC before it goes to the engine suction header. Cooling water enters air cooler at 30degC and leaves at 38degC. Calculate the cooling water needed in m³/hr required to cool the total air requirement of the engine at rated load and speed

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

An Spark Ignition engine at WOT by a three-liter, four-cylinder, four-stroke cycle operates at 4800 RPM using either gasoline or methanol. Compute the indicated power generated SI engine at these operation condition. For each case, the intake manifold is heated such that all fuel is evaporated before the intake ports, and the air-fuel mixture enters the cylinders at 60°C and 100 kPa. Compression ratio r. = 8.5, fuel equivalence ratio ¢= 1.0, combustion efficiency is 98%, and volumetric efficiency is 100%. Calculate the indicated specific fuel consumption for each fuel. [gm/kW-hr]
A turbo-generator 16 cylinder , Vee type diesel engine has an air consumption 3000kg/hr per cylinder at rated load and speed. This air is drawn in thru a filter by a centrifugal compressor direct connected to the exhaust gas turbine. The temperature of air from compressor 145℃and a counter flow air cooler reduces air temperature to 45℃ before it goes to engine suction header. Cooling water enter air cooler at 30℃ leaves at 38℃. Calculate AMTD. Answer: 61℃
A trubo-charge, 16 cylinder, vee-type diesel engine has an air comsumpyion of 3000 kg/hr per cylinder at rate load and speed. this air is drawn in through a filter by a centrifugal compressor directly connected to the exhaust gas turbine. the temperature of the air from the compressor to 145 C and a counter flow air cooler reduced the air temperature to 45 C. before it goes to the engine suction header. cooling water enters air at 30 C and leaves at 38 C. calculate the quantity of the cooling water in m/hr required to cool the total air requirement of the engine at rate load and speed. ( hint: use AMTD)
Explain the benefits of adapting a compressor head to operate as a stirling engine ?
4. A BMW with 4-stroke 2.0 L Twin Turbocharger 4-cylinder in-line engine is connected to an engine dynamometer which gives a torque reading of 350 Nm at 3800 rpm. The engine is running with volumetric efficiency of 118% and petrol RON95 (C7H₁7) is used as the combustion fuel. At the engine speed of 3800 rpm, the intake air pressure and temperature both are 155 kPa and 38°C. Given the gas constant value R-0.287 kJ/kgK. Calculate: a) Fuel mass flow rate of the engine. b) Brake specific fuel consumption of the engine at 3800 rpm in g/kW.hr.
4. The open cycle gas turbine operate on Brayton cycle with pressure ratio 4.5/1. Air enter the compressor at 210C and heated to 7800C at entry to the turbine. If mass flow rate is 140kg/min, Determine: a. e b. Wnet
1. At the beginning of the compression process in a hot-air-standard Otto cycle, the air is at 100 kPa and 300° K. The heat added to the air is 0.750 and r= 5. Kgm-K If c,=718 and K=1.38, calculate the pressure, temperature and volume at 790 the cardinal pcints. Also compute heat transfer and work done per Kg of air for each precess and the cycle thermal efficiency.
Q1/ A gas turbine operates with components as shown in figure 1. Air enters this first compressor at 96.5 kPa. and 15.5°C; the pressure ratio is 3 for each stage of compression; the air temperature when entering a turbine is 504.5°C; and the heat perfect exchanger. (Take air index as 1.4 and specific heat as 1.005 kJ/kg.K). Draw T-S diagram and determine: a. The air mass flow rate, and the rates of heat addition and rejection when this produced power is 745.7 kW. b. What will be the effect of using normal heat exchanger on the thermal efficiency? Inter-cooler c2 Cormpressors Turbines Generator set cc 1 State1 Нeat Exchanger State10
Change the question's data and suggest and then solve it :- Q/ The minimum pressure and temperature in an Otto cycle are 100 kPa and 27°C. The amount of heat added to the air per cycle is 1500 kJ/kg. ii /Determine the pressures and temperatures at all points of the air standard Otto cycle. (i) Also calculate the specific work and thermal efficiency of the cycle for a compression ratio .of 8: 1 Take for air: c = 0.72 kJ/kg K, and .7= 1.4
I have been given two questions to solve, the first of the two I solved which is: 'Consider an idea gas turbine cycle with stages of compression and two stages of expansion. Thepressure ratio across each stage of the compressor and turbine is 3. The air enters each stage of thecompressor at 300 K and each stage of the turbine at 1200 K. The cycle has a net power output of110kW. Find the mass flow rate of the air that passes through the engine.' I solved this as follows:1. pressure ratio at state 1 = 1.3862. pressure ratio at state 2 = 4.1583. the enthalpy at state 2 = 411.27 KJ/kg and state 4 = 1277.79 KJ/kg4. pressure ratio at state 5 = 2385. pressure ratio at state 6 = 79.336. work input into the compressor = 221.14 KJ/kg7. work output of the turbine = 662.86 KJ/kg8. net work done by the gas turbine = 440.72 KJ/kg9. mass flow rate = 0.25 kg/s The part I need help in is the follow up question to the one i solved above which is as follows: 'Reconsider the previous problem but now…
A motor car gas turbine unit has two centrifugal compressors in series giving an overall pressure ratio of 6/1. The air leaving the HP compressor passes through a heat exchanger before entering the combustion chamber. The expansion is in two turbine stages, the first stage driving the compressors and the second stage driving the car through gearing. The gases leaving the LP turbine pass through the heat exchanger before exhausting to the atmosphere. The HP turbine inlet temperature is 800 ?C and the air inlet temperature to the unit is 15 ?C. The isentropic efficiency of the compression is 0.8, and that of each turbine is 0.85; the mechanical efficiency of each shaft is 98 %. The heat exchanger thermal ratio may be assumed to be 0.65. Neglecting pressure losses and changes in kinetic energy, calculate: (i) the overall cycle efficiency; (ii) the power developed when the air mass flow is 0.7 kg/s; (iii) the specific fuel consumption when the calorific value of the fuel used is 42 600…
At the beginning of the compression process of air-standard Diesel cycle operating with a compression ratio of 18, the temperature is 300 K and the pressure is 0.1 MPa. The cut-off ratio for the cycle is 2 and the mass flow rate in the system is 1900 kg/hr. Cp=1.006 kJ/kg K Cv= 0.717 kJ/kg K 1) calculate the thermal efficiency of the cycle in %? 2) which formula should be used to determine the thermal efficiency of the cycle ?