Q2: A 1.78 L four-stroke petrol engine was tested at 2500 rpm. The developed brake power is 28 kW and the brake specific fuel consumption (bsfc) is 290 g/kW.hr. Air consumption is measured by means of air-box method with orifice diameter 3.2-cm and discharge coefficient 0.62 and the pressure difference across the orifice is 150-mm-water. The ambient pressure and the temperature in the test room is 101 kPa and 20 °C. Assume: CV = 43.9 MJ/kg, PH20 =1 =10³ kg/m³, , comb = 98%, nmech 87%. (i) Determine the bmep, AFR, nv, power loss as friction, th,b. (ii) draw up the heat balance sheet on percentage basis, if the cooling water flow is 15 kg/min; rise in temperature of cooling water is 33 °C; exhaust gas temperature is 485 °C; Cpw is 4.2 kJ/kg.K and Cpexh is 1.25 kJ/kg.K.

Q2: A 1.78 L four-stroke petrol engine was tested at 2500 rpm. The developed brake power is 28 kW and the brake specific fuel consumption (bsfc) is 290 g/kW.hr. Air consumption is measured by means of air-box method with orifice diameter 3.2-cm and discharge coefficient 0.62 and the pressure difference across the orifice is 150-mm-water. The ambient pressure and the temperature in the test room is 101 kPa and 20 °C. Assume: CV = 43.9 MJ/kg, PH20 =1 =10³ kg/m³, , comb = 98%, nmech 87%. (i) Determine the bmep, AFR, nv, power loss as friction, th,b. (ii) draw up the heat balance sheet on percentage basis, if the cooling water flow is 15 kg/min; rise in temperature of cooling water is 33 °C; exhaust gas temperature is 485 °C; Cpw is 4.2 kJ/kg.K and Cpexh is 1.25 kJ/kg.K.

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

8
= Q2: A 1.78 L four-stroke petrol engine was tested at 2500 rpm. The developed brake power is 28 kW and the brake specific fuel consumption (bsfc) is 290 g/kW.hr. Air consumption is measured by means of air-box method with orifice diameter 3.2-cm and discharge coefficient 0.62 and the pressure difference across the orifice is 150-mm-water. The ambient pressure and the temperature in the test room is 101 kPa and 20 °C. Assume: CV 43.9 MJ/kg, PH20 -10³ kg/m³, comb = 98%, mech = 87%. (i) Determine the bmep, AFR, nv, power loss as friction, th.b. (ii) draw up the heat balance sheet on percentage basis, if the cooling water flow is 15 kg/min; rise in temperature of cooling water is 33 °C; exhaust gas temperature is 485 °C; Cpw is 4.2 kJ/kg.K and Cpesh is 1.25 kJ/kg.K.
Solve correctly please, will rate for correct ans only.
1. For a given pump, the diameter, the gauge pressures at the inlet and outlet are −30 × 103 P a and 200 × 103 P a, respectively. If the flow rate is 0.1 m3/s, and the power required is 25 kW, find the efficiency. The intake and discharge are at the same height. 2. The impeller of a radial-flow turbine has an outer radius of 4 f t, turning at 200 rpm. The volume flow rate is 1000 ft3/s, and it discharges in the axial direction. Neglect all losses. If the tangential component of the velocity at the inlet is 5 f t/s, find: (a) The torque exerted on the impeller. (b) The power developed by the machine.
COMPLETE SOLUTIONS
Q24
Dm = a shaft with a diameter of 75mm Dy = 75.150mm in diameter and L =Its viscosity is 0.15 kg / m.s in a 201 mm long bed.1551 rev / min in axial direction with a fluidis rotated quickly. Accordingly, the power released by frictioncalculate
A prototype pump is designed to so that the attached dimensionless performance curves apply. (a) If the pump is powered by a fixed speed motor delivering a rotational speed of 400 rpm and the impeller diameter is 2 m find the unknown quantities (Q, H, P,n ). Assume the pump is operating a peak efficiency and is pumping cold water. (b) If the pump is to be connected to standard steel pipe, which pipe should be used. Сн 1.00 Efficiency-n 0.75 CH 3 0.50 0.25 0.04 0.08 0.12 0.16 Ce C, and Efficiency
If Reynolds number relate the inertial and viscous forces, which of the following relates the inertial andgravitational forces?A. Froude NumberB. Weber NumberC. Galileo NumberD. Eotvos Number
Vacumm You are designing a vacuum system with a desired equilibrium pressure of 10-7 torr. The turbomolecular pump you are using has a pumping speed of 400 L/s. What is the maximium surface area of the chamber that you can allow, assuming that the outgassing rate per square cm 10-9 torr L/s? Note : total outgassing rate G = ( outgassing rate per area ) * ( area )
. Ooredoo 9:02 PM moodle.nct.edu.om - Private OIL A differential manometer is connected at the two points A and B as shown. At B air pressure is 9.82 N/cm2 (abs), find the absolute pressure at A using the following data. - Specific Gravity of oil as 0.81; - Distance, C = 24 cm; - Distance, D = 107 mm; Distance, E = 0.78 m. X B AAAA! Solution: i) Air Pressure at B (in Pa) = AIR WATER TO WAK 66% E MERCURY Sp. gr. = 13.6
a. the total dynamic head in meters b. the water power in kW c. the motor horsepower if the pump efficiency is 66%