An old V-8 spark-ignition engine has a 4-in-diameter cylinder and a 4- in-long stroke. The intake conditions are atmospheric (70 F and 14.7 psia). The engine has a compression ratio of 9. (See Appendix 1A to review the geometrical relationships.) The peak cycle temperature is 4000 F. Assuming constant specific heats and using the Otto … Read more
A Carnot refrigerator removes energy at a rate of 300 Btu/hr from a low-temperature thermal reservoir at −160 F. The high-temperature reservoir for the refrigerator is the atmosphere at 40 F. A Carnot engine operating between a reservoir at 1140 F and the atmosphere (40 F) drives this Carnot refrigerator. A. At what rate must … Read more
An evaporative cooler for an automobile consists of an 18-in-long by 8- in-diameter cylinder that hangs on the outside of the car. At 55 mph the cooler processes 4500 lbm of dry air per hour. During desert driving the air is at 100 F with a 10% relative humidity. Inside the cooler, the air passes … Read more
Wridemy Plagiarism Free Paper Writing Website. Visit us here Wridemy Part 1 (500-750 words)In preparation for the Bovar Company’s year-end audit, your manager has asked you to create a document about auditing principles and the code of conduct to share with the rest of the internal auditors. You know that the Institute of Internal Auditors … Read more
Cooling water from an internal combustion engine is to be cooled from 150 to 110 F. The pressure is 14.7 psia. Compare the following three methods with respect to air and/or city water required (lbm /1000 gallons of engine cooling water): A. Heat transfer to city water. The city water temperature increases from 70 to … Read more
Humid air enters a dehumidifier with an enthalpy of 21.6 Btu/lbm of dry air and 1100 Btu/lbm of water vapor. There is 0.02 lbm of vapor per pound of dry air at entrance and 0.009 lbm of vapor per pound of dry air at exit. The dry air at exit has an enthalpy of 13.2 … Read more
Create a budget worksheet with all the line items mentioned below for each month. Using the table at the end of this document.Your income is fixed.So you will need to make choices on your spending. Remember to take yearly amounts and divide them by 12 in order to get monthly figures.Your goal for this exercise: … Read more
1. Moist air at 100 F, 20 psia, and 40% relative humidity is flowing in a pipe. Determine (a) the dew-point temperature, (b) the humidity ratio, and (c) the adiabatic-saturation temperature. 2. The temperature and adiabatic-saturation temperature for a room of moist air are measured to be 35°C and 20°C, respectively. A. Determine the humidity … Read more
A belt filter press housed in a mobile trailer was used to test the dewaterability of an anaerobically digested sludge.The effective width of the belt was 0.50 m.The operating data were a sludge feed rate of 4.5m3/hr, polymer dosage of 0.45 m3/hr containing 0.20% powdered polymer by weight,and wash-water flow of 1.07 1/s.Based on laboratory … Read more
At an existing treatment plant, the practice of hauling away liquid digested sludge for spreading on farmland is being replaced by belt filter presses to dewater anaerobically digested sludge prior to stockpiling and spreading on agricultural land.The design sludge production, which is the average quantity during the maximum month of the year plus 25% for … Read more