20. Determine COLD & HOT capacity of storage tank (m3), for a hospital building having 100 occupants in 300 bed. (Cold water rate demand 950 L/bed/day & Period storage for one day)
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- In the United States, energy for household heating is generally sold using English units, e.g., therm, gal, and cord. A house in Wisconsin uses 1200 therms of thermal energy during the heating season. Calculate the cost of fuel if the furnace uses (a) natural gas with an efficiency of 70%; (b) No. 2 fuel oil, efficiency 65%; (c) kerosene, efficiency 99.9% (unvented); and (d) wood with l5% moisture with an efficiency of 50%. Use the data in Tables 2.2, 2.7, and 2.13. The efficiencies are based on the HHV. Assume the cost of natural gas is $8/MBtu, the cost of No. 2 fuel oil is $3/gal, the cost of kerosene is $3.50/gal, and the cost of wood is $100/cord. Assume the bulk density of cord wood is 30 lbm/ft3 .18 - A cylindrical tank with a diameter of 20 cm and a height of 50 cm was filled with water to a height of 30 cm. If the tank is rotated about the vertical axis of symmetry at a constant speed of 21 rad/s, what will be the pressure difference between the bottom center and bottom edge of the tank? a) 1750 Pa B) 1045 Pa NS) 3327 Pa D) 2205 Pa TO) 1125 PaQUESTION 3Discuss the five characteristics of a System.
- Residual oil, with a heating value of 18,480 BTU/lbm, is used as a fuel in a power plant which produces 947,870 BTU/s of electricity. The overall efficiency of the power plant is 52%. Determine the: a. Heat input, in BTU/s b. Daily fuel consumption, in lbm c. Dimensions of the cylindrical storage (assuming length is equal to the diameter), in ft. d. Heat rejected to the environment, in BTU/s. The density of the oil is 62 lbm/ft3A steam boiler has the following data: - Steam output: 8000 lb/hr - Steam pressure: 135 psia - % moisture: 1% - Feedwater temperature: 120 F - Boiler Surface Area: 1330 ft2 Determine: a. Factor of evaporation b. Equivalent evaporation c. Boiler horsepower d. Boiler rating19 - The surface tension of soapy water at 20 °C is σs =0.028 N/m. What would be the effective pressure inside a soap bubble with a diameter of 4 cm at this temperature? a) 4.5 Pa B) 15 Pa NS) 20 Pa D) 5.6 Pa TO) 10 Pa
- Specific gravity of fluid is 15. Determine its weight per unit volume? 0.147 N/m^3 147105 N/m^3 147.105 N/m^3 not sufficient information 19614 N/m^3solve. heat transfer1. Residual oil, with a heating value of 18,480 BTU/bm, is used as a fuel in a power plant which produces 947,870 BTU/s of electricity. The overall efficiency of the power plant is 52 Determine the: a. Heat input, in BTUs b. Daily fuel consumption, in lbm C. Dimensions of the cylindrical storage (assuming length is equal to the diameter), in ft. d. Heat rejected the environment, in BTU/s. The density of the oil is 62 ID/ft.
- SUMMARIZED IN YOUR OWN WORDS THE RELEVANCE OF IST AND SECOND LAW OF THERMODYNAMICS IN YOUR CAREER AS A CIVIL ENGINEERThe specific heat of air under standard atmosphericpressure, in SI units, is 1003 N · m/ kg · K. The specific heatof air under standard atmospheric pressure, in U.S. Customaryunits (ft · lb /slug · 0 R), is?QUESTION FIVE (a) At a certain location, wind is blowing steadily at 10 m/s. Determine the mechanical energy of air per unit mass and the power generation potential of a wind turbine with 60-m-diameter blades at that location. Take the air density to be 1.25 kg/m3. (b) Consider an alcohol and a mercury thermometer that read exactly 0°C at the ice point and 100°C at the steam point. The distance between the two points is divided into 100 equal parts in both thermometers. Do you think these thermometers will give exactly the same reading at a temperature of, say, 60°C? Explain.(c) Determine the work required to deflect a linear spring with a spring constant of 70 kN/m by 20 cm from its rest position.