A water jet consumes "3X50"W for 126 hours a week. What is the energy consumed (kWh) for a one-year period? Your answer What is the utility energy charge for this period at a rate of P750/KVWH.* Yout answer What is the energy cost savings for this period if the water jet is switched off 6 hours a dav? 1 vear=365.25 days

A water jet consumes "3X50"W for 126 hours a week. What is the energy consumed (kWh) for a one-year period? Your answer What is the utility energy charge for this period at a rate of P750/KVWH.* Yout answer What is the energy cost savings for this period if the water jet is switched off 6 hours a dav? 1 vear=365.25 days

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter2: Matter And Energy

Section: Chapter Questions

Problem 27RQ: How many Btu/h would be produced in a 12-kW electricheater?

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A water jet consumes 450 W for 2 hours a day. (a) What is the energy consumed (kWh) for one year period? 1 year = 362.25 days. (b)What is the utility energy charges for this period at a rate of 600/kWh pesos. (c) What is the energy cost savings for this period if the water jet is switched of 8 hours a day?
3. Please calculate the annual electricity production of a wind farm with 20 turbines. The annual mean wind speed is 7 m/s and diameter of the blades is 20 m. If we assume power consumption of a person is 3,000 kWh, about how many people will this energy support? Annual electricity production (KWh) = K Vm³ At T Where: - - - K = 3.2 (factor based on turbine performance) Vm= annual mean wind speed (m/s) At = swept area of turbine (m2) T = number of turbines Suitable for medium- to large-scale wind turbines (> 200 m2 swept area)
AE ll ll A:£0 docs.google.com/forms When a stationary mass of gas was compressed without friction at constant pressure its initial state of 0.8 m3 and 0.105 MPa was found to change to final state of 0.40 m3 and 0.105 MPa. There was a transfer of 85 kJ of heat from the gas during the process.How much did the internal energy of the gas change ? * 1 Add File Derive the law pv^y = constant * 1 Add File Вack Next Never submit passwords through Google Forms. This form was created inside L Iniversity of Al-
2) The energy consumed by a shower for 30 days is 22kwh. It is known that the resistance of the showerhead is 20 ohms and that its nominal current is 15A. So, what is the time in minutes that the shower was turned on during this period?
Show your complete solution for each problem. Only the final answer in your calculation should be rounded off to two decimal digits. Box your final answer. 1. The increase in the specific internal energy is 33.8 BTU/Ibm in a reciprocating compressor draws 40 lbm/min of air whose density is 0.074 lbm/ft³ and discharge it with a density of 0.311 lbm/ft³. At the suction, the pressure is 18 lb:/in² and discharge 88 lb:/in². If the changed in kinetic energy was neglected, determine the work on the air in horsepower (hp).
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 .
A photovoltaic system is installed. It is determined that the capacity factor of the installation is 21% over the course of a year. In that year it produced 7.73 MWh. What is the size of the installation (based upon a 365-day year)?
Problem 8The demand for electric power is usually much higher during the day than it is at night, andutility companies often sell power at night at much lower prices to encourage consumers to usethe available power generation capacity and to avoid building new expensive power plants thatwill be used only a short time during peak periods. Utilities are also willing to purchase powerproduced during the day from private parties at a high price. Suppose a utility company is selling electric power for $0.07/kWh at night and is willing to pay $0.15/kWh for power produced during the day. To take advantage of this opportunity, an entrepreneur is considering building a large reservoir 100 m above the lake level, pumping water from the lake to the reservoir at night using cheap power, and letting the water flow from the reservoir back to the lake during the day, producing power as the pump–motor operates as a turbine–generator during reverse flow. Preliminary analysis shows that a water flow…
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An electric resistance heater is used to provide space heating at an efficiency level of 100%. The electricity is sold at $0.13 per kWh. Question: How much money is needed if 1137.8 MBH is demanded? Hint: 1 MBH equals 1,000 btuh
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