If an energy storage system is capable of providing 10 kW at 80 % efficiency, the total energy capacity required to provide 8 hours of operation is
Answer: 100kWh
10 KW or 10,000 joules / sec
in 8 hour total energy
8 hour = 28800 sec
= 10,000 * 28800
= 2.88*10^8 joules
this is 80% energy
efficiency = 80%
so, energy =
= (2.88*10^8 / 80 )*100
3.6*10^8
in Kwh
1 Kwh = 2.8*10^-7
3.6*10^8*2.8*10^-7
= 100.8 KWh
any query please comment
if satisfied please rate it thanks
If an energy storage system is capable of providing 10 kW at 80 % efficiency, the...
(b) The daily design load curve of a residential area is given in the table below. The hydropower facility providing the power has an effective head of 15 m and a plant efficiency of 0.85. What is the minimum daily flow (m3/s) that could meet the demand? What is the minimum required storage capacity (within-day storage) to meet the peak load? If the daily flowrate were 320m3/s, what would be the minimum required storage capacity? Would there be some water...
Question #5: (10 marks) Design a standalone PV system with battery storage to provide energy fora 13.8 ac appliance Refrigerato cabin with the following appliances 150 100 65 TV, active mode 24 TV,standby mode Satellite, active mode Satellite, standby Microwave 21 17 16 21 0.1 Total (ac power) de appliance 60 10 de air conditioner 10 Total (depower) Total demand wh In your design, determine the type of the inverter, the battery and PV module from the list below and...
An energy storage system uses the excess power available
overnight to pump water 50 metersup a hillfrom alake and into a
reservoir. During the day, when extra power is required, the water
is then released through a turbine and generateselectricity1. In
this system, as shown in the figure, a pump with an efficiency of
80% is used to transfer the water up the hill.
a.How much energy is required to move the water up the hill
[kJ/kg]?.
b.How much power...
Assume that 5 kW air conditioner would run 80 % of the time (80% duty cycle) during the peak hour and might be limited by utility remote control to a duty cycle of 65%. Determine the following: i) The of minutes of operation denied at the end 1 hour of control of the unit. ii) The amount of reduced energy consumption during the peak hour if such control is applied simultaneously to 100 000 air conditioners throughout the system. iii)...
A concentrating solar collector system, as below, provides
energy by heat transfer to a power cycle at a rate of 2 MW. The
cycle thermal efficiency is 36%. Determine the power developed by
the cycle, in MW. What is the work output, in MW*h, for 4380 hours
of steady-state operation? If the work is valued at $0.08/kW-h,
what is the total dollar value of the work output?
answer all i paid my money
Describe the energy storage technologies (8 marks) A hydropower storage system to provide 2GWe of dispatchable power for twelve hours is to be built between two reservoirs with a difference in elevation of one mile. Determine the minimum volume of water assuming a margin of safety of 50% and an average water depth of twenty feet in each reservoir. State all assumptions made. (4 marks)
Assume that 5 kW air conditioner would run 80 % of the time (80% duty cycle) during the peak hour and might be limited by utility remote control to a duty cycle of 65%. Determine the following: i) The of minutes of operation denied at the end 1 hour of control of the unit. ii) The amount of reduced energy consumption during the peak hour if such control is applied simultaneously to 100 000 air conditioners throughout the system. iii)...
Problem 2) A heat pump cycle whose coefficient of performance is 2.5 delivers energy by heat transfer to a dwelling at a rate of 20 kW. (a) Determine the net power required to operate the heat pump, in kW. (b) Evaluating electricity at $0.08 per determine the cost of electricity in a month when the heat pump operates for 200 hours. Problem 3) A power cycle receives energy by heat transfer from the combustion of fuel at a rate of 300 MW. The thermal efficiency...
A 10 kW photovoltaic system generates 15,000 kWh per year. Its initial installed cost is $50,000 and it is financed at 2%. The annual operation and maintenance cost is $200. The system is expected to last 30 years and its replacement cost will be $17,000. There are no incentives. Calculate the cost of energy generated by this system.
A motor which is used to rotate a pump consumes 20 kW energy. Its efficiency is 85%. a. What is the power delivered to the pump by the motor? b. The pump whose pipe diameter is 10 cm delivers the water at a mass flow rate 3 kg/s. What is the velocity of water? Assume density of water is 1000 kg/m3.