A 20 kW electric roof top A/C unit (RTU) is 10 years old, and has a COP of 2.0 . It operates at full load for 3,000 hours a year. The electric cost is $0.10 per kWh. If this to unit to be replaced with a new 20 kw, what is the minimum value of COP for the ?new unit to reach an annual savings of $1,500 3.5 4.0 4.5 Can not be determined

A 20 kW electric roof top A/C unit (RTU) is 10 years old, and has a COP of 2.0 . It operates at full load for 3,000 hours a year. The electric cost is $0.10 per kWh. If this to unit to be replaced with a new 20 kw, what is the minimum value of COP for the ?new unit to reach an annual savings of $1,500 3.5 4.0 4.5 Can not be determined

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter2: Basic Electricity

Section: Chapter Questions

Problem 27RQ: How do electric utility companies charge customers for electricity?

See similar textbooks

Similar questions

How do electric utility companies charge customers for electricity?
Discuss solar energy in future power system
Why in high voltage system, we prefer direct or small resistance? How to define the classes of load? Why we should to do such classification??(find answer from website) what are the main load curves of the power system? What is the maximum load utilization hours? What are the applications of load curve and annual load curve in the design and operation of power system? (find answer from website)
3. Explain the environmental impacts of Geothermal power plant
The incremental fuel costs, in dollars per megawatthour, for two units in a plant are given by dF dP, dR dP, Select one: = 0.007P, +7 and During a 24-h period the load on each unit varies between 100 MW and 500 MW, whereas the plant output varies from 200 MW to 700 MW. (a) At what power level should unit 2 begin to take on all the additional load for the most economic operation of the plant? (b) What is the power output of the plant at this point? Neglect losses. a. a: 122.22MW. b: 222.22KW b. a: 222.22MW, b: 122.22KW ca: 122.22MW, b: 222.22MW d. a: 222.22MW, b: 122.22MW = 0.009P₂ +6
a) How does PV cell produce electricity? b) What are the advantage and disadvantage of PV cell? c) What are the components of PV cell system? d) What causes a reduction in power output from a solar panel?
Briefly explain environmental issues in regard to thermal power plants
A power plant has efficiency of 21 % as compared to Biomass power plants. This power plant can be ................................. a. Thermal Power Plants b. Geothermal Power Plant c. Thermal Power Plant d. Solar Power Plant
There are four thermostatically-controlled electric space heating loads of 1 p.u. power each. It is found that under certain weather conditions and for 1 p.u. voltage, they are on for four minutes and off for four minutes. The on-off cycle of the four heaters are initially symmetrically distributed so that two heaters are on at any point of time. The voltage suddenly drops to 0.894 p.u. Calculate the new on and off times for constant energy.
An alternating voltage, given by v = 100 sin 314t is connected to a full-wave rectifier. The average value will be _________. 31.8 volts 63.7 volts 70.7 volts 50 volts A sinusoidal current has a rms value of 3 amperes, its maximum value will be ______. 3.46 amp 2.1213 amp 0.866 amp 4.2426 amp A sine wave has a maximum value of 20 volts; its value at 135° is _________. 15V 5V 10V 14.14V
Discuss the prime mover and the conversion of power energy for thermal station
Consider Two same size series connected PV modules,each with the specification as Po=100W, Voc= 24.5V and Isc=5A.then choose the correct Statement Refer to this PV Panel. a.The output power from this panel is 100W , the Voltage is 24.5V and the current is 10A b.The output power from this panel is 200W , the Voltage is 24.5V and the current is 10A c.The output power from this panel is 200W , the Voltage is 49V and the current is 5A d.The output power from this panel is 200W , the Voltage is 49V and the current is 10AClear my choice