1000W electric heater with 85% of efficiency is replaced by a 1000W electric heater with 95% efficiency. if heater is operated in a 8-hour shift for 5 days a week, what is the annual kwh savings?

Q: A heating element of a hot plate on an electric cooking range draws 24 amperes from 240 V mains. How…

A: Given data: Current, I=24 A Voltage, V=240 V mains. Time t is one hour and 15 minutes.   Find:…

Q: A 60 W bulb is on for 10h. a. What is the energy used in watt-seconds? b. What is the energy…

A: We are authorized to answer one question at a time since you have not mentioned which one you are…

Q: A generating station has an overall efficiency of 15% and 0·75 kg of coal is burnt per kWh by the…

A: The amount of heat generated when unit amount of substance is burnt completely. Fuel efficiency is…

Q: circulating pump consumes 450 W for 24 hr a day. a. Determine the energy consumed for a one-year…

A: In this question , power consumed by circulating pump is given for some time period....We have to…

Q: no. 000 AWG wire is 100 meters long. For no. 000 wire, it has a wire resistance of 0.0618 ohms per…

A: In this question AWG wire is given...We have to find out power loss due to current and due to this…

Q: An electricity supplier company rates its customers as follows: Monthly cost 6 $ 0.02 $ / kWh for…

A: Monthly cost : $ 0.02 $ / kWh for the first 250 kWh 0.07 $ / kWh for each additional kWh total use…

Q: Suppose that the electricity consumption in your home last month was 354 kWh. In your contract with…

A: Given data, Consumed Units=354kWh Rate=11.3 cents per kWh Fixed Charge=$15.63

Q: The voltage across the load in the plant is 240 cos(360 t) while the current is 80 cos(360-pi/3),…

A: Given dataThe voltage across the load is .The current flowing through the load is To find out…

Q: A business uses two 3 kW fires for an average of 20 hours each per week, and six 150W lights for 30…

A: According to the question, it is given that Power P1 = 3 kW Time T1= 20 hours Power P2 = 150 kW Time…

Q: 7. A 100 W incandescent lamp has a resistance when cold (lamp extinguished) that is only 1/12 of its…

A: Given: Power, 100 W Voltage, 120 V To find: a) Lamp current b) Cold resistance c) Instantaneous…

Q: 3. A 2.8-kW electric heater takes 20 min to boil a quantity of water. If this is done once a day and…

A: Given information is written below. Power absorbed by the heater P=2.8 KW. Heating time per day is…

Q: The current passing a 1 kW electric hair dryer is 2.5 A; what is the voltage across the hair dryer…

A: Given: Power rating of dryer, P=1 kW Current, I=2.5 A

Q: a generating station has an overall efficiency of 15% and 0.75% kg of coal is burnt per kwh by the…

A: Given data Overall efficiency = 15% Coal required to produce the 1kwh energy = 0.75 kg

Q: If the temperature is increased by 3 degrees Celsius then efficiency of power output in solar PV…

A:

Q: The maximum power demand of a consumer is 2 kilowatt and the corresponding daily energy consumption…

A: Given, Maximum power demand = 2 kW. Daily energy consumption = 30 units = 30 kWh

Q: 6. A thermal station has an efficiency of 15% and 1-0 kg of coal burnt for every kWh generated.…

A:

Q: The number of revolutions per kw for a  230v, 10A watt- hour meter is 900. On test at half load, the…

A: In this question we will find energy meter error at half load....

Q: A single phase energy meter which is designed to make 120 revolution for one unit of energy. It…

A: A single phase energy meter- 120 revolutions for one unit of energy. Number of revolutions=N,…

Q: (d) In a typical coal-fired power plant, 2,460 kWh of electricity can be produced per ton of coal…

A:

Q: A 700 MW power plant consumes coal containing 1.23x 10^14 Joules of thermal energy every day. What…

A: In this question we will find efficiency of system...

Q: A business uses two 3 kW fires for an average of 20 hours each per week, and six 150W lights for 30…

A: Given,A business uses,Two 3 kW fires for an average of 20 hours each per week, and six 150W lights…

Q: A 100 resistor is connected to a 220 V, 50 Hz ac supply. (a) What is the rms value of current in the…

A: It is given that:

Q: The resistance of a 1 kW electric heater when energized by a 230 V 1-phase AC is A B C 52.9Ω 2302…

A: Given- 1 kW electric heater, P=1 kW=1000 W, Voltage V=230 V, 1-Phase AC, To Find- The resistance R.

Q: 1. A generating station has an overall efficiency of 15% and 0-75 kg of coal is burnt per kWh by the…

A: As per Bartleby guidelines we are allowed to solve only one question, please ask the rest again. I…

Q: The equivalent fuel reserve of a certain country for power generation is 3 x 10 6 MW – year. The…

A: It is given that: Equivalent fuel reserve=QT=3×106  MW-year=3×1012  W-yearPresent peak power…

Q: 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…

A: Given values are =

Q: What is the efficiency of a power plant if the efficiencies of the boiler, turbine and generator are…

A:

Q: How much electric energy in kilowatt – hour is delivered to an electric motor during 10 – hour…

A: In this question we need to find a How much  will you pay  if  the cost is 8 pesos / K – watt hour.

Q: One single page energy meter operating on 230 Volt and 5 ampere for 5 hours makes 1940 revolutions.…

A: Given a single phase energy meter with, Operating voltage, V=230 V. Current, I=5 A. Time, t=5 hr.…

Q: 6. A 20 HP motor operates at full load for 7,000 hours each year at an efficiency of 91%. It is…

A: Given,Old motor -20HP with 91%.New motor -20HP with 93%.

Q: Power factor of an ordinary electric bulb is a. slightly more than unity b. slightly less than unity…

A: Ordinary electric bulb is purely resistive in nature

Q: 24/ Determine the unit of energy if the power is measure in mega watts and the time in minutes. a.…

A:

Q: Energy produced in a power station is 1440 MWh per day. What is the maximum demand of the station if…

A: Given data: Energy produced in power station = 1440 MWh per day Time period = 1 day = 24 hour Load…

Q: Predict power consumption for a month if the temperature is 770F

A: The power system has to transmit power from the generation side to the load side. For this purpose,…

Electrical Heating Unit

The conversion of electrical energy to heat energy is known as electric heating. The heating system that converts the electrical energy to heat energy for various application is called electrical heating unit. Electricity is employed as the firing mechanism in electric heating systems, which transforms electric current to heat. Electric heaters have heating elements in the form of electric resistors.