An exercise room has 6 weight-lifting machines that have no motors and 7 treadmills each equipped with a 2.5-hp (shaft output) motor. The motors operate at an average load factor of 0.7, at which their efficiency is 0.77. During peak evening hours, all 12 pieces of exercising equipment are used continuously, and there are also two people doing light exercises while waiting in line for one piece of the equipment. Assuming the average rate of heat dissipation from people in an exercise room is 600 W, determine the rate of heat gain of the exercise room from people and the equipment at peak load conditions.

An exercise room has 6 weight-lifting machines that have no motors and 7 treadmills each equipped with a 2.5-hp (shaft output) motor. The motors operate at an average load factor of 0.7, at which their efficiency is 0.77. During peak evening hours, all 12 pieces of exercising equipment are used continuously, and there are also two people doing light exercises while waiting in line for one piece of the equipment. Assuming the average rate of heat dissipation from people in an exercise room is 600 W, determine the rate of heat gain of the exercise room from people and the equipment at peak load conditions.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

None
Consider two houses that are identical in size. House 1 has outside walls that were built using a double layer of brick. House 2 has outside walls that were built using a single layer of wood. Discuss and explain which house will be more energy efficient?
Determine the COP of the heat pump.
If the LHV of wood logs is 16 MJ/kg, how much energy is available for 2 kg of wood logs? If I burn all wood logs, what is the maximum energy in the heat I could obtain? If 30% of heat can be changed to electricity, how much electricity will be generated? If the heating value (LHV) of dry wood is 20 MJ/kg, what is the maximum energy 20 tonnes of wood could provide? If 60 % of the heat in wood could be transferred, how much heat can be transferred? If the heating value of coal is 40 MJ/kg, how much energy is available for 10 tonnes of coal? If I burn wood logs (LHV =16 MJ) to obtain the same amount of heat, how much (in tonne) of wood logs do I need to burn?
What types of energy are consumed in Texas? How is this energy used?
Fundamental energy conversion devices of conventional technologies are heat engines, refrigerators, and heat pumps; they either produce or consume work. For these devices a. Show basic operation principles with the simplest schematics which are sufficient for defining the thermal efficiency and COP of the devicesb. Express thermal efficiency and COP of these devices
If the price of electricity is $0.11/kWh, determine the amount of energy and money that will be saved as a result of installing motion sensors. Also, determine the simple payback period if the purchase price of the sensor is $32 and it takes 1 h to install it at a cost of $40.
Work done by the spring force depends on which factors?
Determine the friction contributed by a half-open globe valve if the flow of water through it is at a rate of 2.1 m/s 61.6 J/kg O 20.95 J/kg O 9.58 J/kg O 104.67 J/kg
Please solve it
Energy can be transferred either by heat or work. Consider a room that is heated as a result of solar radiation coming in through the windows. Is this a heat or work interaction for the room? Why?