73THERMODYNAMICS 116. At winter design conditions, a house is projected to lose heat at a rate of 60,000 Btu/h. Theinternal heat gain from people, lights, and appliances is estimated to be 6000 Btu/h. If thishouse is to be heated by electric resistance heaters, determine the required rated power ofthese heaters in kW to maintain the house at constant temperature.

Given :- Rate of heat Loss = 60000 Btu/h Internal heat gain = 6000 Btu / h To find :- Required…

Answered: 16. At winter design conditions, a…

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

A heat pump operating at steady state maintains a dwelling at 23°C on a day when the outside temperature is -2°C. Energy is loss by heat transfer from the dwelling at a rate of 22000 J/s while the heat pump's power input is 5kW. a) Determine the coefficient of performance of the heat pump. b) Determine the power input required if it was a Carnot heat pump.
A gas inside a piston-cylinder assembly undergoes a refrigeration cycle consisting of these three processes: Process 1–2: Compression with pV = constant from p1 = 1 bar, V1 = 1 m3, to p2 = 10 bar, V2 = 0.1 m3. Process 2–3: Constant volume heating until p3 = p1. Process 3–1: Constant-pressure, adiabatic expansion. There are no changes in kinetic or potential energy. a) Find the work for process 1–2 in kJ. b) Find the work for process 2–3 in kJ. c) Find the work for process 3–1 in kJ. d) Find the net work for the entire cycle in kJ. e) Find the net heat transfer for the entire cycle, in kJ. f) Find the heat transfer for process 3–1 in kJ. g) Knowing Q12 = –100 kJ, find the heat transfer for process 2–3 in kJ.
A heating system must maintain the interior of a building at TH = 20°C when the outside temperature is TC = 2°C. If the rate of heat transfer from the building through its walls and roof is 16.4 kW, determine the electrical power required, in kW, to heat the building using (a) electrical-resistance heating, (b) a heat pump whose coefficient of performance is 3.0, (c) a reversible heat pump operating between hot and cold reservoirs at 20°C and 2°C, respectively.
A claim states that a heat pump has been invented that requires work to be done on the system of 400kJ and delivers energy to its surrounding by heat transfer of 300kJ. Such device is possible True False
A heat pump is used to maintain the interior of a building at 21 °C. At steady state, the heat pump receives energy by heat transfer from well water at 9°C and discharges energy by heat transfer to the building at a rate of 120000 kJ/h. Over a period of 14 days, an electric meter records that 1490 kW-h of electricity is provided to the heat pump. 1. Draw a schematic diagram(s)
and finally find the volume rate in ft3/day
If H is the work output of a heat engine and Q is the total heat input of an engine, then determine its thermal efficiency.
A central power plant, rated at 500,000 kW, generates steam at 500 K and discards heat to a river at 300 K. If the thermal efficiency of the plant is 80% of the maximum possible value, how much heat is discarded to the river at rated power?
(c) A resistant heater jacket 6.5kW is wrapped around a water bath for 240 minutes to raise the water temperature to the desired temperature level. Determine the amount of electric energy used in both kWh and kJ.
The thermal effiency of a general heat engine is 35 percent, and it produces 60 hp. At what rate is heat transferred to this engine, in kJ/s?
Describe the heat and work are energy transfer mechanisms between a system and its surroundings, and there are many similarities between them?
Define thermal energy reservoir?

SEE MORE QUESTIONS

Recommended textbooks for you

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Control Systems Engineering

Mechanical Engineering

ISBN:

9781118170519

Author:

Norman S. Nise

Publisher:

WILEY

Mechanics of Materials (MindTap Course List)

Mechanical Engineering

ISBN:

9781337093347

Author:

Barry J. Goodno, James M. Gere

Publisher:

Cengage Learning

Engineering Mechanics: Statics

Mechanical Engineering

ISBN:

9781118807330

Author:

James L. Meriam, L. G. Kraige, J. N. Bolton

Publisher:

WILEY

SEE MORE TEXTBOOKS