5. A building needs 30 [MWh] electricity annually for appliances, and its annual heating demand is 40 [MWh]. The building is connected to a heating grid (neglect the losses in the grid), where the heat comes from the waste heat from the power plant delivering the electricity to the building. What is the amount of primary energy used annually by the building? The power plant is combustion engine based, and has an electrical efficiency of 0.35 and a thermal efficiency of 0.55. (multiple choice, one answer)

5. A building needs 30 [MWh] electricity annually for appliances, and its annual heating demand is 40 [MWh]. The building is connected to a heating grid (neglect the losses in the grid), where the heat comes from the waste heat from the power plant delivering the electricity to the building. What is the amount of primary energy used annually by the building? The power plant is combustion engine based, and has an electrical efficiency of 0.35 and a thermal efficiency of 0.55. (multiple choice, one answer)

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

Related questions

Q: This is part two of a two-part problem. Water flows through the turbine, condenser, pump and heat…

Q: Mike is trying to determine the amount of work his experimental air compressor is doing. He finds…

Q: A power plant using a CCGT cycle with .4 electrical efficiency 0.6 and with 8 % non-usable heat and…

A: The usable heat delivered by a Combined Cycle Gas Turbine (CCGT) plant can be calculated using the…

Q: Saturated liquid water at 35[bar] undergoes an ideal throttling process to 10[bar]. The quality of…

A: According to the given dataP1=30 barP2=10 barProcess 1 to 2 is a throttling process.We need to…

Q: A five-cylinder, 3.5-liter SI engine operates on a four-stroke cycle at 2500 RPM. At this condition,…

Q: A heat pump can operate at steady state between a dwelling at 70°F and the outdoor air at 32°F, a…

Q: 8. If the dew point and temperature are both 0°C, and the pressure is 850 hPa, at what rate [K/km]…

Q: 3. 4. A steel bridge span is 100 ft. long at 65°F. How much does its length change when the…

Q: Two components of a steam engine are shown in the figure below. The turbine is adiabatic. a.…

Q: the water level in a PWR must always be above the top of the active core. a. Estimate the decay heat…

A: How much rot heat being produced in a fuel gathering whenever after closure can be determined in two…

Q: In an expansion phase for an existing system Engineers determined that they need Q=1.20 [m^3/s] of…

A: Given Data: Q=1.2 m3/shA=55 mhB=80 mL=1500 mf=0.015Kinlet=0.5kvalve=5.5kbend=0.3kexit=1 To Find:…

Q: five-cylinder, 3.5-liter SI engine operates on a four-stroke cycle at 2500 RPM. At this condition,…

Q: start of Process 3-1) Please answer the following questions. a. For process 1-2 determine the value…

A: (D) To plot the processes on a P−V diagram, you can use the provided information and the calculated…

Concept explainers

Applied Fluid Mechanics

A fluid is a substance that is continuously deformed by the application of shear stress. The rate of deformation of a fluid depends on its viscosity. The fluid tries to flow when it interacts with some other system.

Question

5. A building needs 30 [MWh] electricity annually for appliances, and its annual heating demand is 40 [MWh].
The building is connected to a heating grid (neglect the losses in the grid), where the heat comes from the
waste heat from the power plant delivering the electricity to the building. What is the amount of primary
energy used annually by the building? The power plant is combustion engine based, and has an electrical
efficiency of 0.35 and a thermal efficiency of 0.55. (multiple choice, one answer)
25 [MWh]
57 [MWh]
63 [MWh]
86 [MWh]
177 [MWh]

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

Thermodynamics problem
A pickup truck has a five-liter four stroke cycle, V6, SI engine operating at 2400 RPM. The compressionratio is 10.2:1, the volumetric efficiency is 0.91, and the bore and stroke are related as S=0.92B. Calculate:a. Stroke length [cm]b. Average piston speed [m/s]c. Clearance volume of one cylinder [cm3]d. Air flow rate into the engine [kg/s]
One mole of an ideal gas, initially at 30 [°C] and 1 [bar], is changed to 130 [°C] and 10 [bar] by two different mechanically reversible processes: • The gas is first heated at constant volume until its temperature is 130 [°C], then it is compressed isothermallyuntil its pressure is 10 [bar].• The gas is first compressed adiabatically; then it is heated isobarically to 130 [°C] and 10 [bar]. Calculate Q, W, ΔU, and ΔH in [J] for each case. Take Cp = 5/2R and Cv = 3/2R.
During the isothermal heat rejection process of a Carnot cycle, the working fluid experiences an entropy change of -0.7 Btu/R. If the temperature of the heat sink is 95°F, determine: a) the amount of heat transfer in [kW], b) the entropy change of the sink in [kW/K], and c) the total entropy change for this process. Heat SINK 95 F 95"F Carnot heat engine
Engine Cycle: Our inventor is still trying to design a heat engine that will outperform the Carnot cycle .. Design #801-456 is for an ideal, reversible engine that operates with the cycle shown below (A → B → C → D → A). The engine contains 0.421mol of a gas that has a heat capacity ratio of y = 1.300. Point Pressure [N/m²] Volume [m³] Temperature [K] A 1.05 x 105 0.010 300 B 1.85 x 105 0.010 529 1.85 x 105 0.014 751 D 1.05 x 105 0.014 426 PA B A D V (a) What is the efficiency of this engine cycle? (b) What is the efficiency for a Carnot cycle working between the same maximum and minimum temperatures?
Steam at 1400 kPa and 350°C [state 1] enters a turbine through a pipe that is 8 cm in diameter, at a mass flow rate of 0.1 kg/s−1. The exhaust from the turbine is carried through a 25-cm-diameter pipe and is at 50 kPa and 100°C [state 2]. What is the power output of the turbine?
last 2 digit is 10 A. A heat engine operates between a source temperature of at [500 + last 2 digit of student ID]°C and a sink temperature of [5 + last 2 digit of student ID] °C. If heat is supplied to the heat engine at a steady rate of [0.1 x last 2 digit of student ID] kW, determine the maximum power output of this heat engine. В. A Carnot heat engine receives [500 + last 2 digit of student ID] kJ of heat from a source of unknown temperature and rejects [150 + last 2 digit of student ID] kJ of it to a sink at [last 2 digit of student ID]°C. Determine (a) the temperature of the source and (b) the thermal efficiency of the heat engine.
10
An ideal gas flows through a horizontal tube at steady state. No heat is added, and no shaft work is done. The cross-sectional area of the tube changes with length and this causes the velocity to change. (a) Derive an equation relating the temperature to the velocity of the gas.(b) If nitrogen at 150 [°C] flows past one section of the tube at the velocity of 2.5 [m/s], what is the temperature at another section where its velocity is 50 [m/s]? Let Cp = 7/2R.
In a building located at sea level, air flowing at 6000 lbm/hr is cooled from 80°F drybulb and 75°F wet-bulb to full saturation at the outlet of a cooling coil operating with an apparatus dew point temperature of 55°F. Please determine the following and mark process on a psychrometric chart at sea level a) The amount of water removed in [lbm/hr] b) The amount of latent heat removed in [BTU/hr] c) The amount of sensible heat removed in [BTU/hr] d) The Sensible Heat Factor of the cooling coil e) The cooling coil capacity in [BTU/hr]