Homework_2-resubmit

XYZ Company Ltd has consulted your firm Zig-Zag Energy over an intention to generate electricity in Ghana. Being the senior project engineer for Zig-Zag Energy, management has asked you to prepare a detailed technical report in respect to the project. a) Discuss the major factors to take into consideration when consulting on such projects.                                                                                                           A tank containing air is stirred by a paddle wheel. The work input to the paddle wheels is 2000KJ and the heat transferred to the surrounding from the tank is 6000KJ. b) Determine the change in the internal energy of the system                                              There has been a sharp differences between the board of Blue-Blue Energy over which of the energy sources (hydroelectric power plant-HEP and Coal fired plant) is best for power generation. As an energy expert, you were confronted by the debating faction for your opinion. You…

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7. In the summer it tends to become quite hot and humid in the Guelph area. Many home owners purchase dehumidifiers to remove moisture from the air. Excessive moisture can create problems with dampness in basements, so it is a good idea to keep the situation under control, Dehumidifiers work on the principle that when air is cooled, its ability to hold moisture decreases Therefore, the dehumidifier consists of a cabinet-like structure containing a refrigeration coll. As the room air blows over this coil. it is cooled to a temperature that is below its dew point. Moisture then condenses out of the air and is collected in a bucket (or directed by a hose to a floor drain), A curious home owner wonders how much water will be collected in a 12 hour period. He empties the bucket at the start of the test and comes back exactly twelve hours later to see how much water has been collected. Calculate the amount of water that would be collected in a twelve-hour period if 1.15 cubic metres per…

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Pls.answer thank you! A classroom that normally contains 40 people is to be air-conditioned with window air-conditioning units of 5 KW cooling capacity. A person at rest may be assumed to dissipate heat at a rate of about 360 KJ/hr. There are 10 light bulbs in the room, each with a rating of 100 watts. The rate of heat transfer to the classroom through the walls and the windows is estimated to be 15,000 KJ/hr. If the room air is to be maintained at a constant temperature of 21°C, determine the number of window air-conditioning units required.

Problem Statement = You install a heat pump to heat a cottage during the winter using the outside air as the heat source. You wish to maintain the interior temperature of the cottage at 22°C. A simplified model of the heat loss through the walls indicates that heat will need to be supplied at a rate of 0.14(Tinterior - Texterior) where Q is the rate at which heat must be supplied to the cottage (in kW), Tinterior is the interior air temperature (in C), and Texterior is the exterior air temperature (in C). You have a 1kW electric motor available to run the heat pump. What is the coldest winter day when the heat pump will be able to keep up to the heating demand? Answer Table Stage Description Your Answer Correct Answer * Due Date Grade (%) Part Weight Attempt Action/Message. Type 1 Coldest outdoor temperature (°C) Nov 7, 2024 11:59 pm 0.0 1 1/5 Submit * Correct answers will only show after due date has passed.

Based on the table and the correct answers provided in Parts A-D, Are any of the claimed efficiencies impossible?

Question 6 Compare the carbon emissions per MJ to heat household water using the following two energy systems: a) A 25% efficient coal-fired power plant delivering electricity to a 99% efficient electric water heater. Assume LHV carbon intensity of coal is 25.8 gC/MJ. b) A new 50% efficient natural gas-fired combined cycle power plant to a 99% efficient electric water heater. You must calculate the LHV carbon intensity of natural gas. Assume 100% methane and ideal conditions. Assume 5% losses in electrical transmission lines and 90 MJ of fuel input to each system.

Questions: 1. b. As the power plant engineer, you are asked by the power plant manager to design a new steam-based power plant with a net power output target of 200 MW with a thermal efficiency of 40%. Thermodynamics calculation should be conducted for the known condition illustrated in Figure 1. Boiler P₁ = 8.0 MPa Saturated vapor Condenser Pump Turbine of Vapor and Gas] Cooling water 8.0 MPa 0.008 MPa tw. Saturated liquid at 0.008 MPa Figure 1. Illustration of steam turbine system and its T-S diagram a. Calculate the back work ratio, the system's mass flow rate, and the cooling water's mass flow rate. What kind of efforts should be conducted if the plant manager asks you to increase the system's efficiency to 50% ? Explain and provide proof in the form of calculation! VIOL

Solve question 2 based on the answer of question 1.  You have a natural gas furnace in your home that used 78,500 cubic feet of natural gas for heating last winter. Your neighbor has a furnace that burns heating oil and used 516 gallons of heating oil last winter. You can convert the natural gas and heating oil consumption data into Btu to determine which home used more energy for heating. Natural gas BTU:  1,028 Btu per cubic foot Oil BTU: 138,590 Btu per gallon   Natural Gas BTU= 80,698,000  Oil BTU                = 71,512,440    The home that used a natural gas furnace used more energy for heating. 2.- You need a new furnace for your home, and you are comparing systems that use natural gas and heating oil. One factor to consider is the cost of the fuel. You can compare the price of the fuels on an equal basis by dividing the price per unit of the fuels by the Btu content per unit of the fuels to get a price per million Btu. Assume Natural gas price = $10.50 per thousand cubic…

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Please help answer the question regarding heat transfer. I tried solving it and came up with 152.56 oC but it says that it is incorrect. Please show how to get the correct answer. Thank you.

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bliuzodt to mopolb 9. If machine parts are degreased by means of kerosene as shown in the diagram, how much kerosene make-up is needed per day? How much kerosene has to enter the degreasing vat per day? There are about 3 lb of grease per 100 lb of machine parts, and 60 tons of machine parts are processed each day. Five thousand pounds of kerosene (the 10% solution) are carried away by the machine parts each day but drip off and are caught and put back in the degreasing vat. Two hundred pounds of the 10% solution are lost each day from the vat by evaporation, spillage, or by being carried away.

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