Homework_2-resubmit

! Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. A Carnot heat pump is to be used to heat a house and maintain it at 25°C in winter. On a day when the average outdoor temperature remains at about 2°C, the house is estimated to lose heat at a rate of 55,000 kJ/h. The heat pump consumes 5.15 kW of power while operating. HP 25°C 2°C 55,000 kJ/h How long did the heat pump run on that day?

A house is heated and maintained at 20 °C by a heat pump. Part A Part B Based on these results, would you recommend heat pumps at locations with a severe climate? Match the words in the left column to the appropriate blankes in the sentences on the right. Reset Help mild 1. Given that a real heat pump is significantly efficient than a Carnot heat pump, the increases advantage of a heat pump over electric heating rapidly when the outside temperature becomes really low. less more 2. As the COP decreases, the heating power decreases 3. A heat pump is ideal for a climate. severe Submit Request Answer

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…

pt) You have two solar hot water collectors on the roof, each is 4 feet by 8 feet. Assume the panels are 50% efficient. The panels receive about 300 BTU per hour per square foot, for a total of 5 hours. You have a hot water tank connected to the panels filled with 600 pounds of water, starting in the morning at 60 deg F. What will the water temperature be at the end of the 5 hours?

QUESTION 4 1. This question is about the section titled, Airplanes. Which of the following statement is NOT true according to this reading? The design known as "winglets" was shown to reduce fuel use by 5%. How an airplane operates with respect to taxi or take-off has an insignificant impact on the airplane fuel use. C C Jet biofuel is currently expensive and limited in supply. The goal of the Carbon Offset and Reduction Scheme of International Aviation (CORSIA) is

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.

0 Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. A Carnot heat pump is to be used to heat a house and maintain it at 25°C in winter. On a day when the average outdoor temperature remains at about 2°C, the house is estimated to lose heat at a rate of 55,000 kJ/h. The heat pump consumes 4.8 kW of power while operating. 55,000 kJ/h Determine the total heating costs, assuming an average price of $0.11/kWh for electricity. The total heating cost is $40.33 (You must provide an answer before moving to the next part.)

Answer question 2 based on the results 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= 80698000 Btu Oil BTU                = 71512440 Btu   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 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…

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…

Q1: a - An electric home stove with 3 burners and microwave is used in preparing a meal as follows. Burner 1: 20 minutes Burner 2: 40 minutes Burner 3: 15 minutes . Microwave: 30 minutes. If cach burner is rated at 1.2 kW and the oven at 1.8 kW, and electricity costs 1000 (IQ =Iraqi Dinar) per kWh, calculate the cost of electricity used in preparing the meal? 4 marks

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

An engineer was tasked with evaluating a heat and power generation unit for an aluminium smelting plant. The management intends to expand the production facilities to meet growing demand for aluminium. The plan involves increasing the energy intensive smelting line from the present single line to three lines by end of 2022. To support the expansion plan, the company plans to install a self-sufficient power generation unit. Details of the energy requirement and the proposed power generation unit is given the following Table. Item Power requirement per smelting processing line 0.6 MW Proposed power generation unit: Supplier • System Description Mitsubishi Heavy Industries Ltd Steam power plant (Carnot heat engines principles) 35% • Overall thermal efficiency Prepare a mini technical power evaluation report for the above project. Your report should include the following items and in the following order: a. Total power (W) and heat (Q) requirement.

Good day. I am trying to review for examinations and require assistance for these questions... Thermal Energy: Find BTE and ITE using the BHP AND IHP that you have calculated for number 4 and number 5. Assume you have a gasoline that burns for 7 gal/hr with a heat value of 18000 BTU    Mechanical Efficiency: Find the Mechanical Efficiency of an engine with a 6-cylinder engine which a bore of 6.28 inches and a stroke of 3.5 inches with an IMEP of 400 psi and BMEP of 300 psi at 1825 rpm.    Volumetric Efficiency: What is the volumetric efficiency of a four-cylinder aircraft engine which has a bore of 4 inches and a length of stroke of 6 inches and 30 cu in. volume of charge     **Would appreciate a detailed explanation. Thank you so much.

17.  I need the Equations for the nozzle of gas turbine engine of an airplane. (Balance of energy and mass) everything

1. Residual oil, with a heating value of 18,480 BTU/bm, is used as a fuel in a power plant which produces 947,870 BTU/s of electricity. The overall efficiency of the power plant is 52 Determine the: a. Heat input, in BTUs b. Daily fuel consumption, in lbm C. Dimensions of the cylindrical storage (assuming length is equal to the diameter), in ft. d. Heat rejected the environment, in BTU/s. The density of the oil is 62 ID/ft.

Required information Problem 07.025 - DEPENDENT MULTI-PART PROBLEM - ASSIGN ALL PARTS NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Refrigerant-134a enters the coils of the evaporator of a refrigeration system as a saturated liquid-vapor mixture at a pressure of 140 kPa. The refrigerant absorbs 200 kJ of heat from the cooled space, which is maintained at -10°C, and leaves as saturated vapor at the same pressure. Problem 07.025.c - Total entropy change of the process Determine the total entropy change for this process. The total entropy change for this process is kJ/K.

3) When a person enters his house, which is completely closed in summer, he sees that the temperature is 34°C. After turning on the air conditioner, the temperature of the house becomes 22 °C within 15 minutes. Since the efficiency coefficient of the air conditioning system is 3.2, a) the electrical power drawn by the system, b) heat dissipated to the environment, and c) Assuming that it works 8 hours a day and the electricity price is 0.6 TL per kWh, find its cost for 4 months. Assume that the entire mass inside the house is equivalent to 1000 kg of air. For air, take Cv = 0.73 kJ/kgK, Cp= 1.0051 kJ/kgK.

as an aerospace engineering student, where do you utilize flight simulators?

b) Determine the energy transport rate for the system shown in Figure below. Fuel flow Top heat loss Exhaust flow Epuet15,000 Btu/min Eethaut500, Btu/min 180,000 Btu/h System boundary Engine-generator set 200. hp Bottom heat loss 54,000 Btu/h 50.0 hp Electrical workout

Q2/A: What are the technologies that promote the sustainable energy?

Fill the balks with the correct word/words d-For turbulent flow, Reynold Number is e- A pump is a rotodynamic pump that converts mechanical energy to hydraulic pressure energy. f- turbine can be used in rivers, man-made channels, tidal waters. g- The First Law of Thermodynamic state that__ h- i- is a change in the system from one equilibrium state to another. transfer heat from low to high temperature stages by using mechanical work. j- Adiabatic process means

3. A heat engine operating between a geothermal steam source at 205°C and a riv- er at 18°C achieves an efficiency of 22%. What percentage of its theoretical max- imum efficiency is it achieving?

It takes 104 hours to install a heating system in an office building. Theinstallers have already worked 36 hours. How many more hours are neededto finish the installation?

LP Available Courses Video Tutorials us / Calamba-3rd Year Level 2nd Semester 55215 ME 3214 Principles of thermodynamics / Prelin 14 Combustion Engineering A Carnot engine operates between temperature limits of 1200 °K and 400 °K and using 0.4 kg of air. The pressure at the beginning of heat addition is 1500 kPaa and at the end of heat addition is 750 kPaa. Determine the heat added O a. 55.9 kJ/kg O b. 95.5 kJ/kg O C. 95.5 kJ O d. 55.9 kJ 立

ASSIGNMENT Issue Date: 14.12.2020 Date of submission: 21.12.2020 1. a) In a certain process, 675 J of heat is absorbed by a system while 290 J of work is done on the system. What is the change in internal energy for the process? Determine also the net work done and change in internal energy if the processes are assumed to be

In company that designs road cars and heavy trucks, it important to make the proper selection of the engines. Your part as a system energy engineer is to make a proper selection between an engine operates on Otto cycle/gasoline engine or Diesel cycle/diesel engine. Your head of department asked you to provide a detailed technical report that shows your selection for engine to be used with heavy truck vehicle. This is best achieved by performing the following tasks: Section.1: 1. Which engine does operate at lower rpm and has higher air-fuel mass ratio? 2. Which engine does burn fuel more completely? 3. Which engine has lower fuel cost? 4. Explain what compression ratio for Otto and Diesel cycles means 5. Explain what cut-off ratio for Diesel cycles means 1:06 pm 6. Explain the limitations of SI engines in terms of their ability to operate at much higher compression ratios. What is this limitation called? 7. Provide general plot(s) for thermal efficiency, 7 vs compression ratio, r for…

Question 3 a) The details of travel time and capacity of different links in a portion of a city road network is as given in Table 1. Assign a traffic volume of 15,000 pcu per hr from node A to node I by multiple route assignment technique. Table 1: Travel time and capacity Link Travel time in minutes Practical capacity in pcu/hr A-B 6000 A-C 5000 A-D 5000 B-F 6000 C-E 5000 D-G 5000 E-H 5000 F-I 6000 G-H 5000 H-I 10000 wwNN 2 2 3 3 3 2 N33 N 2 2

Which of the following are correct and valid for the Kelvin-Plank statement? Oc Any device O a. It is impossible for any device O e. It is possible for any O b. It is impossible O d. No heat engine can have a Of. Kelvin- Planck Og. Kelvin- O h. It is impossible Planck that statement of the to construct statement to construct a device that of the a device that violates thermal device that the efficiency of 100 that second second Kelvin- Planck operates in a cycle and produces no effect other than operates in a cycle and produces no effect other than operates law is law is operates on a cycle to receive positive statement, and a percent, or as for a negative statement, and a on a statement also cycle to receive power plant to operate, the working fluid heat from violates a single reservoir and heat negative statement cannot be positive the transfer of heat from a higer- temperature body to a lower- the from a statement the transfer Clausius single reservoir and of heat from a lower- can…

7. A diesel electric plant supplies energy for Meralco. During the 24 hour period, the plantconsumed 200 gallons of fuel at 28 degree Celsius and produced 3930 KW-hr.Industrial fuel used is 28 degree API and was purchased at 5.50 php per liter at 15.6degree celsisu. What is the cost of the fuel be to produce 1 KW-hr?

A freezer uses 100 kJ of electrical energy to move 330 kJ of thermal energy from inside the freezer to outside. We can determine how much the room temperature increases when 1 kg of ice freezes. a. How much thermal energy must be removed from 1 kg of 0oC water to turn into 0oC ice? (the latent heat of fusion of water is 320 kJ/kg)  b. How much electrical energy is used to freeze the ice? c. What is the total energy, including waste heat, exhausted by the freezer into the kitchen? d. A kitchen contains 43 kg of air (specific heat capacity of 1.0 kJ/kgK). Before the ice freezes, the air temperature is 20oC. After the ice freezes, at which temperature will the air be: 22oC, 25oC or 30oC?

Project 2 As part of your work-study program at the HTU, you successfully got selected to be trained at the Rehab power station for electrical energy generation. In the first week of your CO-OP journey the head of the department asked you to do the following tasks: Task 1 Write down the energy balance equation from the first law of thermodynamics for a closed system and then put the equation for an open system. Explain the difference between the two equations. Task 2 Apply the Steady Flow Energy Equation to compressor, turbine, boiler, pipe, mixing chamber and condenser. Task 3 Discuss the following scenarios: a) Consider an air compressor that operate under the same conditions over long period of time. How would you compare the volume flow rates of the air at the inlet and exit of the compressor? b) Do you think that the temperature of air will rise as it is compressed by an adiabatic compressor? Explain c) Do you think that the temperature of air will drop as it undergoes a steady…

Read the questions carefully before answering. Box or indicate your final answers when solving and draw your diagrams cleanly. Use the steam tables provided and DO NOT ROUND the values from the steam table. Write down the values taken from the steam table. Steam undergoes an Isentropic process where it is initially at 1.30MPa and200C then it expands to a pressure of 0.75MPa, thus becoming wet steam. What is the dryness of the steam and the change in enthalpy for the process?