HW4 - Lani Alo

Hello Sir,Good Morning.I have a question in my homework related thermodynamics lesson. The following below is my question. Please advice. Thank you. Regards,Irfan An air conditioning system is used to keep the house at 65°F when the outside temperature is 85°F. The house gets heat through the walls and windows at a rate of 810 Btu/min, and the rate of heat generation inside the house from occupants, lights, and equipment is 120 Btu/min. Determine the minimum power input required for this air conditioning system.

(English Unit) A 100-pound meat is moved to the cold storage room. During preparation for storage, the meat may warm up to 45°F. That means the meat must be cooled to 32°F before it will begin to freeze. The average latent heat of fusion amounts to about 90 Btu/lb for meat. After freezing, the meat is subcooled to the quick-freeze temperature of 14 oF. The meat has a specific heat below and above freezing point of 0.7 and 0.4 Btu/ lb-oR, respectively. Find the total heat removed from cooling BTU.

Need correct solution , Strictly don't copy. [Answer:50kW] (1)Carnot Refrigerators and Heat Pumps A completely reversible refrigerator is driven by a 10 kW compressor and operates with thermal energy reservoirs at 250 K and 300 K . Calculate the rate of cooling provided by this refrigerator.

Hi, can you please help me with these two questions? I would like to understand what is happening through the schematics first before moving on to the substantive equations.

Please explain

Use Matlab

How much ice (by mass) at a temperature of -19.9 degrees Celsius must be added to 325g of liquid water at a temperature of 60.1 degrees Celsius in order for the final temperature of both to reach 21 degrees Celsius. c of ice=2100 J/kg/C c of water=4190 J/kg/C Latent heat of fusion of water=3.34E5 J/kg/C a. .115kg b. 12kg c. 5 lbs d. .191kg

In an absorption refrigerator, the energy driving the process is sllPplied not as work, but as heat from a gas flame. (Such refrigerators commonly use propane as fuel, and are used in locations where electricity is unavailable. *) Let us define the following symbols, all taken to be positive by definition:                     Qf = heat input from flame                      Qe = heat extracted from inside refrigerator                      Qr = waste heat expelled to room                      Tf = temperature of flame                                         Te temperature inside refrigerator                                           Tr = room temperature Explain why the "coefficient of performance" (COP) for an absorption refrigerator should be defined as Qc/Qf.

In an absorption refrigerator, the energy driving the process is sllPplied not as work, but as heat from a gas flame. (Such refrigerators commonly use propane as fuel, and are used in locations where electricity is unavailable. *) Let us define the following symbols, all taken to be positive by definition:                     Qf = heat input from flame                      Qe = heat extracted from inside refrigerator                      Qr = waste heat expelled to room                      Tf = temperature of flame                                         Te temperature inside refrigerator                                           Tr = room temperature Use the second law of thermodynamics to derive an upper limit on the COP, in terms of the temperatures Tf, Te, and Tr alone.

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

This is one whole question  can you please help me

Part I : Analysis of heat exchangers in engineering applications(max. 5 pages)Select any thermal energy system you are interested. Describe the system and statehow the system works. The system should have at least one heat exchanger.Analyse the design of the heat exchangers and their functions in the system. Part Iand Part II are connected. Select a system you are able to complete the exergyanalysis in Part II.Part II: Exergy analysis & performance optimisation of heat exchangersfor a thermal energy system (max. 5 pages)Perform exergy analysis and performance optimization of the thermal energy systemin Part I. For the above question, the thermal energy system i have chosen is a steam rankine cycle, so for part II, i would like exergy analysis and performance optimistaion to be done 3 times over for a steam rankine cycle, show full working calculations for each and explanations. Provide references for any values used.

Wind power is defined as the use of air flow through wind turbines to provide the mechanical force to generate electricity. Wind power is an alternative to burning fossil fuels, and is renewable and produces no greenhouse gas emissions during operation. Modern horizontal-axis wind turbines often use three blades. Theoretically, the maximum power P (unit: watts) that a three-blade wind turbine can extract from the wind power can be calculated as: P = pAv³C₁. . (Equation 1) where p is the air density (kg/m³), A is the sweep area of the turbine (m²) and can be calculated from the length of the turbine blades, and v is the wind speed (m/s). Cp is the power coefficient that is unique to each turbine type. This coefficient represents the amount of kinetic energy from the wind that is captured by the turbine. From the Betz's limit law we know that the best power conversion possible is Cp,max = 0.59. Part 1 Given the following data: Blade length /= 50 m Air density p= 1.5 kg/m³ Power…

V:01 Expert Q&A Done Question 1: In your own words, write down the differences between thermodynamic and heat transfer. (3 Marks) Question 2: Estimate the heat loss per square metre of surface through a brick wall 0.5 m thick when the inner surface is at 400 K and the outside surface is at 300 K. The thermal conductivity of the brick may be taken as 0.7 W/mK. (2 Marks) Question 3: A furnace is constructed with 0.20 m of firebrick, 0.10 m of insulating brick, and 0.20 m of building brick. The inside temperature is 1200 K and the outside temperature is 330 K. If the thermal conductivities are as shown in the figure below, estimate the heat loss per unit area. (5 Marks) 1200 K 330 K Insulating brick X-0.10m k= 0.21 Ordinary brick X=0.20 m Fire brick X= 0.20 m k= 1.4 k= 0.7 (W/mK)

[MO31] THERMODYNAMIC CYCLES It is proposed to build a 1000 MWelectric power plant with steam as the working fluid. The condensers are to be cooled with river water. The maximum steam temperature is 550 C, and the pressure in the condensers will be 10 kPa. Estimate the temperature rise of the river downstream from the power plant. A. AT = 4.9 deg C Power B. AT = 3.9 deg C plant C. AT = 2.9 deg C D. AT = 1.9 deg C Discharge Intake 60 m- 8 m deep River mean speed 10m/minute

Answer the following questions fully