A Carnot heat engine has an ideal efficiency of 34% and produces 25 kW of output power. At what rate (MJ/h) must it discharge heat when operating at full power?

1a. What is thermodynamics system?

b. Briefly explain (i) control mass system

(ii) control volume system

c. Comment briefly on control mass system and control volume system at Steadey state

d.

The inner and outer surface temperatures of a glass window 5 mm thick are 15 and 5°C. The thermal resist- ance of the glass window due to conduction is Rt,cond = 1.19 × 10−3 K/W. What is the rate of heat loss through a 1 m × 3 m window? What is the thermal conductivity of the glass?

Problem 1: For a city at 42 deg N latitude, 93 deg W longitude, determine the Local Civil Time (CT) for the sunset on May 21 for central standard time.

Your company has been awarded a contract for 5-story addition on top of an existing 10-story hospital tower at a Cancer Center located in one of the most populated areas of Dallas, Texas. The existing hospital building is beyond 100% occupancy. The company was hired under a design-build contract to complete the $220 million project. Wind-load testing will be conducted. The wind-resisting system will be modified to redistribute loads on the mat foundation. High-strength concrete will be utilized for the addition's floors and columns (to reduce the load). The new mechanical level will be relocated from an upper floor to the floor just above the hospital's existing roof level. Glass fiber reinforced concrete cladding matching the original building's precast concrete façade (but at about one-quarter the weight) is specified in the design. The duration of the project is three-year.

Can you guys help me find the mechanical and electrical system hazards in this problem?!

And what would be the control strategies for them.

When compressed liquid properties are unavailable for a substance, it is acceptable to use the ____ values at the same temperature

Select one:

a. saturated liquid

b. saturated vapour

c. critical

d. triple line

Which model, exponential failure rate or Weibull failure rate is suitable to capture the wearout
process of a pump bearing? (justify). Using MS Excel and simulated data, estimate the
reliability a pump bearing for every month over 10 years of operations (upload the MS
Excel file on the D2L along with your answer sheet).

Select one major aspect of human physiology in the selected readings for this module that particularly interests you. Analyze and evaluate it, then creatively apply it to aviation safety. Explain both how and why you believe it could negatively impact safety in some aspect of aviation operations that also particularly interests you, such as flight operations, maintenance operations, or air traffic control operations.

Consider the following boiler hazards:

1- High steam pressure in the boiler exceeding design limits

2- High steam temperature in the boiler

3- Low water level in the boiler

4- High water level in the boiler

5- High pressure of hot gases inside the furnace

6- Low pressure of hot gases inside the furnace

7- Flammable and toxic gases build up in flues

8- Explosive gas mixture in the furnace or flues

Consider each of the above hazards separately. For each of the hazards give the following details:

a) Suggest the suitable safety control function

b) Draw a simple block diagram of this control function using manual drawing tools or computer software (do not copy and paste the images, no freehand drawings)

c) Explain the working of the above control function in your own words

d) Explain how the above control function protects against the respective hazard

(Five marks for each hazard. Total marks for practical: 40)

When length the of crank and connecting rod is changed (i.e crank of length is changed by keeping connecting rod length constant and in other case connecting rod length is changed by keeping the crank length constant) what implications does it have on the reciprocating engine?

Fluid Mechanics

why peak sun hours is used in estimation the size of many solar thermal and power systems ?explain

When you use a numerical method like the finite element method, you divide a large body into an equivalent system of smaller bodies called elements. This is done because using an analytical method on the larger body may require a solution to a boundary value partial differential equation; a task that might be difficult or impossible to solve. The question: why does dividing a large object into smaller objects help at all? If you divide a rectangle into tiny rectangles and ask each of those tiny rectangles the same question that you were asking the large rectangle (which would require the solution to a boundary value differential equation), what good have you done? Please explain.

A vessel initially containing 1 kmol of CO and 4.76 kmol of dry air forms an equilibrium mixture of CO₂, CO, O₂, and N₂ at 2800 K, 1 atm. Determine the equilibrium composition.