A company owns a refrigeration system whose refrigeration capacity is 200 tons (1 ton of refrigeration...

A company owns a refrigeration system whose refrigeration capacity is 200 tons (1 ton of refrigeration = 211 kJ/min), and you are to design a forced-air cooling system for fruits whose diameters do not exceed 7 cm under the following conditions: The fruits are to be cooled from 28°C to an average temperature of 8°C. The air temperature is to remain above -2°C and below 10°C at all times, and the velocity of air approaching the fruits must remain under 2 m/s. The cooling section can be as wide as 3.5 m and as high as 2 m. Assuming reasonable values for the average fruit density, specific heat, and porosity (the fraction of air volume in a box), recommend reasonable values for

(a) the air velocity approaching the cooling section,

(b) the product-cooling capacity of the system, in kg·fruit/h, and

Solutions

Expert Solution

Solution:

please give positive ratings if you understood the answer thank you.

samet mamat answered 2 hours ago

Next > < Previous

Related Solutions

The capacity of a propane vapor-compression refrigeration system is 8 tons. Saturated vapor at 0°F enters...

The capacity of a propane vapor-compression refrigeration system is 8 tons. Saturated vapor at 0°F enters the compressor, and superheated vapor leaves at 120°F, 180 lbf/in.2 Heat transfer from the compressor to its surroundings occurs at a rate of 3.5 Btu per lb of refrigerant passing through the compressor. Liquid refrigerant enters the expansion valve at 85°F, 180 lbf/in.2 The condenser is water-cooled, with water entering at 65°F and leaving at 80°F with a negligible change in pressure. Determine (a)...

Consider a two-stage cascade refrigeration system operating between the pressure limits of 1.2 MPa and 200...

Consider a two-stage cascade refrigeration system operating between the pressure limits of 1.2 MPa and 200 kPa with refrigerant R717 (Ammonia) a as the working fluid. The refrigerant leaves the condenser as a saturated liquid and is throttled to a flash chamber operating at 0.45 MPa. Part of the refrigerant evaporates during this flashing process, and this vapor is mixed with the refrigerant leaving the low-pressure compressor. The mixture is then compressed to the condenser pressure by the high-pressure compressor....

A hydrostatic system consists of 0.1 moles of an ideal gas whose specific heat capacity at...

A hydrostatic system consists of 0.1 moles of an ideal gas whose specific heat capacity at constant volume, ??, is equal to 3?2 where R is the gas constant equal to 8.31 J mol–1 K–1. Its initial pressure and volume are 32 Pa and 8 m3. In its final state, the pressure is just 1 Pa and its volume increases eightfold. The particular thermodynamic process can be represented on an indicator diagram as a straight line joining the initial and...

1. XYZ Manufacturing Company buys 50 tons of coal per month. The price of 50 tons...

1. XYZ Manufacturing Company buys 50 tons of coal per month. The price of 50 tons of coal can vary from month to month according to the table shown below: Price of 50 Tons of Coal Probability $1500 0.20 $2000 0.50 $2500 0.30 How much should XYZ budget for coal in 2020? Your answer should be an integer. 2. Replacement times for computer displays players are normally distributed with a mean of 7.1 years and a standard deviation of 1.4...

A company manufactures computers, whose hard disk has a capacity of 20 GB and others of...

A company manufactures computers, whose hard disk has a capacity of 20 GB and others of 30 GB. In the previous month, 35% of the computers sold were those with a 20 GB hard drive. Of buyers of computers with a 20 GB hard drive, 45% buy those with 356 MB of RAM, while 30% of buyers of computers with a 30 GB hard drive also do so. (a) What is the probability that a randomly selected computer will have...

A refrigeration system contains an adiabatic compressor with Refrigerant-134a as working fluid. Inlet conditions (state 1)...

A refrigeration system contains an adiabatic compressor with Refrigerant-134a as working fluid. Inlet conditions (state 1) are 140 kPa and -100C and the exit state is 1.6 MPa and 800C (state 2). The changes in KE and PE are negligible. Determine (a) actual exit specific enthalpy in kJ/kg, (b) exit specific isentropic entropy in kJ/lg.K and (c) efficiency of the compressor in %.

Question 1 1.1 Company A owns 60% of Company B and Company B owns 30% of...

Question 1 1.1 Company A owns 60% of Company B and Company B owns 30% of the ordinary shares of Company C Discuss the theory that refers to this situation and the degree of influence and control that Company A has over both the companies. 1.2 Company X owns 40% of Company Y and Company Y owns 30% of the ordinary shares of Company Z Discuss the theory that's refers to this situation and the degree of influence and control...

Consider an M / M / 1 queueing system with capacity N = 1, arrival rate...

Consider an M / M / 1 queueing system with capacity N = 1, arrival rate λ = 0.2 customers per minute, and service rate µ =0.3 customers per minute. Let X(t) be the number of customers present at time t. a) Suppose that X(0) =0. Calculate P{X(1) = 0} and P{X(10) = 0} b) Suppose that X(0) =1. Calculate P{X(1) = 0} and P{X(10) = 0} c) Could you have predicted the difference between the answers in part a,...

1. Consider an object on a spring of k=200 N/m whose position is given by x=(5.00...

1. Consider an object on a spring of k=200 N/m whose position is given by x=(5.00 cm)cos(9.90 rad/s). Find: (a) the maximum speed of the object and when this maximum speed first occurs after t=0, (b) the maximum of the acceleration of the object and when the maximum of the magnitude of the acceleration first occurs after t=0, (49.5cm/s 490 cm.s^2), (c) the amplitude and period of motion, (d) the position of the block at t=1.0s, (d) the maximum kinetic...

1. Suppose the recycling company is required, by contract, to process exactly 10,000 tons of plastic...

1. Suppose the recycling company is required, by contract, to process exactly 10,000 tons of plastic in a year. Because the company cannot change its facility size within a year, it must choose the optimal staffing level to process this amount. Assuming that the company is a short-run profit-maximizing company, it must be the case that in a year, the company hires the number of workers that Choose one: A. minimizes the short-run amount of time required to process 10,000...

Subjects