1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
alukav5142 [94]
3 years ago
13

Bananas are to be cooled from 24°C to 13°C at a rate of 215 kg/h by a refrigeration system. The power input to the refrigerator

is 1.5 kW. Determine the rate of cooling, in kJ/min, and the COP of the refrigerator. The specific heat of banana above freezing is 3.35kJ/kg·°C. (Round the final answers to the nearest whole number and two decimal places, respectively.)
Engineering
1 answer:
Leni [432]3 years ago
3 0

Answer:

a) \dot Q_{L} = 132.046\,\frac{kJ}{min}, b) COP_{R} = 1.467

Explanation:

a) The heat rejected by the bananas is:

\dot Q_{L} = \dot m \cdot c\cdot (T_{f}-T_{o})

\dot Q_{L} = \left(215\,\frac{kg}{h}\right)\cdot \left(\frac{1\,h}{60\,min} \right)\cdot \left(3.35\,\frac{kJ}{kg\cdot ^{\textdegree}C}  \right)\cdot (24^{\textdegree}C-13\,^{\textdegree}C)

\dot Q_{L} = 132.046\,\frac{kJ}{min}

b) The coefficient of performance for the refrigeration system is:

COP_{R} = \frac{\dot Q_{L}}{\dot W}

COP_{R} = \frac{\left(132.046\,\frac{kJ}{min}\right)\cdot \left(\frac{1\,min}{60\,s} \right)}{1.5\,kW}

COP_{R} = 1.467

You might be interested in
A gas metal arc welder is also known as a _____ welder.<br> A) TIGB) GTAWC) GMAWD) Resistance spot
nignag [31]

Answer:

GMAW

Explanation:

It's literally the initials of that type of welding

7 0
3 years ago
What issues does society try to forget in order to not have to deal with them ?
velikii [3]

Answer: Homelessness, Drug addiction, Mental Illness, Climate change.

Explanation:

Society would rather be ignorant to/ ignore all of these realities so they do not have to stop specific behaviors or actually acknowledge other people and help. Sometimes people are so stressed out about their own lives, they can not bare another persons issues. People are ignorant to climate change because correcting it requires massive changes and society is selfish and unwilling to change.

6 0
3 years ago
Though still is on the margins of the global agro-food system, organic farming practices are on the rise in the core. In growing
lisabon 2012 [21]

Answer: composted cow manure

Explanation:

A cow manure consists of high levels of ammonia, pathogens which can harm the plants thus cannot be used as fertilizer. The composted cow manure is a processed fertilizer which is prepared by eliminating the ammonia gas and pathogens. It is prepared by adding up the additional organic matter.

It is an excellent growing medium for the agricultural crops and garden plants as it is a nutrient rich fertilizer. It is mixed into the soil or can be used for top dressing of the agricultural field. It is a kind of organic manure.

4 0
3 years ago
Supercharging is the process of (a) Supplying the intake of an engine with air at a density greater than the density of the surr
iVinArrow [24]

Answer:

a)supplying the  intake of an engine  with air at a  density greater  than the density  of the surrounding  atmosphere

Explanation:

Supercharging  is the process of  supplying the  intake of an engine  with air at a  density greater  than the density  of the surrounding  atmosphere.

By doing this , it increases  the power out put  and increases the  brake thermal  efficiency of the  engine.It also  increases the  volumetric efficiency of the  engine.

So the our  option a is  right.

4 0
3 years ago
A rectangular workpiece has the following original dimensions: 2a=100mm, h=25mm, and width=20mm. The metal has a strengh coeffic
Elena-2011 [213]

Answer:

See attachment for detailed answer.

Explanation:

Download pdf
4 0
3 years ago
Other questions:
  • Which conditions are required for nuclear fusion to begin
    8·1 answer
  • How was math used to determine new origami crease plans?
    10·1 answer
  • According to the article "Edward R. Murrow: Inventing Broadcast Journalism," how did Murrow perceive the threat of Adolf Hitler?
    9·1 answer
  • Write a single statement that prints outsideTemperature with 2 digits in the fraction
    8·1 answer
  • The inner surface of a hollow cylinder is subjected to tangential and axial stresses of 40,000 and 24,000 psi, respectively. Det
    9·1 answer
  • 1. What's the maximum overall length of the part?<br> 2. What material is used to fabricate the part
    5·1 answer
  • Ohm's law states that the current (I) in amps equals the voltage (E) in volts decided by the resistance (R) in ohm's. If you con
    15·1 answer
  • How do guest room hotel smoke alarms work and differ then regular home versions?
    10·2 answers
  • How many different powerball combinations are there
    7·1 answer
  • Which of following is not malicious ?<br> Worm<br> Trogan Horse<br> Driver<br> Virus
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!