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Slav-nsk [51]
3 years ago
13

A heat pump is used to warm a building in the winter. This system implements an ideal vapor-compression cycle with R-134a as the

working fluid. The cycle operates between 200 kPa and 800 kPa, with a mass flow rate of 0.02 kg/s. Determine: (a) the heating load that can be met kW (b) the power input required for this system kW (c) the coefficient of performance (d) the warmest outside temperature at which this particular cycle is unable to operate ∘C
Engineering
1 answer:
Marrrta [24]3 years ago
5 0

Answer:

See attachment for detailed answer.

Explanation:

Download pdf
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Answer:

Have the power company install insulated sleeves (also known as “eels”) over power lines.​

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A heat engine that receives heat from a furnace at 1200°C and rejects waste heat to a river at 20°C has a thermal efficiency of
viktelen [127]

Answer:

second-law efficiency  = 62.42 %

Explanation:

given data

temperature T1 = 1200°C = 1473 K

temperature T2 = 20°C  =  293 K

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solution

as we know that thermal efficiency of reversible heat engine between same  temp reservoir

so here

efficiency ( reversible ) η1 = 1 - \frac{T2}{T1}      ............1

efficiency ( reversible ) η1  = 1 - \frac{293}{1473}  

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second-law efficiency = \frac{thernal\ efficiency}{0.801}

second-law efficiency = \frac{50}{0.801}  

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3 0
3 years ago
To measure the voltage drop across a resistor, a _______________ must be placed in _______________ with the resistor. Ammeter; S
gulaghasi [49]

Answer:

The given blanks can be filled as given below

Voltmeter must be connected in parallel

Explanation:

A voltmeter is connected in parallel to measure the voltage drop across a resistor this is because in parallel connection, current is divided in each parallel branch and voltage remains same in parallel connections.

Therefore, in order to measure the same voltage across the voltmeter as that of the voltage drop across resistor, voltmeter must be connected in parallel.

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We are given a CSP with only binary constraints. Assume we run backtracking search with arc consistency as follows. Initially, w
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We are given a CSP with only binary can concentrate assume we run backtrackingSearch with ARC
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sergejj [24]

Answer:

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Explanation:

yw

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