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r-ruslan [8.4K]
3 years ago
12

Description: An apartment building has a pumped ring main that circulates hot water at 75 C through insulated 40 mm pipe with he

at loss of 17 Watts/metre. At each apartment, this hot water is mixed with cold water to a delivery temperature of 50C? One of the sub-questions provides extra info: It takes 0.00119 kWh/degree/litre to heat water from 15C to 50C.
My problem:

With typical water-efficient shower and taps, typical Melbourne usage of hot water is 44 litres/day/person. For typical occupancy of 1.8 people, what is the effective efficiency of this hot water distribution system (for simplicity assume the existing heating system feeding the distribution system is 100% efficient).? Note that this efficiency calculation ignores the efficiency of production of hot water.

If anyone can help me or if anyone has any idea that would be great!

Thanks :)
Engineering
1 answer:
Ratling [72]3 years ago
7 0

Answer:

hfhhfhff

Explanation:

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Why does voltage have so many names
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The Reynolds number for flow over a fixed horizontal flat plate is constant throughout its length. a) True b) False
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4 years ago
A unidirectional E-Glass fiber-epoxy composite material contains 61% by volume E-Glass fibers stressed under isostrain condition
zalisa [80]

Answer:

The total load carried by the fiber will be "98%".

Explanation:

The given values are:

V_{f}=0.61

V_{m}=1-V_{f}

     =1-0.61

     =0.39

E_{f}=10 \ Mpa

\sigma_{f}=0.35 \ Mpa

E_{m}=0.45 \ Mpa , \sigma_{m}=9\times 10^{-3} \ Mpa

As we know,

⇒  E_{e}=fE_{f}+mE_{m}

On putting the estimated values, we get

⇒       =0.61\times 10+0.39\times 0.95

⇒       =6.27 \ Mpa

Now,

⇒  \sigma_{c}=f\sigma_{f}+m\sigma_{m}

On putting the estimated values, we get

⇒       =0.61\times 0.35+0.39\times 0.009

⇒       =0.217 \ Mpa

Therefore,

The load carried by fiber,

=\frac{f\sigma_{f}}{\sigma_{c}}

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=0.98 i.e., 98%

4 0
4 years ago
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