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For a residential building with 5000W of heating demand, estimate: a)     the number of required vertical ground heat...

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Question

Civil Engineering

For a residential building with 5000W of heating demand,estimate:

a)     the number of required verticalground heat exchangers (borehole heat exchangers) to fulfill theheating demand (round up the number).

b)    the heat exchange rate for each ground heatexchanger if boreholes are 30m deep (W/m).

Design parameters and assumptions:

The circulating fluid in the pipes is water with a temperaturedifference of 5°C between inlet and outlet pipes (Tout -Tin= 5°C) and Reynolds number of 5,000. Pipe outerdiameter is 25mm with 1.8mm wall thickness. Circulating fluiddensity is 1000 kg/m3, the heat capacity is 4180 J/(kgK)and dynamic viscosity of 0.001 Pa.s.

Answer & Explanation Solved by verified expert
4.2 Ratings (934 Votes)
Ans GivenHeating demand 5000 WTemperature difference T 5oC or 278 KReynold number Re 5000Pipe outer diameter d 25 mmWall thickness t 180    See Answer
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