Solutions to Written Assignment 10_11_29_2017.pdf

# 700 2 1 superheated vapor 26734 27646 26734 09481

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??𝐚?? ? { 700 𝑘?? 𝑠 2 = 𝑠 1 Superheated Vapor { ? ? = 267.34 𝑘? 𝑘𝑔 + (276.46 − 267.34) 𝑘? 𝑘𝑔 (0.9481 − 0.9185) 𝑘? 𝑘𝑔 ∗ ? (0.93782 − 0.9185) 𝑘? 𝑘𝑔 ∗ ? = ???. ?? 𝒌? 𝒌? 𝒔 ? = ?. ????? 𝒌? 𝒌? ∗ ?

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??𝐚?? ? { 700 𝑘?? sat liquid {? ? = ??. ?? 𝒌? 𝒌? ??𝐚?? ? { Isenthalpic Throttling {? ? = ℎ 3 = ??. ?? 𝒌? 𝒌? 𝐂?? ? = 1 − ℎ 4 2 − ℎ 1 = (244.55 − 88.82) 𝑘? 𝑘𝑔 (273.29 − 244.55) 𝑘? 𝑘𝑔 = ?. ?? The Coefficient of Performance of the Refrigerator is 5.42. Figure 2 highlights the ideal refrigeration compression cycle on a T-S graph. Figure 2: Ideal Vapor compression cycle for a refrigerator. Solution: Q 2b As COP R has been determined, the power input required to the compressor can also be determined. 𝐖𝐨?𝐤 ????𝐢??? = Useful Work Done COP R = 40 tonnes of refrigeration ∗ 3.52 𝑘𝑊 1 tonne of refrigeration 5.42 = ??. ?? 𝒌𝑾 The Compressor Draws 25.95 kW of power to maintain the cooling load
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• Spring '18
• Staff
• Vapor-compression refrigeration, Vapor-Compression Refrigeration Cycle, enthalpy departure chart, ideal vapor-compression refrigeration

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