Question
Download Solution PDFOne kg of steam sample contains 0.4 kg dry steam, it’s dryness fraction is
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
- Dryness fraction is defined as the ratio of the mass of dry steam and the combined mass of dry steam & mass of water vapour in the mixture. It is denoted by x.
\(Dryness\;fraction\;\left( x \right) = \frac{{mass\;of\;vapour\;\left( {{m_v}} \right)}}{{mass\;of\;vapour\;\left( {{m_v}} \right) + mass\;of\;liquid\;\left( {{m_l}} \right)}}\)
- For saturated liquid x = 0
- For saturated vapour x = 1
- The value of the dryness fraction lies between 0 and 1.
Calculation:
Given:
\(x= \frac{{Mass\;of\;dry~steam}}{{Mass\;of\;dry~steam + Masss\;of\;water\;in\;suspension}} = \frac{{{m_v}}}{{{m_v} + {m_f}}} = \frac{{0.4}}{{0.4 + 0.6}} = \frac{{0.4}}{1} = 0.4\)
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