KERALA UNIVERSITY Class 7 refrigeration and air conditioning Question Paper 2008

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Sample Questions

The following data relate to an air-conditioned space: Outer condition - $38^{\circ} \mathrm{C}$ DBT, $50 \% \mathrm{RH}$ Room condition - $24^{\circ} \mathrm{C}$ DBT, $50 \% \mathrm{RH}$ Sensible heat load ...... 24 kw Least heat load - 6kW By-pass...
The following data relate to an air-conditioned space: Outer condition - $38^{\circ} \mathrm{C}$ DBT, $50 \% \mathrm{RH}$ Room condition - $24^{\circ} \mathrm{C}$ DBT, $50 \% \mathrm{RH}$ Sensible heat load ...... 24 kw Least heat load - 6kW By-pass...
(a) Explain the working of steam jet Refrigeration system.
(b) What are the properties of Ideal Refrigerant- absorbent combination?
(i) Ammonia (R-717) (ii) $\quad \mathrm{CO}_{2}(\mathrm{R}-744)$ (iii) Freon-12 $\left(\mathrm{CCl}_{2} \mathrm{~F}_{2}\right)$