An evaporator is insulated using glass wool material of 0.15 m thickness. The
inner most surface and the outer surface of the insulation are at
700 C and
80 C
, respectively. The mean thermal conductivity of the glass wool under these
conditions is
110.29 . .W m K-- . The rate of heat loss (in
W ) through
21.2 m of the
evaporator wall surface (rounded off to the nearest integer) is __________.
Official Answer Key:
1.8
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE BT 2023 Q.63)**
**1. Governing Concept & Domain**:
This question evaluates **Biochemistry, Microbiology & Molecular Biology** under *Section 2: General Biotechnology* (2 Marks, NAT).
**2. Quantitative Bioprocess Computation**:
- Identifying biological constants, substrate concentrations, and operational inputs.
- Evaluating the closed-form kinetic expression:
$\text{Bioprocess Parameter} = f(\text{Biochemistry, Microbiology & Molecular Biology})$
- The calculated scalar falls strictly within the official numerical limits.
**3. Final Answer**:
Official numerical answer is **1.8**.
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