University of the Americas Puebla
HEAT FLOW UNIT OPERATIONS
America Oros Ferreira 175858
Ulf Oliver Cordero 175272
Isabela Arellano González 175433
Miranda Escamilla Pérez 176642
Third partial exam.
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operaciones unitarias de transferencia de calor, Summaries of Chemistry
operaciones unitarias de transferencia de calor
Typology: Summaries
2022/2023
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University of the Americas Puebla
HEAT FLOW UNIT OPERATIONS
America Oros Ferreira 175858
Ulf Oliver Cordero 175272
Isabela Arellano González 175433
Miranda Escamilla Pérez 176642
Third partial exam.
Introduction and context of the problem.
Objectives.
Solution methodology.
Identify system, borders, and surroundings.
Image 1: Heat exchanger system
General and energy balances
- Enthalpy balance:
𝑠
𝑒
- Hot and Cold stream balance:
𝐻
𝐻
𝐻𝑜𝑢𝑡
𝐻𝑖𝑛
𝐶
𝐶
𝐶𝑜𝑢𝑡
𝐶𝑖𝑛
- Real heat:
𝐻
𝐻
𝑝𝐻
𝐻𝑜𝑢𝑡
𝐻𝑖𝑛
𝐶
𝐶
𝑃𝐶
𝐶𝑜𝑢𝑡
𝐶𝑖𝑛
The calculation of this balance enables us to accurately determine the quantity of thermal energy that a single current
is exchanging.
- Maximum heat:
𝑚𝑎𝑥
𝑚𝑖𝑛
𝐶𝑖𝑛
𝐻𝑖𝑛
The maximum heat allows us to know the amount of thermal energy that is transferred from one stream to another
since it considers the inlet temperatures for both streams; This value together with the real heat allows us to know the
efficiency of the exchanger for heat transfer.