Home
Back
Formula Used:
| From: | To: |
The Unbound Weight of Moisture is the amount of moisture in kg present in the wet solid which exerts a vapor pressure equal to that of pure water for the system. It represents the moisture that is not chemically bound and can be easily removed through drying processes.
The calculator uses the formula:
Where:
Explanation: The Unbound Moisture Content is defined as the ratio of the weight of moisture exerting vapour pressure equal to that of pure water at the same temperature to the weight of dry solid.
Details: Accurate calculation of unbound moisture is crucial for drying operations in various industries including food processing, pharmaceuticals, and chemical manufacturing. It helps determine the amount of moisture that needs to be removed and optimize drying processes.
Tips: Enter the Unbound Moisture Content as a decimal value (e.g., 0.28 for 28%) and the Dry Weight of Solid in kilograms. Both values must be positive numbers.
Q1: What is the difference between bound and unbound moisture?
A: Unbound moisture exerts vapor pressure equal to that of pure water, while bound moisture exerts lower vapor pressure due to chemical bonding or physical entrapment.
Q2: How is unbound moisture content measured experimentally?
A: It can be determined through drying experiments where the moisture content is measured at different time intervals until constant weight is achieved.
Q3: What factors affect unbound moisture content?
A: Material properties, temperature, humidity, and the physical structure of the solid material all influence unbound moisture content.
Q4: Can this calculator be used for all types of materials?
A: The calculator uses the general formula, but specific materials may have different moisture behavior that should be considered.
Q5: How does temperature affect unbound moisture calculations?
A: While the basic formula doesn't include temperature, vapor pressure (and thus what constitutes "unbound" moisture) is temperature-dependent in practice.