1. What is the Flow Rate of Water Formula?

Definition: This calculator determines the mass flow rate of water based on heat transfer rate, specific heat capacity, and temperature change.

Purpose: It helps engineers and technicians calculate water flow requirements in heating/cooling systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( ṁ \) — Mass flow rate (pounds per hour)
• \( Q \) — Heat transfer rate (BTU per hour)
• \( c \) — Specific heat capacity (BTU per pound per °F)
• \( \Delta T \) — Temperature change (°F)

Explanation: The heat transfer rate is divided by the product of specific heat and temperature change to determine the required flow rate.

3. Importance of Flow Rate Calculation

Details: Proper flow rate calculation ensures efficient heat transfer, prevents system overload, and maintains optimal performance in HVAC and process systems.

4. Using the Calculator

Tips: Enter the heat transfer rate in BTU/h, specific heat capacity (default 1.0 BTU/lb·°F for water), and temperature change in °F. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is specific heat capacity?
A: The amount of heat required to raise 1 pound of a substance by 1°F. For water, it's approximately 1 BTU/lb·°F.

Q2: How does temperature change affect flow rate?
A: Greater temperature changes require less flow for the same heat transfer, while smaller ΔT requires higher flow rates.

Q3: When would I use a different specific heat value?
A: When working with fluids other than water (e.g., glycol mixtures have lower specific heat).

Q4: How do I find the heat transfer rate (Q)?
A: It's typically provided by system specifications or can be calculated from equipment capacity.

Q5: Can this be used for cooling systems?
A: Yes, the same formula applies for both heating and cooling applications.