1. What is a Heat Pump Cooling Temperature Output Calculator?

Definition: This calculator determines the temperature change of air output from a heat pump's cooling system based on heat transfer rate, air mass flow, and specific heat capacity.

Purpose: It helps HVAC professionals and engineers evaluate heat pump performance and design appropriate cooling systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \Delta T \) — Temperature change (°F)
• \( Q \) — Heat transfer rate (BTU/h)
• \( \dot{m} \) — Air mass flow rate (lb/h)
• \( c_{air} \) — Specific heat capacity of air (BTU/lb·°F)

Explanation: The heat removed is divided by the product of air mass flow and specific heat to determine the temperature change.

3. Importance of Temperature Change Calculation

Details: Proper temperature change estimation ensures efficient system operation, proper cooling capacity, and energy efficiency.

4. Using the Calculator

Tips: Enter the heat transfer rate in BTU/h, air mass flow rate in lb/h, and specific heat capacity (default 0.24 BTU/lb·°F for dry air). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical specific heat capacity for air?
A: Dry air has c_air ≈ 0.24 BTU/lb·°F, but this increases with humidity.

Q2: How do I find the air mass flow rate?
A: Measure volumetric flow (CFM) and multiply by air density (≈0.075 lb/ft³ at standard conditions).

Q3: What affects the heat transfer rate?
A: Heat pump capacity, refrigerant properties, and temperature differentials.

Q4: Is this formula valid for heating mode?
A: Yes, but ΔT would represent temperature increase rather than decrease.

Q5: How does humidity affect the calculation?
A: Humid air has higher specific heat, resulting in smaller ΔT for the same Q.