Delta T (ΔT) in HVAC Systems – Complete Explanation In HVAC, Delta T (ΔT) means: Difference between two temperatures Formula: ΔT=T1−T2 Where: ΔT = Temperature difference T₁ = First temperature T₂ = Second temperature Why Delta T is Important in HVAC Delta T tells us: • How much cooling or heating is happening • Whether equipment is working properly • Energy efficiency of system • Water flow and air flow condition • Coil performance • Chiller efficiency In HVAC mainly two Delta T are used: • Water Side Delta T • Air Side Delta T 1. Water Side Delta T (Chilled Water / Hot Water) This is the temperature difference between: • Supply water temperature • Return water temperature Usually used in: • Chillers • FCU • AHU • Heat exchangers Chilled Water Delta T In cooling system: • Chiller sends cold water → called CHWS (Chilled Water Supply) • Water absorbs room heat • Warm water returns → called CHWR (Chilled Water Return) Formula: ΔTwater = Treturn−Tsupply Example 1 – Normal ...
Programmable Logic Controller (PLC) Basics Explained
PLC Basics Explained
What is a PLC?
A Programmable Logic Controller (PLC) is a type of computer commonly used in industrial automation. PLCs can control various devices and processes in manufacturing and production environments. They are robust, highly reliable, and designed to withstand harsh conditions.
Key Features of a PLC
- Real-time operation
- Easy programming and reprogramming
- Modular structure
- Ability to control multiple inputs and outputs
- Robust and durable for industrial environments
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