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 ...
With his brace, Cristiano Ronaldo gets closer to 1,000 goals.
11:27 PM on November 29, 2024
Al Nassr defeated Damac 2-0 thanks to a brace from Cristiano Ronaldo, securing third place in the Saudi league, five points behind leaders Al Ittihad, captained by Karim Benzema. The Portuguese player is getting closer to the historic 1,000-goal mark after reaching 915 goals in his career.
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An invincible Cristiano
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After Abdelkader Bedrane handballed inside the box, the Portuguese legend scored the first goal with a penalty in the seventeenth minute. Cristiano Ronaldo steadily approached the milestone of 1,000 career goals with his successful spot-kick, showcasing his amazing scoring record.
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