HVAC Blog

 In HVAC systems, the "Delta-T phenomenon" with respect to chillers typically refers to the difference in temperature (Delta-T) between the chilled water supply and return as it relates to the performance of the chiller unit. This phenomenon can affect the efficiency and effectiveness of the chiller system. Here are some key points: 1. Delta-T Variations : If the Delta-T is lower than expected, it may indicate that the chiller is not removing heat from the chilled water as efficiently as it should. This can result from issues such as fouled heat exchangers, low refrigerant levels, or improper chiller operation. 2. Efficiency Concerns :A reduced Delta-T can lead to decreased chiller efficiency, as the chiller may have to work harder to achieve the desired cooling effect. This can result in higher energy consumption and operational costs. 3. Monitoring and Optimization : HVAC professionals often monitor Delta-T closely as part of routine chiller maintenance. They may adjust sys...

  Chill ers vs direct expansion There are a few key differences between chill ers and direct expansion ( DX ) systems that should be considered when selecting a cooling system for your facility . Ch ill ers use a refriger ant to transfer heat from the water being cooled to the air around the ch iller unit . DX systems use a direct expansion of refriger ant in the coils to transfer heat directly from the air to the refriger ant . Ch ill ers are typically more energy efficient than DX systems and can provide a higher level of cooling capacity . Chill ers also typically have a longer lifespan than DX systems . DX systems are typically less expensive to install than chill ers and can be used in smaller spaces . DX systems also typically have a shorter lifespan than chill ers . When selecting a cooling system for your facility , consider the energy ef...