Keep up with the latest trends in the HVAC industry in 2020 by checking out our calendar of conferences, trade shows, and other events in the industry.
Enthalpy is defined as the amount of internal energy within a system combined with the product of its pressure and volume. When dealing with the term in the HVAC industry, we usually assume that the process is at a constant pressure and, as such, the change in enthalpy is equal to the heat absorbed or released. At its core, the main function of an HVAC system is to transfer heat, which is a form of energy. The first law of thermodynamics, the Law of Conservation of Energy, tells us that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another. From that, we can infer that the only way to cool a space down is to remove the heat energy and transfer it somewhere else, typically outdoors. This is generally accomplished by absorbing heat from an airstream and then distributing this cool air to the area we wish to control; it helps to think of conditioned air like a sponge with the capacity to ‘soak up’ heat. The air, now laden with unwanted heat, is routed back via a Return Air pathway to start the process over again. The newly absorbed heat is ‘wrung out’ and expelled, and the cool air is distributed again in a constant cycle. This ‘wringing out’ process is mainly accomplished by mechanical cooling, such as a compressor, or free cooling provided by an air-side economizer.Continue reading Enthalpy as it relates to free cooling in HVAC
The world of HVAC changes every day. There are constantly new developments in equipment and how to reach pique efficiency when cooling and heating large-scale facilities. Check out the trade show and conference calendar below to find an upcoming event near you to stay up with the latest trends in 2019.
The Computrols Houston branch kicked off the project in October of 2017, integrating to the existing Johnson Controls system. In addition to interfacing with the existing JCI, DDC equipment, a core Computrols infrastructure is being installed. This infrastructure consists of a new headend computer, software, and lifetime-warranty controllers to replace the existing NAEs. These new DDC controllers communicate to the existing JCI equipment via N2 and BACnet protocols, enabling the building staff to monitor and control the existing JCI equipment. Computrols will also be providing additional lifetime-warranty controllers for future pneumatic to DDC floor conversions. Continue reading HVAC Controls Project: Lyric Centre – Houston, TX
Typically, VAVs are equipped with a means of reheating the supply air provided by the corresponding AHU. Continue reading AHU Supply Temp Sets the Stage
Energy and water conservation deliver a wide range of advantages, including cost-related benefits, ancillary savings, infrastructure improvements, reduced pollutant emissions, improved energy security, and, in some cases, increased productivity. Continue reading Energy Efficiency Measures for Winter