A primary-secondary pumping system for HVAC systems wherein the common pipe is configured so that there is at least a 4 ft pressure drop across the length of the common pipe and that all thermal plants see the same temperature of water entering the thermal plants and that return water sees...
High Efficiency and Durability: This air filter boasts a primary efficiency of 95% and 90% secondary efficiency, ensuring effective air purification and a longer lifespan, making it a reliable choice for various industries. Versatile Application: Suitable for a wide range of industries, including ...
a secondary water supply pipe and a secondary water inlet pipe are mounted on the left side of the plate heat exchanger; a valve and a water circulating pump, which are communicated with the secondary water inlet pipe, are mounted on the base; a bypass pipe and a switch valve, which are...
2 Trane Centravac 145 Ton chillers in parallel each with a constant flow 290 gpm at 35 ft. head (5 hp) centrifugal chilled water primary pump. 2 variable speed (Danfoss VLT6000 Drives)secondary chilled water pumps (B&G 5x5x9.5 in-line centrigugal)in parallel (1 on standby)with a max....
wash fluid and a drain pump assembly for selectively draining that wash fluid in response to sump pressures measured by a water level detection system. Sp... AL Welch 被引量: 0发表: 2020年 WATER DRAIN ASSEMBLY, IN PARTICULAR FOR SIPHONIC ROOF DRAINAGE SYSTEMS A water drain assembly (1), ...
One embodiment of the present disclosure comprises a method of managing defrost operations in HVAC systems. In one embodiment a primary defrost operation comprises allowing a cooling cycle of the heat pump and a secondary defrost operation comprises allowing fans of the heat pump to operate at a ...
One embodiment of the present disclosure comprises a method of managing defrost operations in HVAC systems. In one embodiment a primary defrost operation comprises allowing a cooling cycle of the heat pump and a secondary defrost operation comprises allowing fans of the heat pump to operate at a ...
By monitoring the building HVAC operations, and optimizing the entering secondary loop water temperature, a 3% decrease in annual heat pump energy consumption is achieved.doi:10.1016/j.applthermaleng.2015.10.027Marmaras, JustinMechanical and Industrial Engineering, University of Massachusetts Amherst, ...
First, a thorough investigation of the variable primary flow chilled water system was conducted on the pump head and water loop differential pressure under differing load distributions. Characterization of the secondary system was conducted through theoretical modeling and simulation to reveal the key ...
The model integrates the primary chilled water pump head and water loop differential pressure under differing load distributions. Characterization of the secondary system was conducted through theoretical modeling and simulation to reveal the key control characteristics and the impacts of such characteristics...