Archive for June, 2010
Gas metering is a big part of what we offer customers. One product that has proven to be very successful is the Honeywell Smart Multivariable (SMV) 
Transmitter. It is an industry leader – there are no others on the market that work as well. It measures the gas pressure & temperature and measures a differential pressure across a primary element. The primary element can be an orifice plate or a Preso Ellipse pitot tube. It creates a differential pressure that we measure and relate to flow (the square root of the pressure drop is proportional to the flow rate). The SMV calculates a corrected flow by accounting for the compressibility of the gas along with the pressure and temperature that exist in the pipe. It is quite an involved calculation that is pre-loaded into the transmitter and set up using a software wizard. Please keep it in mind for gas metering applications – it is an affordable alternative. For under $4000 you can measure big flows accurately with easy installation. Read More
Honeywell has introduced a new HVAC control valve technology that improves temperature control and lowers installation cost by eliminating manual balancing valves. The VRN and VRW series valves provide controlled flow, independent of pressure fluctuations in the system.
When conventional two-way valves in multi-zone systems open or close, the pressure-flow characteristic of the pumps causes an immediate head pressure change to all other valves in the system, resulting in overflow or underflow and the need for manual balancing. With Honeywell’s new VRN and VRW series, one valve integrates the balancing function and control valve function while providing a level of dynamic flow. The dynamic pressure regulator adapts to changing pressures and flows on the supply side of the system, and keeps the flow and energy delivery exactly where specified. In traditional systems, pressure fluctuations could affect the flow across the coils, impacting efficient energy transfer.
Dynamic pressure regulation maintains the required flow rate through the valve by regulating the pressure drop across the control valve seat. The actuator modulates the control valve portion of the valves to the required flow based on heating or cooling load requirements, independent of supply pressure. Flow won’t change until the control system needs to respond to an external change in thermal load or a change in set point. The result is consistent comfort, increased energy efficiency and increased actuator life.
Click here to learn more about the VRN and VRW valves.
Every two years Tridium, the pioneers of open systems, has a meeting that brings all the vendors of open products together to show all the incredible products that can now communicate via the Niagara software. Every summit I am amazed at how quickly controls and equipment are able to integrate and share information via the same web-based network.
Imagine a convenience store that integrates the HVAC controls, fuel tank monitoring, security, oven management, lighting control, freezer and cooler control and monitoring, and grease trap monitoring. It has been done! And you can monitor and control it all from the web.
The new products and applications blow me away — everything from the beautiful energy monitoring software, ProphetSuite, to the innovative new sedona framework wireless technology of Pervasive Devices, to the network devices of Contemporary Controls and Easy I/O, to energy meters from Onicon and E-Mon, to open controllers from Honeywell, Veris, and Viconics, to the lighting controls of WattStopper — all communicating on the Niagara open framework and all available through Stromquist & Company.
I hope to see you at the 2012 Summit !
The latest accurate information and demos on products
