Concrete Products

AUG 2018

Concrete Products covers the issues that attract producers of ready mixed and manufactured concrete focusing on equipment and material technology, market development and management topics.

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Page 49 of 71

48 • August 2018 FEATURE CNG MIXER FLEET Along with site preparation for natural gas supply, compressors, fueling equipment and lines, Catalina Pacific ® upgraded the Normandie Ave. ready mixed plant in Torrance, Calif., with the installation of a KVA 750 transformer and power distribution switchboard (below right). With 1,600-amp capacity—double the prior service—the new equipment is equal to existing loads and any peaks encountered in the event the CNG fueling infrastructure must run at full duty (2.2 gallons/minute per compressor). The principal power draws in the natural gas delivery to the mixer truck tanks are the twin compressors' 125-hp motors (opposite page), operated on alternate days. Management sweats energy consumption details at Catalina Pacific and sister operations across CalPortland ® Co., which in 2017 marked a 14 th consecutive year for U.S. Environmental Protection Agency Energy Star Partner of the Year designation. Energy Star Partners excel at driving power consumption down, year in and year out, and promoting best practices internally and to sector peers. The CalPortland Energy Management Services Program monitors and continuously improves the functionality of energy use across 65 ready mixed concrete and 25 aggregates operations, plus 16 cement plants/ter- minals. Power consumption metrics include kilowatts per yard of concrete or ton of raw material. The Catalina Pacific Normandie and Alameda plant natural gas fueling infrastructure invite another Energy Management Services benchmark: kilowatts per CNG gallon, most often gauged as diesel gallon equivalent and measured by compressed-gas tank psi level. Stepped up Normandie power requirements from the CNG infrastruc- ture are monitored with batch plant and other existing source draws through ezeio, shown below at the lower right of the small NEMA cabinet. Folsom, Calif.-based eze System Inc. describes its signature device as 1) "a complete solution for monitoring, alarming, control and automa- tion of commercial and industrial equipment"; 2) "designed for easy deployment in geographically spread out, multi-dicipline applications where traditionally several single-purpose systems were needed"; and, 3) serving as "the missing link between your browser and the real world." The ezeio hardware connects to sensors, meters, thermostats, vari- able frequency drives and other control devices locally through industry standard interfaces. It links securely via the Internet (ethernet or cellular) to a cloud-hosted application at, from which users can access power consumption data in real time and check against historical electricity usage figures. Common applications include monitoring energy through electrical, gas and water meters, plus pow- er-saving device performance measurement. The ezeio controller has four analog inputs, two relay outputs, Modbus, Microlan and optional wireless connectivity, and is compatible with a wide range of standard sensors. Each controller can be expanded to monitor up to 40 different inputs. Each value can be recorded and have multiple alarming thresholds. — ENERGY MONITORING WITH EZE

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