Data Collection, Analysis & Web Display


CDH Energy has substantial expertise collecting performance data from field test sites. We process data from hundreds of sites each night, from a wide variety of data collection systems — including on-site systems installed by us as well as by other parties.

We are expert at distilling large data sets into useful information that can provide understanding of high level performance, drive decision making, and prove performance.

CDH also has significant expertise creating web sites to summarize measured CHP performance data as well as making detailed data available to others. We do this for our own field test sites as standard practice, but also collect and manage data collected by others. For example, CDH developed and operates the NYSERDA DG Integrated Data System website that presents hourly-performance data for more than 200 CHP, ADG, photovoltaic/solar and other renewable projects. We also run similar web sites for more than sixty CHP systems in Massachusetts for National Grid and Eversource (previously NStar), as well as a website for Doosan’s global fleet of over ninety 400 kW fuel cells. In addition, we are an approved third-party data collection contractor in California’s Self Generation Incentive Program (SGIP), a Qualified Reporting Entity (QRE) for the Western Renewable Energy Generation Information System (WREGIS), and a Qualified Independent Party (QIP) for the New York Generation Attribute Tracking System (NYGATS).

We are able to quickly implement custom web pages with project-specific tables and graphics that can include high level calculations that are germane to the project. We routinely develop and operate automatic, data-driven web sites that summarize equipment efficiencies, heat balance, and summarize economics or greenhouse gas savings.

For the last several years, we have operated an economic dispatch system that collects measured performance and load data from a facility control system and gathers hourly pricing data from the local utility in order to recommend the best operating strategy for multiple CHP units during the coming hour.

Example Projects

DG Integrated Data System – New York State

Since 2006, CDH has operated the NYSERDA Distributed Generation (DG) Integrated Data System website that presents hourly-performance data for more than 200 CHP, ADG, photovoltaic/solar and other renewable projects. We collect data from numerous sites each night and upload it to historic databases on the website. Data for some sites go back to 2004. This web site automatically collects and stores detailed data from NYSERDA’s portfolio of sites in an online system. The detailed dataset includes hourly performance data (power output, gas consumption, and heat recovered, etc) and well as facility characteristics data, emissions measurements, and operational and reliability data.

University CHP System – Middletown, CT

The CHP system installed at the university consists of a GauscorSFGLD 360 natural gas fired reciprocating engine generator rated for 676 kW. The system also includes a heat recovery steam generator (HRSG), high temperature hot water heat recovery loop, and low temperature hot water heat recovery loop. The HRSG uses engine exhaust to produce 55-psig steam. Engine jacket heat is recovered by the high temp water loop and is used for space heating and DHW heating. Aftercooler heat is recovered by the low temperature heat loop and is used for pool heating. The system includes two dump radiators. They are piped in parallel with the high temperature heat recovery loop and low temperature heat recovery loop respectively.

CDH installed an Obvius AcquiSuite EMB data acquisition system (DAS) in the Array System controls panel. The DAS collects data from the plant control system (PCS) via the Prosoft Modbus/TCP gateway installed. Data is collected at 5-minute intervals, and is uploaded to CDH servers once per day.

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Automated Web-Based Tracking of the NYISO Load

The ISO load for the New York Independent System Operator (NYISO) zones is tracked on an hourly basis (the database is updated every day). The data range can be customized and the plots show an hourly profile through the day, the peak load day (in MWh), the minimum load day (in MWh) and the peak demand (in MW).

Center of Excellence Meteorological Station – Syracuse, NY

The SyracuseCoE Headquarters site had a 50-ft meteorological tower that was in operation starting June 21st, 2006. Data was collected over fifteen minute interals and imported daily. Climatronics installed the Met Station which uses a Campbell Scientific CR1000 data logger and transmits via cell phone connection. CDH Energy then downloads the data and generates a web page. The 50-ft tower has since been disassembled and is no longer used as the source of data. Instead, Siemens had a meteorological tower installed on the roof of the building which is used for various BMS purposes, such as controlling the blinds. The Siemens system outputs this file to the CDH Energy server each night, where it is processed and used to generate the Center of Excellence Meteorological Station web page.