Description Look at both burner motor cycling and stack temperature to obtain a deeper understanding of the heating plant’s efficiency. The burner motor(s)’ on/off status is logged to determine boiler staging performance. It is also used to determine whether short cycling is occurring, when used in combination with stack temperature. Short cycling not only indicates… Continue reading How is the boiler cycling, and what is the stack temperature?
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Is a hot water reset used to control the hot water supply temperature?
Description Determine whether a hot water temperature reset schedule based on outdoor air temperature is in use and operating properly. This requires monitoring the hot water supply temperature and the outside air temperature. It may be the case that a hot water reset is being used; however, this measure will help to verify its performance.… Continue reading Is a hot water reset used to control the hot water supply temperature?
Boiler Measurement Guide
This guide describes the measurement approach for quantifying avoided energy use associated with retrofitting existing boiler systems with more efficient boilers.
Heating Season Tips
Building Envelope Cold Spots & Equipment Overheating To find building envelope cold spots including: insulation, air leaks and internal air leaks, perform a visual inspection with a thermal image camera. Use a thermal image camera and identify areas in your building were insulation could be missing. Check for air leaks around outlets, doors, windows &… Continue reading Heating Season Tips
Motor Vibration
Types of problems related to rotating equipment A wide variety of problems in rotating equipment can be causes of motor vibration which can lead to issues like: Unbalance (When there is a voltage difference between the phases of a three-phase system). Misalignment (When there is a angular misalignment where the motor shaft is under an… Continue reading Motor Vibration
Overheated Electrical Components
Types of problems related to overheated components A wide variety of problems in electrical equipment can be causes of overheating. Overheated components can cause issues such as: Loose Connection (When there is a look and hearing for flickering, buzzing or dimming of lights). Overloads (When there is a overuse of extension cords and multiple plugs… Continue reading Overheated Electrical Components
Maintenance Tips
Maintenance frequency An equipment specific checklist and maintenance log is key to having a consistent maintenance program. Sings of poor maintenance Low equipment utilization due to unscheduled stoppages. High wait or idle time for machine operators during outages. Higher than normal repair costs due to lack of lubrication, and inspections. Requirements needed for improvements Organization… Continue reading Maintenance Tips
Case Study: Air Handling Unit in a Public School
Custodial Engineer Ciaran Lee borrowed 4-channel loggers, temperature sensors, and CO2 loggers to measure and analyze the operational effectiveness of an analogue air handling unit in the basement of PS 153.
Purpose of Guides
This guide is one of a series developed with the goal of implementing consistent, simple, purpose-driven measurement processes to help quantify the impact of projects designed to further New York City’s greenhouse gas (GHG) reduction goals. These guides are designed for use by internal and external stakeholders to facilitate comprehensive characterizations of building energy consumption… Continue reading Purpose of Guides
Why Take Measurements?
Documenting consistent measurement techniques and reporting standards for DEM-funded energy efficiency projects is a vital step in facilitating judicious project selection and efficient program management. In agency applications for DEM project funding, the use of measurements (as opposed to general assumptions) yields more accurate estimates for baseline consumption and expected avoided energy use. Measurements promote… Continue reading Why Take Measurements?