Industrial Utility Efficiency

# System Assessments

An envelope manufacturer is upgrading their vacuum system to include a new VSD controlled pump. As part of the preparation for the installation, an energy baseline was developed, and leakage survey conducted. The auditor used a newly developed acoustic imaging camera as well as a basic ultrasonic leak detector gun. This article describes what was found and some of the challenges faced in detecting leaks in a busy plant.

## Paper Machine Vacuum Systems: Liquid Rings vs. Blowers

A paper machine carefully removes water from the paper sheet. Some of this water removal is done by passing air through the sheet, thus moving the water from the sheet to the wire. Air is moved by creating a pressure differential across the sheet. This is normally done by putting the sheet on a wire and then putting a box under the wire and then evacuating the air from the box. The resistance of the air movement through the sheet and wire causes the pressure drop from the machine room to the box.

## Considerations for Sizing Vacuum Pumps in High Humidity Applications

Many of us are familiar with sizing vacuum pumps based on throughput, process pressure requirements, chamber size, pump down times, conductance and leakage. In a lot of cases, humidity becomes an afterthought and unexpected things happen. Some of these unexpected things we learn to live with, like emulsified oil. In other cases, the unexpected things prevent the pump from performing the job it was intended for.

## Measuring Blower Airflow in the Field

Most electric utilities offer customer incentives for implementing energy conservation measures (ECMs) Incentive programs pay customers to use less energy. In some cases they are mandated by legislation and in others the incentives are driven by the utility’s desire to avoid building new generating capacity. Some incentives are based on reduced energy use (kWh) and some are based on lower peak demand (kW).

## Rethinking Aerobic Digestion Resolves Frustrations, Improves Performance, and Saves Money

Aerobic digestion is a common treatment technology used at small-to medium-sized wastewater treatment plants for the treatment of waste activated sludge (WAS). The objective of aerobic digestion is to treat the sludge for disposal, and for those trying to meet Class B biosolids, further reduce volatile solids (VS) and pathogens to ensure the sludge is suitable for land application.

## Blow-off Air

A metal producer, in the Midwest, spends an estimated \$2.4 million annually on electricity to

## Blower Controls

The capacity and pressure requirements of blowers in a Water Resource Recovery Facility (WRRF) are

## Conveying

In open end pipe line suspension flow, or dilute phase pneumatic conveying, proper particle

## Pressure/Vacuum

Machine builders aiming to improve the energy efficiency of their machines tend to focus on using

## Vacuum Controls

In the world of semiconductor manufacturing, it’s an understatement to say peak productivity and

## Vacuum Generation

Air-driven Venturi vacuum generators have long been a viable option for fast-response, localized,