Posts Tagged ‘demand control’



Demand Control for Industrial Energy Savings

febrero 6th, 2012 by pherniak

Industrial energy management is a task required for efficient industrial engineering and facilities management across many fields. A significant portion of this job is that of demand control. Depending on the maximum power demand placed by a facility on their utility provider, there is an associated fee. This demand is measured as the maximum power consumed within a 15 minute period for the regular billing term. As such, improper load scheduling could result in demand charges exceeding 50% of the total electrical bill.


With a suitable demand controller, such as the DemandMiser Maximum Demand Controller from EG Energy Controls, this fee can easily be reduced. As well, by reducing demand, total energy consumption can be dropped by up to 20%, depending on the situation. The DemandMiser is applied to an industrial electrical framework by controlling loads such as compressors, fan motors (through a variable speed drive), heaters, air conditioners, lighting or other non-essential loads. The DemandMiser senses through its data collection and interpretation system when a demand peak is occurring; it will then start shutting off various loads so that the energy demand is reduced. This simple safeguard can save money across any industry.


The system offers great communication and reporting features. Reports can be compared across facilities, filtered by size and energy, or any combination required. This information can be used for accurate incentive programs for a chain, the head office would be able to reward a specific branch for their energy conservation efforts. In addition, the system can be programmed to send alerts to designated personnel, informing them of the specific loads shed and demand characteristics. The installation is full of options, the system can be integrated with digital meters and its load shedding outputs can be connected to existing building management systems with dry contacts or relays.


The DemandMiser is appropriate for energy savings in any facility that is charged for peak demand usage. Whether a commercial application or industrial facility, demand control has a significant influence on profitability and efficiency. Accountants for these facilities can easily see the benefits when the reports come in from the DemandMiser and the energy bills arrive each month cheaper.


The benefits extend beyond the facility where the DemandMiser is installed. The utilities providing the power for this facility are under less strain, and can thus supply for the demand across their whole jurisdiction without risk of brownouts, or having to turn on expensive secondary power plants. By smoothing demand, power is spread more evenly and as much as is necessary at a given time. Keeping the industry running smoothly, safely and efficient, that is the way of the DemandMiser.


Carbon Tax in Australia and Energy Efficiency

enero 16th, 2012 by pherniak

Carbon Tax in Australia and Energy Efficiency

In Australia, a carbon tax has been implemented across the society as of October 2011. This emissions trading scheme is meant to reduce global warming. Australia’s carbon production, in the amount of 500 000 000 tonnes of pollution a year has led the government to implement measures to stifle these smokestacks. Since there are many negative externalities associated with pollution, a cost will be applied to those who produce this form of pollution. This must be included in budgets for Australian industries and businesses. The carbon tax in Australia will change how business is done, since the initial price of pollution under the tax scheme is $23 per tonne of pollution, people must act.

To counter this rising cost of doing business, industries must dramatically reduce the energy they consume. There are many measures of energy efficiency and ways to implement them. Broadly, some of these include light dimming, energy management and load shedding.

Light dimming can be an easy way to reduce energy consumption. For HID bulbs, such as metal halide, high and low pressure sodium and pulse start lamps, a regulating system can be applied to the voltage. By lessening the voltage, there are correspondings reductions in power consumption. The VoltMiser HID light dimming system from EG Energy Controls. This system is the only light dimming system that is approved to operate within required limits for warranties on ballasts and bulbs. As well, voltage can be reduced further, causing increasing savings. Supermarkets, warehouses, automobile dealerships and sports arenas can all benefit from this technology.

Light dimming can also be combined as part of an effective load shedding schedule to counteract the carbon tax in Australia. Load shedding, as demonstrated by the DemandMiser system from EG Energy Controls. A large portion of industrial energy costs comes from peak energy usage, defined as the largest amount of energy used across a 15 minute period. The DemandMiser works on customized algorithms to shed loads that are not required for facility operation. This can include dimming lights across the facility, air conditioning in certain wings of the building or whatever the operator specifies.

An effective energy management system is key in successful navigation of the Australian carbon tax’s cost structure. A comprehensive energy management setup such as the Energy Surveillance System from EG Energy Controls allows for managers to finally be able to quantify and manage energy and other resources. This system operates by monitoring sub-loads through its monitoring modules. Sub-loads include electricity consumption for a given device, or set of devices, gas and oil consumption, as well as water consumption. Wasteful and expensive elements of the facility can be quickly identified and eliminated. Having this sort of knowledge into the energy and resource use will allow for immediately tailoring and streamlining without affecting facility operation.

The carbon tax in Australia was designed for businesses and industries to focus their attentions on cost-reduction strategies such as the ones outlined above. By putting a monetary price on pollution, rather than the negative externalities that are burdened by all, businesses must budget for the energy consumption in new ways, approaching it with more knowledge and control. EG Energy systems can help with these tasks.





Demand Control and Industry

diciembre 2nd, 2011 by pherniak

Industrial facilities are large scale consumers of electricity. As such, they frequently are charged large amounts on their electricity bill for demand usage. Demand usage is the maximum power required by the facility on a certain interval (determined by the electricity provider). For industrial facilities, this charge can represent upwards of 50% of the total bill. This is a significant portion of operational costs.

To reduce costs and overhead, one must look to where costs can be cut most effectively. Demand charges are definitely an example of this. Expenses can be cut without any major sacrifices in operations. It is simply a matter of predicting when the times of large power consumption will occur, and adjust correspondingly. This can be achieved by cycling operations slightly differently or shedding non-essential loads in times of high energy usage. Non-essential loads can be things like pumps, furnaces, machinery, compressors and lights. What is essential and what is not depends entirely on the application, this is the essence of demand control.

Adjusting these loads is not something to be done manually; that would be very difficult and not produce effective results. Instead an automated system must be put in place for demand control. One such system capable of handling industrial loads for demand control is the DemandMiser from EG Energy Controls . The system is made with industrial grade components and can communicate via multiple protocols for tracking of the system. It can then provide information to authorized personnel through the web interface.

The system requires the customer to choose the priorities of their loads; certain will be the first to go, certain ones will never be shed. This is entirely customizable. With a proper load shedding priority, an industrial facility can reduce energy by 25% without significantly changing operations. In any industry, this is quite significant. The DemandMiser can be used to increase overhead, extend equipment life and lessen strain on the power utilities.



The Energy Conservation Suite

octubre 23rd, 2011 by pherniak


Energy conservation is a multi-faceted endeavour. Depending on the facility in question, there are many opportunities to save energy. In every stage of power consumption, systems can be optimized to use the minimum amount of energy for a certain purpose, or can have their times of consumption set exactly to coincide with periods of lower energy cost. Energy conservation in this manner will lead to greater environmental stewardship, reduced energy costs, longer lasting machinery and an all around cleaner situation.


EG Energy Controls offers a variety of products designed to conserve energy in a multitude of ways. Each system on its own offers great potential for energy conservation, but when used as a suite, an entire facility can have every energy load and sub-load optimized for efficiency. For this article, we will consider the first step to be with lighting. To produce enough light in a facility for workers or inhabitants to function properly requires a large amount of power. HID light bulbs, such as high pressure sodium or metal halide bulbs require upwards of a thousand watts per bulb. Light produced is generally proportional to power consumed, however there are certain ways to reduce power while still producing copious amounts of light. The VoltMiser HID Controller takes advantage of this technique; it reduces voltage to a lamp by a pre-determined amount (up to 25%) and can reduce energy usage by up to 25%. Facilities such as factories, supermarkets, outdoor sports fields, car dealerships and parking lots can all benefit from reduced the energy bills and longer lamp life provided by the VoltMiser System.


Another area that EG Energy provides an energy conservation solution is in motor control. A variable speed drive (VSD) can control motors (for fans or pumps) precisely, adjusting rotational speed for the time of day, or load profile. In fact, approximately 65% of industrial electricity is used to power rotational motors, such as HVAC systems or liquid pumps. Instead of providing a pulsed current to the motor, which can damage machinery through mechanical and thermal stress, as well as complicate handling procedures, the VSD puts forth a constant speed and smooth operation. Depending on the pump and speed reduction, power can be reduce by up to 55%, leading to efficient energy conservation.


Power companies charge consumers based on the maximum power they require at a certain time. A certain peak power demanded from the grid will come with a cost. By reducing this level of demand, the energy bill can thus be slashed and energy conservation can be achieved. The DemandMiser from EG Energy Controls senses times when power will be consumed at a maximum and sheds non-essential loads to reduce this power consumption. As such, a large portion of the power bill can be erased, without changing how much power is consumed, but rather the time-frames it is consumed. The DemandMiser integrates very easily the the Energy Surveillance System, which provides a detailed outlook at power and resource consumption, customized for the precise types of sub-loads, such as electricity, gas and water. These results can then be automatically graphed and e-mailed to specified addresses. Data can also be automatically exported to accounting software, automating a large portion of energy conservation and providing exact data. It is difficult to manage something you cannot quantity, and the ESS provides this. This energy conservation suite, a combination of all the systems previously mentioned, works together very effectively. Energy saved is an environment saved.


Energy Conservation for Breweries

octubre 16th, 2011 by pherniak

In industry and business, it is difficult to manage something you cannot quantify precisely. One cost that fits within this criterion is that of Energy and Power. Energy gets consumed, and the bill comes, but exactly where it has been used is sometimes an elusive side-note. Optimizing this expense in energy is nigh impossible without a proper energy surveillance system. One sector that can benefit very much from the process known as energy conservation is the brewing and beverage production.

Brewing is a very old profession, though its industrialization has only occurred in the later portions of its lifespan.  The process requires large amounts of energy and is typically divided into 9 portions. Malting, milling, mashing, lauting, boiling, fermenting, conditioning, filtering and filling. The first three in the process provide the brewmaster with a sterile mixture for fermenting, the transfomation of sugars into alcohol. By this point, there have been heaters, mixing tanks and mechanical separators running. This represents a significant amount of energy, one that if surveyed can give brewmasters great insight into the procedure. Other steps in this procedure require more filtration, washing and energy spent bottling. This task requires quite an infrastructure to accomplish, and there are lots of places where energy is used. There are many machines, heaters, lights and other equipment in the area.

The Energy Surveillance System from EG Energy Controls easily provides such an infrastructure for energy conservation. The system operates with a server and remote monitoring apparatuses to nearly any energy load possible. There is potential to monitor water, heat, gas, electricity, HVAC systems, motors and even lighting. The server can efficiently provide reports and graphs, customized to your preference. They can be e-mailed automatically to the parties responsible for energy conservation and monitoring within the brewery. Information is collated and can be provided to accounting or management software, thus automating analysis of energy use and the benefits of energy conservation.

This infrastructure can then be used for demand control. At different points in the day, utility companies charge based on demand; if enough people are consuming power, then their plants must run at peak capacity or they must activate secondary, demand, power plants. Being able to coordinate the brewing process at points when energy is the cheapest can widen margins for companies. The money saved is but one benefit of the system. Consider the efficient use of your equipment, ensuring it is not overworked, but rather operating within correct parameters. This also corresponds to greater environmental stewardship and a dedication to clean technology. Energy conservation thus has great potential.

Breweries seeking energy efficiency and energy monitoring solutions should look further at the possibilities the Energy Surveillance System offers. Setups both large and small can benefit from the knowledge and insight obtained with an effective energy monitoring solution. Each stage has its own idiosyncracies and equipment, but the system can be customized for nearly anything, down to the lighting on the floor. This system is very appropriate for breweries and associated industries, being able to quantify and analyze energy consumption for a facility can give great insight.




Energy conservation provides many benefits. There is the initial benefit of reduced energy costs, but with this comes longer lifespans for equipment and a cleaner environment. This in turn creates economic and personal security for whatever institution or individual committed to energy conservation. Stretching one’s energy budget is an admirable goal with many quantifiable benefits. Two possible areas for energy conservation are with lighting controllers and demand control. Both of these elements work together for efficient load shedding.


Every facility requires light in some manner, and although the most efficient option is natural daylighting; this is not always available or effective. The architecture and layout of a building may mean that only certain areas at certain times can benefit from the sunlight. Instead, electric lighting is used. The most popular styles of lighting are High Intensity Discharge, Metal Halide and High Pressure Sodium. All of these styles consume large amounts of power however. An HID lighting controller can be used to reduce energy consumption. The VoltMiser system from EG Energy controls is an HID lighting controller capable of reducing power consumption to all the lighting styles mentioned above. This lighting controller operates by reducing voltage within levels specified by manufacturer warranties (though larger reductions are possible), and reducing power consumption up to 25%. This is a large portion of an energy bill and it is achieved with minimal lumen loss. One must take care not to over-illuminate workspaces; this has been known to cause headaches, worker fatigue and worker error. A lighting controller, like its name says, will grant precise control over illumination and adds to load shedding goals.


Utility companies charge extra at certain times of the day, these correspond to the highest demand. Power consumers can use load shedding to reduce their consumption at these times. This is the process of turning off non-essential loads, thus allowing for demand control. Both the consumer and utility company benefit from this; the consumer has reduced expenditures and the utility company has less strain on its infrastructure. To do this manually would be quite the chore. Instead, automated systems exist to enable load shedding of specified loads at specified times or power consumption levels. The DemandMiser from EG Energy controls is one such example. The system is completely programmable and adaptable; it can handle any load, from compressors and electric heaters to pumps and motors. The DemandMiser demand control system can also quantify its demand control through graphing and notification capabilities.


Energy Meter

Use demand control and lighting control to reduce power consumption

These options combined cause drastic energy savings for large facilities. They autonomously allow buildings to take only what power is needed. Demand control minimizes energy use when prices are highest and enables load shedding. A well thought energy conservation plan can do wonders for operating costs of a business, help with environmental responsibility and maintain resources.



Variable Speed Drives and Energy Savings

septiembre 9th, 2011 by pherniak

Industrial facilities consume large amounts of power throughout their operation. A major draw on this power is the HVAC system, compressors, and liquid pump systems. Approximately 65% of energy consumed in industrial situations is from motors. Reducing this overhead expenditure can ensure profit margins and energy efficiency. There is a great opportunity for savings here.


EG Energy Controls produce a system designed precisely for this purpose; the PowerMiser VSD. It controls variable speed drives for maximal energy savings. The turn-key system can be easily retrofitted to existing systems or incorporated into new industrial designs. In most cases, fan speed can be reduced by 25% for central HVAC systems without compromising air quality. The PowerMiser VSD uses a pulsed square wave signal to modulate the operation of motors. Pulse width depends on load size and desired power reduction; the system is designed specifically to not to stress motor windings (either thermal or electromagnetic stress). Additional benefits include more precise process control and soft starting. As well there is no need for energy wasting throttling systems; these inefficient systems include outlet dampers and control valves. There is also a voltage change filter (DV/DT) to prevent voltage spikes to motors not inverter rated. The system thus ensures maximum lifespan for all motors controlled by the system.


With control over rotational speed, comes control over torque. This means that a variable speed controlled AC motor can be comparable to a DC drive in terms of speed accuracy and quick torque response. The PowerMiser VSD offers dynamic torque control, with the ability to choose the torque level or keep it at constant levels. Processes involving rotating machines can be fine-tuned for energy savings and precision. The system can also be used to reduce demand during peak hours, saving more capital.  Industrial engineers and process control officers should take note of the system for its benefits and potential savings.


For more details: visit



Load shedding is a means of reducing demand usage in a facility and will reducing energy usage by up to 20%. Many times demand charges exceed 50% of the total electric power bill. This makes demand control a very attractive option to reduce operating costs.

What is Demand Usage?

Demand usage is the total amount of electricity being used by a consumer during a defined time period. By performing demand control, huge savings can be achieved.

Demand varies from hour to hour, day to day and season to season. This usage that is expressed in kilowatts (not kilowatt-hours) and is called the demand peak on the system.

The utility records demand over a 15-minute time period. The company is charged for the highest 15-minute usage recorded on the demand meter. After the utility reads the meter each month, demand is reset to zero and the meter starts over, recording the highest 15-minute usage for the next billing period. You will see this charge on your power bill.

kva charge

kWh charge (not kW)

demand charge

demand usage

The demand charges many times exceed 50% of their total electric bill. This makes “Load Shedding” very attractive to reduce companies operating costs.


How Does Load Shedding Work?

In order to reduce demand peaks in a facility, the Maximum Demand Controller monitors the main utility meter in the facility and by measuring every 5 minutes the demand usage, the DemandMiser will perform automatic load shedding when it notices a demand peak is coming. Shown below are example loads that would be connected for demand control:


Fan Motors (with variable speed systems)

Electric Heaters


Air Conditioners & Others

Demand Usage Reporting


Advanced reports show the demand usage and loads being shed for each location. If you would like to reduce load shedding, you can automatically adjust the threshold until you are comfortable with the values.

Graphing capabilities provide information such as daily, monthly, yearly demand usage and can be easy glanced over using various line chart, bar, or pie.

The DemandMiser provides a graph that compares demand usage by location, size,operation, hours etc. A demand usage profile of one facility can be compared with another. This data can be used to negotiate contracts for energy usage and to reward facilities that have reduced their overall energy usage.

Notification & Alerts!

Alerts and notifications can be configured to notify what loads were shed and period of time and current peak demand that can be easily compared to previous demand peaks.

Automatic Load Adjustment

The web interface is easy to use for setup and load shedding configuration.

Custom load limits can be set for each month providing more control. The demand controller has an algorithm that automatically increases the load limit if more energy is needed for the building eliminating excessive demand shedding.


Access Multiple Locations

The DemandMiser Maximum Demand Controller is the only system on the market that can remotely connect to other locations that have Demand Controllers installed.

For companies that have multiple locations, energy managers can easily view data and configure systems from a single location via the web interface.

PG&E’s demand response programs offer incentives for business owners who curtail their facility’s energy use during times of peak demand. Find out how your business can benefit and help make a difference in the state’s energy well being



EG Energy Controls can assist companies by offering sophisticated demand controllers that can be used in Peak Day Pricing initiatives.


What is PDP?

Peak Day Pricing is a Time Varying Pricing Plan. Learn more about Time Varying Pricing here.

Peak Day Pricing (PDP) is a pricing plan that encourages customers to conserve energy when temperatures, market prices, capacity or grid reliability conditions exist, typically on hot summer afternoons. On this plan, participants will see additional charges during peak hours (weekdays from 2 – 6 p.m.) on a limited number of “Event Days” throughout the year. In exchange, they will receive credits (varies by tariff) for usage throughout the summer. Customers who can reduce their load during these high cost periods, or shift load from higher cost to lower cost periods, may benefit on this plan. Tariffs differ and not all customers receive credit for all usage.

To learn more about how PDP may impact your account, please roll over and click the icon, above, that represents your business type.

Why does PG&E offer Peak Day Pricing?

This pricing plan is part of a statewide initiative led by the California Public Utilities Commission (CPUC) to reduce peak energy demand, which:

Helps to stabilize the energy grid, thus avoiding power interruptions

Reduces power plant load capacity

Reduces greenhouse gases as a result of energy use

By making this plan available to our customers, we aim to encourage and help customers to reduce their energy consumption during peak periods, and help them save on electricity costs.

Transitioning to Peak Day Pricing

For eligible accounts, PG&E will transition customers from their current pricing plan to PDP. Affected customers will be provided multiple notices in advance of their transition date, and all customers will be able to opt-out of PDP to another time-varying pricing plan or alternative demand response program.

Customers will automatically transition to PDP depending on business type and certain eligibility criteria. Roll over the icons in the header above to see when businesses like yours are scheduled to begin transitioning to PDP. For your specific account to be eligible for transition, you must have 12 months with an interval meter (e.g. a SmartMeter™ device). Customers who participate in Direct Access or other Demand Response programs will not automatically transition to PDP. Net metered customers are not eligible for PDP. Additional exceptions apply.

Transition Schedule

High Demand customers

Monthly Demand ≥200kW
Transition to PDP starts May 2010
E-19, E-20, A-10, E-37 rate schedules

Large Agricultural customers

Monthly Demand ≥200kW
Transition to PDP starts February 2011

Small/Medium Agricultural customers

Monthly Demand up to 200kW
Transition to TOU starts March 2013


Small/Medium Business customers

Monthly Demand up to 200kW
Transition to PDP starts November 2012


EG Energy Controls is the manufacturer of a patented HID lighting controller called the VoltMiser Lighting Controller.
These systems have been installed in over 300 locations. They are manufactured within North America and use industrial grade electronics.
How Does HID Lighting Controller Work?
The concept of HID lamp dimming is very simple but effective. Using an autotransformer the patented VoltMiser Lighting Controller can select up to 4 power levels to achieve the reduced power level.
By having multiple power levels, the system can work in conjunction with the existing building automation system schedule or photo sensor to optimize savings during light harvesting or meet a specific lumen light level for the facility.
The autotransformer is custom designed to provide a perfect sine wave to the ballast and lamp ensuring the max life of the lamp. In addition, the use of the autotransformer does not add any harmonics to the electrical system.
What is HID Light Dimming?
HID Light dimming for HID and HPS lights is the reduction of power to the lamp ballast by means of a multi-tap auto transformer that is connected to a dedicated lighting panel. The VoltMiser HID Lighting Controller uses patented technology to automatically select the mult-tap power reductions on the auto transformer and reduce the voltage to the lighting panel by 13%, 18% and 25%.
This reduction in voltage means the lights are using less energy and the ballasts are running cooler since they perform better on reduced voltage. Lumen reduction is not noticeable when proper power reduction is performed

Last DSIRE Review: 01/25/2011
Program Overview:
State: Connecticut
Incentive Type: Utility Rebate Program
Eligible Efficiency Technologies: Lighting, Lighting Controls/Sensors, Chillers , Heat pumps, Central Air conditioners, Motors, Motor VFDs, Processing and Manufacturing Equipment, Comprehensive Measures/Whole Building, Custom/Others pending approval, Commercial Refrigeration Equipment, Food Service Equipment
Eligible Renewable/Other Technologies: Geothermal Heat Pumps
Applicable Sectors: Commercial, Industrial, Local Government, State Government, Fed. Government, Institutional
Amount: Custom: 95% of incremental cost
Lighting: $0.15-$0.50/sq. ft. + $5/super T8 fixture
Lighting Occupancy Sensor: $30/controlled fixture
Day Lighting and Dimming: 75% of incremental equipment cost
Motors: $45-$700
HVAC and Ground Source Heat Pumps: $50-$150/ton
Fan VFDs: $920-$1310
Pump VFDs: $1710-$4580
Maximum Incentive: $750,000 per Customer’s Federal Tax ID in all programs
$300,000 per metered site or account for all programs
Custom Retrofit: 75% of utility measure cap
Custom New Equipment: 60% of utility measure cap or 40% installed cost
Lighting: $50/fixture
Day Lighting and Dimming: 40% of total installed cost
Rebates will cover up to 100% of the incremental cost of upgrades
Installation Requirements: Lighting: 80% of connected project lighting must be of eligible efficiency.
Project must have been signed after 1/1/2009
Funding Source: Energy Efficiency Fund
Start Date: 1/20/2011
Web Site:
All Connecticut Utilities implement electric and gas efficiency rebate programs funded by Connecticut’s public benefits charge through the Energy Efficiency Fund are eligible for Energy Conscious Blueprint Incentives. The Connecticut Light and Power Company, The United Illuminating Company, Connecticut Natural Gas, Southern Connecticut Gas, and Yankeegas commercial customers can access the Energy Conscious Blueprint Program for new construction and major retrofits.
Custom and prescriptive rebates are available to increase the energy efficiency of non-residential new construction and major renovation projects. The rebates will vary by square footage, capacity and incremental cost. Customer must apply for this program before any construction starts. In addition to these rebates, the Energy Conscious Blueprint Program has a grant component that covers larger capital projects. Utility company energy experts will work with design teams, architects, engineers and contractors to identify energy-saving equipment and tactics for your consideration. Participating organizations maintain complete control over the project. For qualifying projects, these financial incentives can cover up to 100 percent of the incremental cost.


Connecticut Light & Power
Customer Service
P.O. Box 270
Hartford, CT 06141
Phone: (877) 947-3873 begin_of_the_skype_highlighting              (877) 947-3873      end_of_the_skype_highlighting
Phone 2: (800) 286-2000 begin_of_the_skype_highlighting              (800) 286-2000      end_of_the_skype_highlighting
Web Site:
Roy Haller
The United Illuminating Company
157 Church Street, MS1-68
New Haven, CT 06510
Phone: (203) 499-2025 begin_of_the_skype_highlighting              (203) 499-2025      end_of_the_skype_highlighting
Phone 2: (800) 722-5584 begin_of_the_skype_highlighting              (800) 722-5584      end_of_the_skype_highlighting
Fax: (203) 499-5973
Web Site: