Category Archives: energy monitoring

Existing Building Energy Consumption: Current Situations, Trends, Legislature and Solutions (Series Post #3: Benchmarking)

In my last blog, I provided an overview of the energy audit process. I highlighted the importance of energy audits and want to further this discussion by exploring the topic of benchmarking. Due to rising energy cost and the negative impact of burning fossil fuels, legislators have been demanding, in addition to energy audits, benchmarking. The benchmarking process creates a baseline of comparison for buildings in order to accurately set energy performance/sustainability goals that are specific to your facility, such as reducing overall energy or water usage.

What is Benchmarking?
Benchmarking your building’s performance will show you how the energy performance of your building compares to other, similar buildings. This process involves tracking a building’s energy and water usage and applying a standard metric to compare the building’s performance against past performance and to buildings of similar stature. This information allows us to identify the energy intensive buildings, set energy and cost saving priorities and monitor progress.

Benchmarking in Legislation.
With cities growing at alarming rates, energy demands are skyrocketing. NYC has stepped up to the challenge and is a proven frontrunner for energy legislation, including benchmarking. New York City’s largest buildings, just 2% of roughly 1 million buildings, account for 45% of the energy expended. Building a better, greener, greater New York City starts with Local Law 84 (LL84); which was signed into action in 2009 by Mayor Bloomberg. This law mandates annual energy and water benchmark reports for privately owned buildings over 50,000 square feet. Since the enactment of LL84, California and Washington State have instituted statewide requirements for benchmarking in cities such as: Austin; Philadelphia; Washington, D.C.; Minneapolis and Boston. Cities across the United States are jumping on the benchmarking movement every day in a fight to reduce buildings’ energy consumption.

Problems with Benchmarking.
Building owners and operators often do not have access to basic information on how their building performs. If building owners and operators obtain this information, it can be difficult to interpret it accurately. Misinterpreting the numbers can be very misleading. Another difficulty is comparing your building to other “similar” buildings. Do you compare your building against one of similar size, but the building use is different? Factors such as facility size and occupancy information, vacancy data and number of computers used can all manipulate data. How can one make an accurate comparison?

The key to accurate benchmarking is the activities of the end users. Another key factor is communication. Facilities operators and owners must clearly articulate the goals of benchmarking their building, so that intentions are understood from the start. There are several motivations behind benchmarking, the main reasons given by facilities professionals for benchmarking according to the Lawrence Berkeley National Laboratory study in 2007 are as follows: a) to identify energy-efficiency opportunities, b) to prioritize investments, and c) to make comparisons to other facilities.

Data presentation should explain findings clearly; what you were investigating and what you found. Once you have your benchmarking data, it will help to identify why and where a building is losing energy and where and how you can save energy. A tool that can help includes the newly upgraded EPA Energy Star Portfolio Manager Benchmarking Tool. Read about it here.

What Type of Energy Audit Will Produce Accurate Benchmarking Data?
In my next blog post, I will discuss the building technology society founded in 1894 known as the American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE). This professional association focuses on building systems, energy efficiency, indoor air quality, refrigeration and sustainability within the industry. I will explore what ASHRAE’s standards and guidelines are for energy auditing in my next post.

Do you have any questions regarding benchmarking? Leave me a comment and I’ll be sure to address them.


Filed under Building efficiency, Energy, energy audit, energy consumption, energy efficiency, energy monitoring, energy usage, EPA

Renewable Energy: Sunny Skies or Gridlocked?

It’s nice to see that the energy industry is starting to address some of the glaring problems that are out there such as energy shortage, depletion of domestic oil and gas reserves, and lack of incentives to invest in domestic energy facilities to name a few.  Renewable energy is moving front and center to become THE next energy resource. However, the solutions are not without their challenges. Energy generation and delivery still needs a good solid look as the cost to save one kW of energy using a renewable energy resource is approximately $0.11/kW, while saving that same kW through energy efficiency in existing building and homes is only at $0.03/kW.

The challenge with renewable energy is integrating it into the power grid. With the emergence of smart meters, we can see where the power is going at any given place and time. This will help to put a focus on generating plant production at the right place and at the right time. With that said, renewable energy does not have the luxury of turning itself on or off (reducing the demand that could be placed on the electrical grid). In addition, the business model for renewable energy is most effective when it is operating for the longest time possible.

Renewable energy should be baseloaded with the power generation plants to pick up on any energy swings. Smart meters would be able to anticipate when those swings will happen. The dilemma occurs when the renewable energy source does not produce enough to reach the level they were intended to produce. This can happen when units go down for maintenance, break down or don’t produce enough megawatts because the wind is not blowing or the sun is not out.

Programs like demand response can help lessen the high demand on the power grid. Having a program to reduce the peak load on the grid through end-user participation is helpful. However, when the response event comes at an inopportune time or cannot be incorporated due to other circumstances, this puts additional variables into the equation that makes renewable energy less desirable or predictable.

Energy monitoring is a great way to promote energy consumption awareness to determine the Where, Why and at What point a facility is using energy. This will allow for energy efficiency awareness and enable facility operators to be proactive. But once again, the end-user must know what to do with all the data that they are receiving. Knowing where your energy consumption stands is great, but knowing what to do with all the data once you have it is the key to energy reduction. Finding a solution to analyze the data will really help a facility to control its energy consumption. The amount of data produced is astronomical and unless the data is analyzed and trended on a regular basis, it will be of little to no value. A process needs to be developed that addresses how to use analyze and interpret the data.

All of these items and their challenges are important as we move forward to solve this country’s energy needs. These challenges can not be avoided and they need to be navigated with viable solutions. Coordinating all of the solutions together will put us in a better position for our electric infrastructure. Always have a contingency plan so that you don’t fail to plan; and be prepared so that you don’t plan to fail.

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Filed under Energy, energy consumption, energy monitoring, energy usage, renewable energy, smart grid, smart meters