School district here in Little Rock is getting killed by Entergy Arkansas Schedule LGS demand charges on their HVAC systems. District has 18 schools, each with 4-8 rooftop units that all start when classes begin at 7:30am. Demand spikes from 50kW overnight to 300-400kW within 30 minutes across the district. Summer demand charges are running $85,000+ monthly. Superintendent is considering cutting programs to pay electric bills. This is a crisis situation that needs immediate attention.
Entergy Arkansas demand charges destroying school district budget
Helen, this is exactly why I push schools to invest in building automation systems. MLGW Schedule GSB customers face similar challenges. The simultaneous 7:30am startup is killing you. Even simple time-of-day scheduling to stagger equipment starts over 45-60 minutes would cut demand charges in half. Most districts can get state energy efficiency grants to fund the upgrades.
SCE Schedule TOU-GS-3 here in California - schools are tough because they need quick morning warm-up before students arrive. Solution is pre-cooling and thermal mass strategies. Start HVAC at 5:30am on reduced load, bring buildings down to 70-72 degrees, then coast through morning demand peak using thermal mass. Buildings stay comfortable and you avoid the demand spike. Saves 60-80% on demand charges.
Pacific Power territory - worked with several Oregon school districts on this exact issue. The key is understanding that demand charges are based on peak 15-minute intervals, not total energy use. Spreading the same HVAC load over longer time periods dramatically reduces peak demand. Ian's pre-cooling strategy works great if you have thermal mass in the building construction.
Helen, have you considered demand response programs? Most utilities offer incentives for schools to shed load during peak periods. Entergy should have programs available. Also look into thermal energy storage - ice systems that make cooling at night when rates are low. Higher upfront cost but eliminates summer demand charges completely. Arkansas often has state funding for school energy projects.
OG&E Schedule OGS here in Oklahoma - schools are 40% of my business. The biggest win is usually upgrading from basic thermostats to programmable controls with staging capability. Even simple 7-day programmable stats with staggered start times can cut demand by 200kW+ across a district. Payback is usually under 2 years just from demand charge savings.
Avista schools deal with similar issues in Washington. Helen, the other strategy is optimizing scheduling around utility rate periods. If Entergy's demand charges vary by time of day, shift non-essential loads like gym ventilation and cafeteria equipment to off-peak hours. Every kW you can shift away from peak periods reduces annual demand charges significantly.
Georgia Power Schedule PL-1 schools - another option is district-wide demand limiting. Install master demand controllers that communicate between schools and shed loads when district-wide demand approaches limits. Might shut down non-essential HVAC in empty classrooms during peak periods. Requires good communication systems but can save massive amounts on demand charges.
Thanks everyone for the suggestions. We're moving forward with a pilot program at three schools to install basic staging controls and pre-cooling strategies. Also applied for Arkansas Department of Energy efficiency grants to fund building automation upgrades district-wide. Randy, I'll check on Entergy's demand response programs - hadn't considered those options before.
PPL Schedule GP-Large here in Pennsylvania - schools should also consider solar + storage combinations. Federal and state tax incentives make the economics attractive and battery storage eliminates morning demand spikes completely. We have several districts saving $50,000+ annually with properly sized solar+storage systems. Worth getting feasibility studies from multiple vendors.
Duke Energy Ohio schools face identical challenges. Sylvia's solar+storage suggestion is solid but make sure you understand net metering rules and demand charge treatment. Some utilities don't allow battery discharge to offset demand charges. Need to verify the economics work under your specific rate schedule before committing to expensive storage systems.
Helen, one more thought - consider thermal modeling software to optimize your pre-cooling strategies. Programs like EnergyPlus or eQuest can simulate different HVAC scheduling scenarios and predict demand impacts before you implement changes. Helps avoid trial-and-error approaches that might disrupt school operations. Many engineering firms offer this service for $5,000-10,000 per district.
Ian, that's a great suggestion about thermal modeling. The district architect mentioned having access to energy simulation software through the state university engineering department. Might be able to get student help with modeling different scenarios as a class project. Could save consulting fees and give us detailed analysis of various demand management strategies.
Helen, excellent approach using university resources. Many engineering schools have energy audit programs where students work on real projects under faculty supervision. You get professional-quality analysis at no cost and students get hands-on experience. Win-win situation. Make sure to specify that you need demand analysis specifically, not just energy efficiency recommendations. The demand component is critical for your application.