DIESEL GENERATORS RUNNING WITHOUT A HYBRID ENERGY SYSTEM:
More often than not, diesel generators spend a lot of their service life running inefficiently on low loads creating unnecessary pollution and fuel waste. The first graph shows a typical asymmetric load profile of a power generator running 24 hrs.
- The diesel generator will be operating between 6% and 75% of its capacity.
- It runs inefficiently for 60% of the time.
- Diesel generators consume more fuel per kWh, compared to when operating between 60-80% of capacity.
Understandably, diesel generators are often over specified, meaning they frequently run at less than 25% capacity. Typically, the same diesel generator providing the higher daytime power, is continually running 24/7 to provide a lower overnight load. Consuming large amounts of diesel fuel overnight, unnecessarily. The second graph shows the diesel generator load profile where the Hybrid Energy System takes over the night time low loads and switches the generator off saving fuel, protecting the generator from wet stacking, providing silent periods and reducing emissions.
DIESEL GENERATORS RUNNING WITH A HYBRID ENERGY SYSTEM
The Hybrid Energy System Node Energy Management Software monitors the diesel generator and load status, autonomously turning the generator on and off according to predetermined load or time parameters significantly reducing generator noise, emissions, fuel waste and operational costs.
SCENARIO 1: TIMER SETTINGS The Hybrid Energy System controls the operation of the diesel generator. The power generator runs constantly through the day and then the HES turns the diesel generator off at night, running the site silently on the stored energy. Example: 6am – 6pm on generator, and 6pm – 6am HES stored energy.
SCENARIO 2: LOAD SENSING The Hybrid Energy System automatically switches off the diesel generator when it is running at low loads and powers the load with stored energy. Or, the HES is the primary power source for long periods of low load and switches the generator on for higher load demands; an example of this would be oilfield well head operation. The Hybrid Energy System re-charges when the diesel generator is running for higher loads and thus fuel consumption is optimized.
SCENARIO 3: CONSTANT LOW LOAD The HES is the primary power source, and only switches on the diesel generator to re-charge the batteries. The diesel generator runs at a much higher load when charging the Hybrid Energy System, improving fuel efficiency.