The client approached us about the custom design and fabrication of an RNG skid system. To tolerate the harsh oceanic environment, the skid design required the use of marine-resistant components and marine-grade materials. Additionally, a feed compressor skid had to be designed to fit inside of a separation membrane container. These unusual space requirements presented significant design challenges for piping and equipment placement. All of this had to be accomplished with very short lead times, as the customer had a short and inflexible project timeline.
To begin, our engineering team took the customer’s process diagram and created a piping and instrumentation diagram (P&ID) to detail the necessary components of the skid. After approval, we developed a 3D model that addressed the space limitations for the feed compressor and examined the feasibility of the design. The project designer, Meghan Settlemyer, had to get creative with the piping and equipment placement to accommodate the restrictive dimensions faced by the application.
Once confident that our solution would function as intended, we designed and programmed a control system for the feed compressor. The customer also specified that our compressor control system be able to integrate with their existing control system, which we were able to achieve.
Ultimately, our solution provided the following:
Feed compressor skid to increase gas pressure upstream of the membranes.
Feed blower and dehydrator skid, which was outfitted with an enclosure for sounddampening and additional environmental protection.
Standalone vacuum blower assembly with silencers and supports for the permeate side of the membrane
Complex heat exchanger network to minimize the chiller size and energy consumption, which included an ambient air heat exchanger and several brazed plate exchangers
The use of hot compressor discharge gas to reheat the chilled, dehydrated gas, which eliminated the need for additional heat sources
316 stainless steel piping to resist the corrosive effects of the harsh marine environment
As a result of the work we did, Hawaii Gas was able to meet its deadline for injecting gas into the utility pipeline, and Hawaii Gas held a blessing ceremony to mark the completion of the project. This ceremony included tours by local and state dignitaries and employees of Hawaii Gas.
Working With Glauber
Hawaii Gas’ project contractor chose Glauber Equipment for this project because we successfully completed many RNG projects in the past,
and because we have an extensive knowledge of compression systems, previous experience with custom outdoor shelters for harsh environments,
and end-to-end service from design to installation. As experts in the gas markets for the landfill and biogas industries,
our engineers bring more than 50 years of expertise to the table.
To read more about Glauber’s line of RNG Skid Systems, download our eBook, RNG Skid Systems Overview.
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