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David Wilson

David Wilson

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Viewing 20 posts - 1 through 20 (of 83 total)
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  • David Wilson
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    You’re absolutely right — contamination happens long before fuel reaches the engine, so treating fuel as part of a holistic fuel management strategy is essential. In practice that means periodic fuel polishing and circulation through high-capacity diesel fuel filtration equipment to remove free water, emulsified moisture, sediments and microbial contaminants before transfer or refueling. Effective on-site methods include multi-stage filtration with depth and coalescing elements for solids and water separation, centrifugation for fast removal of fines and emulsions, and targeted microbiological control (tank cleaning, biocides and scrubbers) to prevent biofilm-related clogging of filters and injectors. Portable, cart-mounted polishers are particularly useful at transfer points and remote sites, and moisture testers at the tank or truck level let you decide when treatment is required.

    For a practical program, establish contamination limits and sampling intervals (ISO cleanliness targets), monitor moisture and particulate levels, and schedule polishing during receipt, prior to long-term storage, and before engine use. Use heavy-duty units rated for high-moisture feeds when dealing with watered fuels, keep tank vents and drains maintained, and integrate treatment data into your maintenance workflow so polishing becomes a preventive step rather than an emergency fix. This approach stabilizes fuel quality, extends storage life, reduces injector and pump wear, and lowers the risk of unexpected downtime across the whole fuel supply chain.

    David Wilson
    Member

    You’re right — sequencing multi-stage treatment and closing real-time feedback loops are decisive for consistent high performance. Systems designed for dark or heavily contaminated diesel combine pre-treatment to remove free water and mechanical solids with a multi-column adsorption stage to target unsaturated/aromatic hydrocarbons, asphalt‑resinous substances and sulfur/nitrogen/acid‑containing compounds. A unit like the CMM‑6RL uses six adsorption columns in sequence, automated control via a touch panel, and recommended upstream coalescing and solids removal to prevent filter clogging and keep throughput high; nominal polishing capacity is about 45 m³/h but will vary with feed quality.

    Equally important is condition monitoring and preventive maintenance: differential‑pressure, water‑content and turbidity sensors give early warning of saturated filters or spent adsorbent so you can intervene before performance falls off. The adsorbent in these systems is reusable (typically reactivated 300–500 times by controlled burning, with practical reactivation cycles up to ~19 hours) and emissions from reactivation are neutralized in a two‑stage carbon/catalytic system. For best results, follow a workflow that removes solids (e.g., a mechanical filter stage) and free/emulsified water before polishing, size coalescers and filters to your expected contamination load, monitor DP and water sensors continuously, and plan reactivation on condition rather than fixed hours.

    David Wilson
    Member

    Hours for small units; days-months for large HV/MV grid transformers depending on assets and availability.

    in reply to: What do power line transformers do? #332377
    David Wilson
    Member

    Pole/distribution transformers step medium voltage (e.g., 10-35 kV) to utilization voltage (120-400 V) for neighborhoods.

    in reply to: What is power losses of transformer? #332321
    David Wilson
    Member

    Losses = No-load (core + dielectric) + Load losses (I²R + stray + eddy). Expressed in W or kW and tested per IEC/IEEE standards.

    in reply to: What are the types of power transformers? #332319
    David Wilson
    Member

    By function: GSU, step-down, autotransformer, furnace, traction. By insulation: oil-immersed, dry-type. By cooling: ONAN, ONAF, OFAF, OFWF, GIT.

    in reply to: What is power distribution transformer? #332279
    David Wilson
    Member

    A distribution transformer steps MV feeders to LV for end users; focus on high efficiency at light load.

    David Wilson
    Member

    Oil filtration restores dielectric strength and removes moisture, particulates, and gases. Bushings are inspected for leakage currents, tracking, and contamination because bushing failures are a common cause of outages.

    David Wilson
    Member

    Utilities like Georgia Power enforce minimum clearances for poles, pad-mounts, and substation equipment to prevent flashover, vegetation contact, and public access hazards. Clearances vary by voltage class, enclosure type, and NEC/NESC standards, covering horizontal/vertical separations, working space, and approach distances for maintenance crews.

    David Wilson
    Member

    Technical presentations focus on ratings, vector groups, applications, loss evaluation, tap changing, cooling, protection relays, testing, commissioning, and digital monitoring. They condense complex design/operation topics for utilities or industrial stakeholders.

    David Wilson
    Member

    Substation step-down units convert transmission voltages to medium-voltage feeders for urban and industrial distribution.

    David Wilson
    Member

    Solar power plants feed inverter outputs into step-up transformers that raise voltage to medium or high-voltage levels for grid interconnection. These transformers must tolerate harmonic-rich inverter waveforms, rapid ramping, and bi-directional power flow during curtailment. Cooling, insulation, and vector group selection are tailored to utility codes and grid-tie standards.

    David Wilson
    Member

    Procurement occurs via OEM bids, distributor quotations, EPC sourcing, or refurbishers offering tested and warranted second-hand equipment.

    David Wilson
    Member

    Operation begins with loading the transformer’s active part onto a sliding carriage that enters the sealed furnace chamber. A vacuum is created, and a heating medium (technical oil or electric heaters) raises temperature within controlled limits. Pressure and temperature automation ensures even heating, moisture evaporation, vapor condensation, and safe system regulation until moisture removal targets are met.

    in reply to: What standards apply to power transformers? #330858
    David Wilson
    Member

    IEC 60076 series, IEEE C57 series, ANSI, ISO quality systems, and utility internal specifications govern design, testing, and performance.

    David Wilson
    Member

    Yes – GlobeCore does offer solutions for measuring the breakdown voltage (BDV) of transformer oil, but they are separate instruments rather than a standard built-in feature of TOR-5. While TOR-5 is focused on online monitoring of key oil parameters (and can estimate BDV trends based on those measurements), dedicated GlobeCore testers like TOR-60, TOR-80/80A, and TOR-100 are used for direct dielectric strength/BDV testing of transformer oil according to IEC/ASTM standards. These instruments provide automated, accurate breakdown voltage measurements up to set kV levels and can produce reports and trend data for maintenance decision-making.

    David Wilson
    Member

    Eaton Cooper series units are widely deployed in utility distribution systems, pad-mount installations, and underground networks for commercial and residential service.

    David Wilson
    Member

    Challenges include managing thermal hotspots, dielectric clearances, fault forces, short-circuit withstand, acoustic noise, cooling system optimization, OLTC reliability, transport weight limits, and meeting strict loss guarantees and standards.

    David Wilson
    Member

    Annotated pictures label components such as core and coil assembly, HV and LV bushings, OLTC cabinet, conservator, radiators, pressure relief devices, Buchholz relay, and oil level indicators. Such diagrams help students and technicians correlate physical parts with schematic symbols and understand the roles of each component. They also highlight maintenance points and safety devices that must be regularly inspected, making them useful for training and documentation in utility and industrial environments.

    David Wilson
    Member

    For a start-up making formulations that combine bitumen, kerosene, acids and amines you’ll want a compact, process-safe plant built around heated mixing vessels plus high‑shear homogenization and accurate dosing. Typical equipment includes insulated, steam- or electrically-heated stainless steel tanks with anchor agitators for low‑shear bulk blending and a rotor–stator disperser or colloid mill/inline high‑pressure homogenizer to produce stable emulsions and fine dispersions. Metering pumps for kerosene and liquid additives, pH and temperature probes, bag/inline filtration and vapor recovery or condensation for solvent control are essential for consistent product quality and environmental compliance.

    Material compatibility and safety drive design choices: use 316L stainless for most components, PTFE or rubber linings and corrosion‑resistant alloys (or special coatings) where strong acids are handled, and select seals and pump materials rated for hydrocarbons and amines. Sequence and controls matter: heat bitumen to lower viscosity, add kerosene slowly under agitation, dose acid/amine and emulsifier with closed‑loop pH control, then pass the blend through the homogenizer to achieve target droplet size and viscosity. Monitor viscosity, softening point/penetration (for bituminous products), particle size and pH as your QC checks, and install ATEX‑rated motors, grounding and adequate ventilation because kerosene is flammable. If you want, tell me target batch size, throughput and whether you’ll produce cationic or anionic emulsions and I’ll suggest specific GlobeCore modules and a basic plant layout that fits your formulations and safety requirements.

Viewing 20 posts - 1 through 20 (of 83 total)

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