Tablet Capsule Counting Machine
The capsule counting machine adopts electromagnet vibration effect, stable and reliable; Scientific design, simple, easy to use, small size, light weight, suitable for pharmaceutical, hospital, food and other industries, for capsules, tablets, particles and other drugs or food counting. This machine is small in size, light in weight, accurate in counting and easy to operate. The contact surface of counting items are made of stainless steel, which is an ideal special equipment for counting bottled, bagged and canned products in various industries.
1. The number of counting particles can be set anywhere from 0 to 9999;
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2. The stainless steel of the machine complies with GMP standards;
3. Simple operation, no special training required;
4. Precision particle counting, equipped with special electric eye protection device;
5. Rotary counting design, fast and smooth operation;
6. The rotating particle counting speed can be stepless adjusted according to the manual bottling speed;
7. Vacuum cleaner is installed inside the machine to avoid the influence of dust on the machine;
8. Vibration feeding design can stepless adjust the vibration frequency of the hopper.
Repowering Legacy PV and ESS Systems
Over the past few years, Pure Power Engineering has witnessed a growing demand for services related to upgrading older solar photovoltaic (PV) and energy storage systems. The primary aim of repowering is to swap out outdated or underperforming equipment while preserving or restoring the remaining components that still meet original design specifications and performance criteria. This process requires a blend of technical precision and creative thinking, combining detailed forensic assessments, industry knowledge, and innovative problem-solving.
The majority of the systems currently being upgraded are around 10 to 12 years old. During this time, numerous equipment manufacturers have entered and exited the market, and the standards and designs for products and systems have undergone significant evolution. There have also been substantial updates to safety regulations and electrical codes, particularly concerning system voltages, grounding methods, DC arc-fault detection, rapid shutdown protocols, and PV conductor wiring practices.
Upgrading these older systems is far more intricate than constructing entirely new ones. It's both a design challenge and an operational one, requiring careful planning and execution. Here, we'll briefly explore some of the factors driving the trend toward repowering and provide some practical advice for tackling the inevitable hurdles faced during such projects.
Why Are People Repowering Their Systems?
Pure Power Engineering collaborates with various stakeholders on repowering initiatives. Although there are multiple reasons why repowering might be financially beneficial, we’ll focus on two key scenarios. First, long-term owners may seek to boost their financial returns. Second, project developers or engineering, procurement, and construction (EPC) firms might identify opportunities to turn existing clients into recurring customers.
One common reason for repowering is to enhance profitability. While PV modules typically carry warranties spanning several decades, power conditioning equipment usually comes with a 10-year guarantee. Once this warranty expires, maintaining legacy inverters becomes increasingly expensive, especially when spare parts are no longer available. In such cases, owners might find it advantageous to upgrade their systems to maximize energy output and cut ongoing maintenance expenses. Modern transformerless string inverters operate at higher efficiencies (96%-99%), converting solar-generated direct current (DC) into alternating current (AC) synchronized with the grid, compared to traditional transformer-based central inverters (90%-95%). Additionally, switching to string inverters reduces performance risks and cuts down on repair and replacement costs.
Another motivation for repowering is to foster repeat business. Changes in renewable energy incentives can create opportunities for repowering. For instance, many older PV systems in New Jersey once benefited from the state’s generous but now-defunct Solar Renewable Energy Credit (SREC) market. Recently, New Jersey has introduced successor programs like the Transition Renewable Energy Certificate (TREC) and the newly announced Successor Solar Incentive (SuSI). A similar situation exists in Massachusetts. In these markets, astute developers and EPC companies quickly demonstrate to clients how adding parallel connections to existing systems can boost solar project revenues. Under this arrangement, one connection adheres to the legacy incentive scheme, while any additional capacity connects under the newer program.
Pro Tips for Navigating Repowering Challenges
Repowering existing systems is more complex than starting fresh. Sometimes, existing PV circuits must be redesigned to accommodate contemporary inverters, while the mounting structure and interconnection remain intact. In other cases, repowering involves replacing inverters, modules, and other balance-of-system components, which could necessitate altering the mounting structure or the interconnection. Despite the unique and site-specific complications that arise, they are always manageable with the help of a skilled engineering partner. Below are some practical tips for successfully repowering legacy solar and energy storage systems.
Never Assume the As-Built Drawings Are Accurate; Verify the Actual Conditions
Industry standards, best practices, and contractual obligations have advanced significantly over the past decade. This is evident when comparing the as-built drawings for older systems with the actual field conditions. In the early days of solar, some installed systems lacked accurate as-built documentation. Furthermore, all the repairs and modifications carried out over the last decade or so are frequently absent from official records. Therefore, the initial step in repowering any project is to conduct a thorough survey and document the existing conditions. Besides listing major equipment, it’s essential to document conductor gauge and type, as well as conduit sizes, quantities, and routes.
Coordinate Closely with the Authority Having Jurisdiction (AHJ) and Obtain Permits When Necessary
Unlike routine operations and maintenance tasks, comprehensive system repowering activities typically require review and approval by the AHJ. As part of the engineering process, Pure Power flags any existing conditions that might not comply with current code requirements. A typical example is that older systems often employ color-coding conventions differing from those in the latest editions of the National Electrical Code. Some AHJs may permit the reuse of these circuits if the conductors are re-labeled using electrical tape. Others may insist on removing and replacing the existing conductors. In rooftop installations, repowering activities might retroactively trigger rapid shutdown requirements; if so, these considerations will guide the design process. Engage in discussions with AHJs early and often to ensure that repowering projects are planned and executed correctly from the outset.
Structural Modifications Require Supervision by a Professional Engineer
The advantage of replacing existing modules is that project stakeholders can increase system capacity simultaneously. For instance, a legacy system might feature 200-watt modules with 15% efficiency, whereas a modern system could incorporate 400-watt modules with 20% efficiency. In this case, repowering involves deciding how best to adapt an existing ground-mount or carport structure given the new module dimensions. This process inevitably includes new shading analyses and strategic structural adjustments, possibly altering purlin orientation or extending structural elements. It may also require trenching near existing foundations. These structural changes or foundation modifications must be reviewed and supervised by a professional engineer. Additionally, the original equipment manufacturer may need to approve certain types of structural modifications, such as plans to install new string inverters on ground-mount piles instead of legacy combiner boxes.
Listed Equipment Modifications Need Field Evaluation and Certification
Certain types of product modifications also necessitate field evaluations and certifications. For instance, today’s commercial and industrial (C&I) string inverters are designed for use with 1,000-volt nominal PV source circuits, whereas older systems integrate 600-volt-rated modules. Early consultation with equipment suppliers during the design phase ensures that modern inverters will function with legacy system components. To improve maximum power point tracking efficiencies, an original equipment manufacturer (OEM) might adjust the DC operating parameters for a listed inverter in some cases, such as reducing the native AC output voltage. While these parameter adjustments resolve interoperability issues, a field evaluation service will then need to confirm that the modified equipment complies with relevant product safety standards. Similarly, field modifications to legacy mounting systems might trigger field evaluations and certifications to ensure that the installation meets current product safety standards.
Engineering Experience and Expertise Minimize Project Risks
Legacy systems serve as reminders that solar technologies have advanced rapidly over a relatively short period. An approach that works for a PV system equipped with Satcon inverters won’t necessarily apply to bipolar PV arrays integrated with Advanced Energy inverters. Ultimately, the best way to sidestep the pitfalls associated with repowering projects is to select a qualified and experienced engineering partner who will ask the right questions upfront to deliver a repowering solution tailored to specific project goals. As a full-service engineering firm specializing in solar and energy storage projects, Pure Power is uniquely positioned to collaborate with stakeholders to breathe new life into aging systems. With over a decade of industry-specific expertise as an organization—and nearly 400 years of combined experience as a team—there’s little in the realm of commercial and industrial (C&I) and utility-scale solar and solar-plus-storage applications that we haven’t encountered.
Looking for more expert advice for your C&I solar and energy storage projects? Contact Pure Power Engineering to learn more about our value-engineered design and construction drawing services.