HVAC

When a centrifugal chiller goes into surge, it experiences an unstable operating condition where the compressor's flow rate drops below the minimum limit required for stable operation. This can cause several issues: Flow Reversal: The refrigerant flow can momentarily reverse due to insufficient pressure difference across the impeller. This reversal disrupts the normal flow pattern, causing the chiller to lose its cooling capacity temporarily. Pressure Fluctuations: Surge creates rapid fluctuations in pressure and flow, leading to vibrations and potentially damaging mechanical components such as the impeller, bearings, and seals. Noise and Vibration: The chiller produces loud noises and vibrations due to the erratic flow, which can harm the equipment and the surrounding environment. Reduced Efficiency: The chiller's efficiency drops significantly during surge, causing it to consume more energy while providing less cooling. Potential Damage: Prolonged surging can lead to mechanical wear and tear, ultimately resulting in equipment failure if not addressed promptly. Surge typically occurs when the chiller is operating under low load conditions or when the compressor's capacity and the system's demand are mismatched. To minimize surge, chiller systems are often equipped with control mechanisms that adjust the compressor's speed, guide vanes, or bypass valves to maintain stable operation. Thanks to Terrill Williamson with Insight Partners partners for the excellent video example.

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Seeking an HVAC Testing, Adjusting, & Balancing (TAB) Technician. Salary $35 - $50 an hour depending on experiance Full-time.  Cyber BMS Inc. Please email us contact@cyber-bms.com "Engineering Excellence, Elevated by Technology" Offering Engineering Services in the New York Tri-state Area. Job description: Cyber BMS is on the lookout for a proficient HVAC Testing, Adjusting, and Balancing (TAB) Technician with solid experience in HVAC technology. The ideal candidate should have in-depth knowledge and skills in balancing air and water systems, commissioning, and diagnosing issues with HVAC equipment in both commercial and industrial settings. In this position, the HVAC TAB Technician will be essential in optimizing the functionality and efficiency of heating, ventilation, and air conditioning units. Qualifications: Execute air and water balance tasks on HVAC systems, aligning with both industry benchmarks and specific project requirements. Demonstrate effective teamwork skills and manage interactions with external TAB service providers. Perform comprehensive performance assessments to ensure HVAC installations meet both design specifications and operational standards. Identify and resolve HVAC system problems, focusing on discrepancies in airflow, temperature, and pressure. Fine-tune, recalibrate, and mend HVAC components, including dampers, valves, and control mechanisms, to meet desired performance outcomes. Work in tandem with project leads, engineers, and building contractors to guarantee precise installation and commissioning of HVAC setups. Keep detailed documentation of balancing processes, diagnostic results, and system efficiency records, utilizing Microsoft Office for report generation in Excel and Word formats. Observe strict safety measures and comply with all applicable regulations and standards during all tasks. Keep abreast of the latest in HVAC technology and balancing methodologies. Hold certifications from NEBB or TABB. Possess a valid driver's license and Social Security Number. Have a minimum of 2 years of relevant experience.