Entry Details
| Organization: | Dalkia US Chillers Services LLC |
| Login ID: | phebby.pasturan@dalkia-me.com |
| Category applied for: | O&M PROVIDER OF THE YEAR (CHILLED WATER SYSTEMS) |
| Submission date: | 25-Oct-2024 |
| Submission Entry: | 1.) What systemic transformation are you able to report as an O&M provider for chilled water systems?Answer: Dalkia provides full energy conservation approach culminating in complete energy solution guaranteeing plants operate at/below Design Kw per ton and we've been delivering this to all District Cooling customers. KPIs introduced in operation like plant COP, energy optimization, chilled water production availability at any required time significantly optimized operation & achieve concrete results helping clients reach good performance on technical equipment. We pioneered Chiller Re-Commissioning and results were recognized by our clients and stakeholders. As part of O&M contract with Kingdom Tower, one of the most iconic project in Saudi Arabia, our O&M approach follows operational excellence with Energy Efficiency perspective, starting by implementing “DESC” Dalkia Energy Saving Center aimed towards implementing Energy efficiency. The O&M contract include management of 4000 RT plant, we provided comprehensive study to elevate plant operation by introducing CPO & CPM within the plant and implementing control strategies aiming towards achieving better kw/RT. A recommissioning plan also has been provided to enhance performance of the plant. Meanwhile, the team is operating the plant with the TES tank in a philosophy that aims of achieving the best kw/RT. As summary, we have capitalized Dalkia’s expertise not just in O&M but also in Energy Efficiency and District Cooling to help clients generate considerable new savings & decrease significant OPEX. As a well-known expert in O&M, Dalkia ensures excellent cooling plant management, labor force quality, O&M of MEP, safety & occupational health 2.) What strategies have you adopted to achieve maximum level of system performance while respecting chiller flow, temperature limits and occupant comfort? (52)Answer: Dalkia as a Large Tonnage Chiller Specialist and ESCo is uniquely positioned as a specialist O&M provider and employ several key strategies. In this region, chillers consume 65% to 75% of plants’ total power consumption. We have clear understanding of chillers needs regarding reliability and energy efficiency, allowing us to implement solutions to improve chillers and ancillary equipment's efficiency through enhanced maintenance, operational strategies, upgrades and retrofits. We optimize system operations using real-time data and advanced control systems & implement VFDs on pumps and fans to adjust speeds based on demand. Robust preventive maintenance program ensures all components run efficiently, data analytics tools help monitor performance and identify trends for proactive adjustments. We explore energy recovery options and we balance cooling loads across multiple chillers to enhance efficiency. Finally, we collaborate closely with clients during design phase and review performance metrics to drive continuous improvement ensuring sustainability & occupant satisfaction 3.) What measures have you taken to ensure accurate cooling tower control and an optimised total system energy approach, which are seen as essential in an efficient chiller plant? (53)Answer: We utilize advanced control algorithms that continuously monitor and adjust cooling tower & chiller operation based on real-time environmental conditions and system demand. We always apply condenser relief to chillers we operate and maintain for not only improved energy performance but chiller safety as well. Regular maintenance and inspections are conducted to ensure all components function efficiently. We incorporate data analytics to track performance metrics and identify areas for improvement, enabling proactive adjustments. We have a propriety software with our agreement with Smardt/Killtech where we can run any plant connected through our energy insight program through a virtual Chiller Plant Energy Conservation System. With Energy & Utility Insight, we continue to monitor all chiller and ancillary performance Kw per Ton, cost to produce a Ton, total utility cost. Our software is a state-of-the-art, diagnostic service that provides the ability to document, monitor evaluate and manage chiller system performance. 4.) What water treatment protocols have you followed to ensure that the discharge does not contaminate surface and ground waters? What do you do to prevent direct aspiration into the atmosphere, which could be inhaled by people that are exposed to the mist created by cooling tower drift? (54)Answer: At every plant we operate, our goal is to install and utilize a Non-Chemical water treatment system. The primary goals of advanced water treatment are to prevent mineral scale formation, control biological activity, and inhibit corrosion. These problems traditionally are addressed by chemical additives but are difficult to administer, monitor, and control. These are also discharged to environment where they can contaminate surface and ground waters, concentrate in water treatment plant residuals, and directly aspirated by people exposed to the mist created by cooling tower drift. To resolve these problems without using chemicals, we recommends and install, operate and maintains the Clearwater Dolphin Non-chemical water treatment technology. This technology also allows us to increase cooling tower Cycles of Concentration, substantially reducing make-up and blowdown water requirements and associated water cost, reduce carbon emissions associated with water production and distribution associated with water savings. Document: Non-chemical Water Treatment Case Study_ISF Qatar. 5.) How have you prevented a solution from becoming a problem? For instance, VFDs have been known to cause high-frequency voltage spikes in the motor windings. What do you do to anticipate such situations and other similar situations to give comprehensive and lasting solutions, as opposed to inadvertently creating vulnerabilities? (55)Answer: VFD retrofits has been around the region for many years but there has been proliferation of companies installing VFD’s on HVAC equipment including chillers which often resulted in premature motor failure. What we do as a company & in fact Dan Mizesko also wrote these steps to insure proper VFD retrofits in his column “License to Chill” in Climate Control Magazine, the first thing that should be understood is if the motor you are applying the VFD to is able to have a VFD installed on it. Example, a Single-Phase motor should not have a VFD installed on it. Some motors are specifically designed to run on VFD power, while others need few components added to be compatible. We ensure to understand motor capabilities and limitations before installing a VFD. We also always check the following: Motor Winding Insulation, Bearings, Speed Ratings, Lead Length, etc. Document: Understanding VFD Installation. 6.) What retro-commissioning projects have you handled to improve the chiller’s kW/ton performance? (56)Answer: Our energy saving solutions are motivated on getting the industry to understand that until chiller operational improvements are number one priority, the industry will not really be energy efficient. Example, one of our projects: Empire State Building New York’s successful chiller efficiency increase through Chiller Recommissioning. 7.) What steps have you taken to ensure the cleanliness of heat transfer surfaces? What improvements in plant performance are you able to report through your interventions? (57)Answer: A chiller’s efficiency is affected most by its resistance to heat transfer. Having a full and complete knowledge of components related to the overall heat transfer, we employ the following best practices, among others: • Use qualified water treatment specialists • clean condenser and evaporator tubes regularly • clean water side strainers • Eddy current tubes every 3 years • employ condenser filtration • efficient water treatment programs. We observed significant improvements in plant performance, including enhanced heat transfer efficiency, reduced energy consumption, and increased system reliability. Clients report reduction in operational costs and extended equipment lifespan. Maintaining clean heat transfer surfaces led to lower maintenance requirements and fewer unscheduled outages, contributing to a more sustainable and efficient operation overall. We also recommend recommissioning to eliminate issues, post recommissioning we recommend we recommend automatic tube cleaning systems and OAM purge units to keep refrigerant charges oil and moisture free. |
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| References: | CCAUAE2407 || phebby.pasturan@dalkia-me.com |