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Data Center Electrical Design | AI Infrastructure | 10+ Years I design the power backbone of the AI era, from 10 MW single building data centers to 450 MW phased campuses. WHAT I DO ✅ AI/HPC infrastructure design: NVIDIA GB200/GB300 NVL72 deployments, high density GPU racks up to 140 kW, POD level power architecture, liquid cooling (DLC) coordination ✅ Electrical concept and Basis of Design: SLDs, MV/LV distribution, generator, transformer and UPS sizing ✅ Redundancy strategies: N+1, block redundant and distributed architectures, Uptime Tier III/IV alignment ✅ Master planning and block fit: site capacity studies, phased campus layouts, utility coordination ✅ Feasibility and retrofit: conversion of existing buildings into data centers, capacity optimization for live facilities SELECTED EXPERIENCE 450 MW phased AI campus: master planning and electrical strategy (US) 70 MW AI data center: full electrical concept, SLD development and power flow verification 120 MW (Ashburn, VA) and 140 MW (Houston, TX) hyperscale campus designs GPU PODs above 1.2 MW IT for AI training clusters STANDARDS AND TOOLS Uptime Institute • IEEE • BICSI 002 • ASHRAE • NEC (NFPA 70) • TIA-942 AutoCAD / AutoCAD Electrical, engineering calculation sheets, SketchUp Planning an AI factory, expanding a campus, or converting an existing building? Let's talk. I deliver documentation your contractors and utilities can actually build from.

Utility-Scale PV, hybrid solar systems, and microgrid solar + bessprojects require more than layouts and simulations. They require correct architecture, realistic assumptions, and systems that work in the field, not just on paper. I am a licensed Electrical Engineer with over 10 years of experience designing solar and battery energy systems across residential, C&I, and large-scale projects. My focus is on technically robust and financially optimized systems, especially where PV, BESS, generators, and grid interaction must operate as one integrated solution. Core Expertise: • Utility-Scale PV Design Plant layout optimization, DC/AC sizing, inverter configuration, cable sizing, and loss minimization. • Solar + BESS Engineering Battery sizing based on load profile and operational strategy (peak shaving, backup, arbitrage), including system configuration and protection philosophy. • Hybrid & Microgrid Systems Integration of PV, BESS, gensets, and grid connection with clear operational logic and reliability-focused design. • Performance & Yield Analysis Advanced PVsyst simulations, shading studies, loss breakdown, and realistic energy yield forecasting. • Electrical Design & SLDs Implementation-ready single-line diagrams, protection schemes, and detailed electrical layouts. • Technical Review & Risk Assessment Independent design review and performance validation before construction or investment decisions. I work with industry-standard tools such as PVsyst, PVCase, Aurora Solar, OpenSolar, AutoCAD, and SketchUp but software is only part of the process. Sound engineering judgment and real-world constraints define the final design. If you are developing a utility-scale project or planning a hybrid/microgrid system, I can support you from concept design to detailed engineering with a focus on performance, compliance, and long-term reliability. Design it correctly. Optimize it properly. Build it with confidence. Kaan Yıldız

Reliable online HVAC & MEP freelancer highly responsive, client-focused, and committed to clear communication throughout every project. I’m a Senior Mechanical Engineer with 19+ years of experience in HVAC & MEP design for hospitals, commercial buildings, hotels, offices, and industrial facilities. I deliver clear, code-aligned design packages you can build from: load calculations (HAP), equipment selection, duct/pipe sizing, layouts, and coordinated AutoCAD drawings. What you get: • Heating & cooling load calculations (HAP) + summary reports • HVAC system design (ducted/VRF/mini-split) and equipment schedules • Ductwork/pipework layouts, risers, details, BOQ support • MEP coordination and clash-ready drafting (AutoCAD) If your project is urgent, I can start immediately and deliver an initial layout within 24–48 hours after receiving the DWG and requirements. I help clients design and deliver HVAC and MEP systems that work in real buildings, not just on drawings. I have designed HVAC and mechanical systems for hospitals, hotels, office buildings, commercial developments, and residential projects, including high-risk and technically sensitive environments such as operating theatres, isolation rooms, and critical facilities. My practical background includes: • HVAC system design (chilled water, VRF/VRV, DX, ventilation, heat recovery) • Load calculations, equipment selection, and energy-efficient system strategies • Healthcare, hotel, office, commercial, and residential MEP coordination • Code-compliant designs aligned with ASHRAE, CIBSE, HTM, NFPA, and international standards • Design reviews, value engineering, and constructability-focused solutions • Supporting permit submissions, tender packages, and contractor clarifications What clients value most is that I design systems with execution in mind. My solutions are buildable, coordinated, and realistic, reducing site issues, redesign cycles, and operational problems. I can support projects as: • HVAC & Mechanical Designer • MEP Design Reviewer • Technical Advisor for healthcare and complex buildings • Short-term problem-solver for urgent or stuck projects If you need a reliable engineer who understands both design intent and site realities, I can help. Designing building systems is not just about calculations and drawings. It’s about safety, comfort, efficiency, and long-term performance — whether the project is a hospital, hotel, office building, or industrial facility. I am a Mechanical & MEP Engineer with 19+ years of experience, delivering HVAC and building services solutions for healthcare, hospitality, commercial, and industrial projects across Europe and the Middle East. I work across the full project lifecycle — from concept and tender design to construction supervision, testing & commissioning, and final handover — ensuring systems are practical, compliant, and buildable on site. My background includes complex environments such as hospitals and healthcare facilities, as well as hotels, office buildings, and industrial/workshop projects, where airflow control, safety, comfort, and reliability are critical. ⸻ Core Expertise • HVAC & mechanical design for hospitals, hotels, offices, and industrial facilities • Critical environments: operating theatres, ICUs, isolation rooms, clean areas • Comfort ventilation, exhaust systems, dust and fume extraction • Medical gases, firefighting, drainage, water supply, and utilities • Compliance with ASHRAE, CIBSE, HTM, NFPA, JCI and international codes • Coordination with architectural, structural, electrical, and site teams ⸻ Project & Leadership Experience • Founder of Nilgoon Consulting Engineers, delivering 40+ MEP projects • Consultant for WHO-guided airborne isolation room projects (Ministry of Health, 2018) • Speaker at the National Congress on Hospital Construction & Healthcare Management (2019) • Proven ability to deliver projects on quality, schedule, and regulatory compliance ⸻ How I Can Help You Clients work with me to: • Design or review HVAC & MEP systems • Solve airflow, pressure, comfort, or compliance issues • Upgrade existing buildings to meet international standards • Support projects from early design through commissioning I am available for design packages, technical reviews, troubleshooting, and long-term support.

I am a green building consultant specializing in LEED certification and energy modeling. As a civil engineer with a master’s degree focused on green buildings, I am a LEED Accredited Professional and Building Energy Modeling Professional (BEMP). I have been working as a green building consultant since 2011 and have completed projects in various countries, including but not limited to the USA, Japan, Israel, and Turkey. My LEED projects have more than 20 million square feet of building area and seven are certified as LEED Platinum. I provide comprehensive green building consultancy services with my specialized knowledge and years of hands-on experience. I actively cooperate with international clients and provide remote services by maximizing communication and efficiency. My clients are building developers, designers, contractors, engineers, and consultants who seek specialized green building/LEED assistance and energy modeling services for their projects. I use Designbuilder and EnergyPlus software which is developed by the US Department of Energy and is one of the most widely accepted modeling software. Designbuilder is a powerful tool for energy modeling and also daylight simulations. As an active member of USGBC, I participated in the pilot credit committee and provided LEED and energy modeling training in various organizations including Green Building Councils in Turkey and Georgia, Chambers of Turkish Engineers and Architects, several universities, and multinational corporations. Certified LEED AP BD+C, O+M since 2011 and ASHRAE BEMP since 2019. I have a B.Sc. degree in Civil Engineering and M.Sc. degree in green building and energy efficiency. My English TOEFL score is 107/120. My services: - Energy modeling (energy simulation) using Designbuilder and EnergyPlus software - Energy performance reporting and compliance documentation - LEED certification, green building, and energy efficiency consultancy - LEED certification management and documentation - Daylight simulation - CFD and natural ventilation analysis - Urban shadow analysis - Building life-cycle analysis

I am an experienced environmental engineer and LEED AP specializing in sustainability consulting, green building, and environmental reporting. My dual diploma from Istanbul Technical University and the University at Buffalo provided a solid academic foundation, which I have built upon through hands-on experience in climate change mitigation, renovation, and net-zero initiatives. I have led several EU-funded projects—including Horizon 2020 initiatives—focused on reducing carbon footprints and promoting sustainable practices. My expertise spans sustainability reporting, EcoVadis assessments, and ISO compliance, helping organizations achieve recognized green building certifications (LEED, WELL, EDGE) and implement robust environmental management systems. In addition to project management and consultancy, I have delivered over 10 workshops on green building and sustainability reporting, advocating for data-driven approaches to environmental performance. My work consistently supports organizations in lowering carbon emissions while embracing comprehensive sustainability strategies. I am committed to delivering practical, cost-effective solutions that enhance sustainability and environmental performance in the built environment. I look forward to helping you achieve your green building and sustainability goals. Sincerely, Büşra Çelik

Hello everyone! I'm honoured to introduce myself as one of the top Turkish mechanical engineers and content writers on Upwork. As an engineer, I specialize in HVAC, fire protection, natural gas installations, and energy management. In addition, I deliver exceptional content by leveraging my technical expertise and strong writing skills. I prioritize attention to detail, and meeting deadlines to ensure client satisfaction. Let's connect and bring your ideas to life! Best Regards, Yağız Koyan