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AREAS OF EXPERTISE: * Electric Motor * Electric Distribution * Electric Machine Design *Induction Motor *Standart Test, *ANSYS *Motor-CAD *BLDC Motor * Sync. Reluctance Motor *Axial Flux Motor I participated in efficient electric vehicle races during my undergraduate education. Since then, I have been professionally designing electric motors. After preparing for the electric vehicle competition for 2 years, I wrote my graduation thesis on electric motor design. Then, I took part in the design, production and testing phases of the industrial electric motor factory for 1 year. I worked as an R&D specialist of synchronous reluctance and asynchronous electric motors. I am currently working as a network operations specialist in an electricity distribution company and I continue to design electric motors as a freelance.

Passionate and skilled Thermal System Design Engineer with a robust track record in modeling and optimizing Environmental Control Systems (ECS). Leveraging advanced tools like Simcenter Amesim for 1D modeling, I've mastered the intricacies of thermal dynamics, multi-phase flows, and environmental controls. My expertise extends to CFD analysis using Ansys Fluent, SpaceClaim, and Star CCM+, where I excel in both transient and steady-state thermal and flow simulations. Adept at various meshing techniques, I deliver precise and impactful results in thermal system design and analysis. Ready to drive efficiency and innovation in your next project.

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 engineer end-to-end spatial data pipelines and custom WebGIS platforms. My focus is on high-level geospatial architecture—solving structural bottlenecks to build repeatable workflows, clean spatial databases, and practical mapping systems that operational teams can actually use. Recent US project work includes address matching and territory planning for operational teams, public facing GIS maps for policy and exhibition use in Omaha, property and building height analysis in Los Angeles, and a browser based weather graphics platform built with MapLibre, radar layers, timeline controls, and export ready map views. International work includes site selection analysis in Germany, parcel and location intelligence workflows, PostGIS and QGIS topology cleanup, UK air quality grid matching, raster processing, and WebGIS tools built with MapLibre, Google Maps API, AWS, and spatial databases. I can support projects involving GIS analysis, WebGIS dashboards, PostGIS workflows, raster and remote sensing analysis, automated geospatial pipelines, and custom mapping tools. If you need a one time analysis, a repeatable GIS workflow, or a full WebGIS prototype, I can take the project from raw data to final deliverable with a clear technical process.

Dear Clients, Please Kindly Read This Before Starting a Project When you contact me, there are generally two possibilities: either you know exactly what you need, or you need professional guidance to determine what you need. If you know what you need: Provide your requirements, and I will review the scope, complexity, deliverables, and provide an estimated price and timeline. If the project must strictly follow your own workflow, however, I cannot provide a fixed price or timeline based on it because I do not control or define that workflow. Such work is accepted on an hourly basis only. Projects performed using my own workflow are quoted as fixed-price projects. I do not provide my own workflow on an hourly basis, as my hourly time is not intended to become open-ended training or a way of transferring my professional methodology. For the same reason, please avoid asking which software or applications I use. My workflow and tools are part of my professional methodology. You define the result and requirements; I determine the appropriate workflow and tools to achieve them. If you do not know what you need: Then our discussion is a consultation, not an interview. Any video call before a contract is signed. is considered a consultation, regardless of how it is described. • 1-hour video consultation: $100 • Up to 24 hours of consultation through Upwork messages regarding one specific subject: $50 consultation contract Technical Work Technical work is different from regular artistic production and is not automatically calculated using my standard production hourly rate. Technical work may involve planning, calculations, analysis, testing, problem-solving, and specialized technical processes, even when the final execution itself takes only a few minutes. Source Files Source files are not automatically included with final deliverables. They contain editable working structures and can provide reusable access to the methodology and technical setup behind the work. Therefore, source files are treated separately and are subject to a separate fee, starting from three times the total project price, depending on the project and source content. (It is industry standard which can be checked by google as well) Please do not request source files free of charge unless explicitly included in the agreed scope. Before Hiring I do not provide unpaid project-specific demos or test work before a contract. My skills and experience can be evaluated through my Upwork profile, portfolio, and previous client feedback. All project-related communication and negotiations should remain within Upwork until a contract is established. Moving negotiations or project communication outside Upwork before a contract will violate Upwork's Terms of Service and may result in account restrictions or other action. “A good perfume speaks for itself; it does not need the perfume seller to tell you that it smells good.” Takavach Rafizadeh