Thermodynamics Engineer, Chiller New Product Development

XNRGY Climate Systems•Mesa, AZ

8d•Onsite

About The Position

As XNRGY scales its chiller portfolio, we need a dedicated thermodynamics expert embedded in the NPD team to accelerate product development cycles, improve system efficiency, and ensure our chiller architectures meet the rigorous performance and reliability standards demanded by hyperscale operators.

Requirements

B.S. in Mechanical Engineering required; M.S. with thermodynamics or thermal-fluids concentration strongly preferred
5–8 years of progressive experience in HVAC or chiller system design and development
Deep expertise in vapor compression cycles, heat transfer, psychrometrics, and fluid mechanics
Hands-on experience with chiller modeling tools (e.g., REFPROP, Coolpack, or proprietary simulation platforms)
Working knowledge of low-GWP refrigerants (R-454B, R-32, R-1234ze, R-513A)
Familiarity with ASHRAE Standards (15, 34, 90.1) and AHRI performance certification requirements
Experience in an engineered-to-order or custom manufacturing environment
First-principles engineering thinker with strong analytical rigor
Comfortable operating in a fast-paced, hypergrowth environment with shifting priorities
Collaborative, hands-on, and solutions-oriented
Strong written and verbal communication — able to present technical content to non-technical stakeholders

Nice To Haves

Exposure to data center cooling applications, including free cooling, economizer modes, and liquid cooling (CDU, rear-door, immersion)
Knowledge of PUE optimization and hyperscaler thermal infrastructure requirements
PE license or active pursuit

Responsibilities

Develop and optimize chiller system architectures using advanced thermodynamic principles, including vapor compression cycles, heat exchanger design, and refrigerant selection for low-GWP compliance
Build, validate, and continuously improve chiller performance models; execute thermodynamic cycle simulations across full operating envelopes including part-load and off-design conditions
Design and specify refrigerant piping, hydraulic circuits, and associated structural components in compliance with ASHRAE, AHRI, and applicable safety standards
Active contributor across the full new product development process: concept generation, feasibility analysis, prototype testing, performance validation, and production release
Define and execute calorimeter and field test protocols; analyze results and drive design iterations to meet performance targets
Partner closely with controls engineers, manufacturing engineers, procurement, and product management to ensure designs are producible, cost-effective, and on schedule
Monitor competitive chiller technology trends and emerging refrigerant regulations to inform roadmap decisions
Produce engineering calculations, technical reports, and design documentation to support certification and customer submittals