Evgenii Konkin (@evgeniikonkin)

Equal Friction Sized the Duct Perfectly. The Noise Made the Space Unusable.

Tags: HVAC, Mechanical Engineering, Ductwork, Building Systems An architect designed a high-end law firm office with 9-foot ceilings and minimal bulkheads. The mechanical engineer used the equal fric

1h ago · 4 min readcalcengineer.hashnode.dev

The Restaurant Door You Cannot Open and the Kitchen Hood That Does Not Capture Smoke. Both Are the Same CFM Problem.

Tags: HVAC, Mechanical Engineering, Ventilation, Building Systems A restaurant owner calls about two complaints. First, customers say the front door is hard to open. Second, cooking smoke drifts into

3d ago · 4 min readcalcengineer.hashnode.dev

The Building Was Running the Compressor When the Outdoor Air Could Have Cooled It for Free.

Tags: HVAC, Mechanical Engineering, Energy Efficiency, Building Systems A 50,000 square foot office building in Charlotte, NC ran its chillers year-round. In December, with outdoor temperatures at 45

5d ago · 4 min readcalcengineer.hashnode.dev

The Electrician Used the Single-Phase Formula on a Three-Phase Panel. The Generator Was 73% Too Small.

Tags: Electrical Engineering, Power Systems, Industrial, Three Phase A small manufacturing shop needed a backup generator. The electrician looked at the main panel: 200A service, 480V, three-phase. H

Oct 15 · 4 min readcalcengineer.hashnode.dev

Rectangular or Round? The Duct Shape Decision That Doubles Your Friction Loss.

Tags: HVAC, Mechanical Engineering, Building Systems, Ductwork A mechanical engineer selects a 12-inch round duct for a branch run. It carries 680 CFM at 0.08 in. w.c. per 100 feet. Clean, simple, co

Oct 13 · 4 min readcalcengineer.hashnode.dev

Evgenii Konkin

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Available for

Evgenii Konkin's blogs

Equal Friction Sized the Duct Perfectly. The Noise Made the Space Unusable.

The Restaurant Door You Cannot Open and the Kitchen Hood That Does Not Capture Smoke. Both Are the Same CFM Problem.

The Building Was Running the Compressor When the Outdoor Air Could Have Cooled It for Free.

The Electrician Used the Single-Phase Formula on a Three-Phase Panel. The Generator Was 73% Too Small.

Rectangular or Round? The Duct Shape Decision That Doubles Your Friction Loss.

Evgenii Konkin

About

Available for

Evgenii Konkin's blogs

Equal Friction Sized the Duct Perfectly. The Noise Made the Space Unusable.

The Restaurant Door You Cannot Open and the Kitchen Hood That Does Not Capture Smoke. Both Are the Same CFM Problem.

The Building Was Running the Compressor When the Outdoor Air Could Have Cooled It for Free.

The Electrician Used the Single-Phase Formula on a Three-Phase Panel. The Generator Was 73% Too Small.

Rectangular or Round? The Duct Shape Decision That Doubles Your Friction Loss.

Evgenii Konkin

About

Available for

Evgenii Konkin's blogs

Equal Friction Sized the Duct Perfectly. The Noise Made the Space Unusable.

The Restaurant Door You Cannot Open and the Kitchen Hood That Does Not Capture Smoke. Both Are the Same CFM Problem.

The Building Was Running the Compressor When the Outdoor Air Could Have Cooled It for Free.

The Electrician Used the Single-Phase Formula on a Three-Phase Panel. The Generator Was 73% Too Small.

Rectangular or Round? The Duct Shape Decision That Doubles Your Friction Loss.

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Evgenii Konkin

About

Available for

Evgenii Konkin's blogs

Equal Friction Sized the Duct Perfectly. The Noise Made the Space Unusable.

The Restaurant Door You Cannot Open and the Kitchen Hood That Does Not Capture Smoke. Both Are the Same CFM Problem.

The Building Was Running the Compressor When the Outdoor Air Could Have Cooled It for Free.

The Electrician Used the Single-Phase Formula on a Three-Phase Panel. The Generator Was 73% Too Small.

Rectangular or Round? The Duct Shape Decision That Doubles Your Friction Loss.