ExCoil

Engineering Blog

Technical articles on heat exchanger sizing, design, and optimization for HVAC and refrigeration professionals.

All articles

(16)
Fundamentals·Jan 15·12 min

Heat Exchanger Sizing Fundamentals: A Complete Engineering Guide

Learn the essential principles of heat exchanger sizing, including LMTD method, NTU-effectiveness approach, and key design parameters for optimal thermal performance.

Design·Jan 12·15 min

Finned Tube Coil Design: Optimizing Air-Side Heat Transfer

Comprehensive guide to designing finned tube heat exchangers for HVAC and refrigeration applications, including fin efficiency, tube patterns, and air-side correlations.

Refrigeration·Jan 10·14 min

Evaporator Coil Sizing for Refrigeration Systems

Step-by-step guide to sizing DX evaporator coils, including superheat control, refrigerant selection, and capacity matching for commercial refrigeration.

HVAC·Jan 8·13 min

Air-Cooled Condenser Design for HVAC Applications

Learn how to design efficient air-cooled condensers, including desuperheating, condensing, and subcooling zones with practical examples.

HVAC·Jan 5·11 min

Chilled Water Coil Selection: AHU Design Guide

Complete guide to selecting and sizing chilled water coils for air handling units, including water flow rates, glycol effects, and dehumidification analysis.

Theory·Jan 3·16 min

Heat Transfer Coefficient Calculations: Correlations and Methods

In-depth guide to calculating heat transfer coefficients for various flow regimes, including single-phase, two-phase, and condensation correlations.

Design·Dec 28·10 min

Pressure Drop Calculations in Heat Exchangers

Comprehensive guide to calculating pressure drops on both tube-side and air-side of heat exchangers, including friction factors and minor losses.

Maintenance·Dec 20·9 min

Fouling in Heat Exchangers: Prevention and Mitigation

Understanding fouling mechanisms, their impact on heat exchanger performance, and practical strategies for prevention and cleaning.

Refrigeration·Dec 15·12 min

Refrigerant Selection Guide for Heat Exchanger Design

Comprehensive comparison of refrigerants for heat exchanger applications, including environmental impact, thermodynamic properties, and safety considerations.

Advanced·Dec 10·14 min

Coil Circuiting Optimization: Maximizing Heat Exchanger Performance

Advanced guide to optimizing coil circuiting for evaporators and condensers, including refrigerant distribution, pressure drop balancing, and thermal performance.

Design·Feb 5·10 min

Copper Tube & Aluminum Fin Coils: Why HVAC Relies on This Combination

Understand why copper tubes with aluminum fins dominate HVAC heat exchanger design. Explore thermal conductivity, corrosion resistance, manufacturing advantages, and cost-effectiveness.

HVAC·Feb 3·14 min

Coil Selection for Air Handling Units: A Step-by-Step Engineering Guide

Master the process of selecting and sizing heat exchanger coils for air handling units (AHUs). Covers cooling coils, heating coils, face velocity, and performance optimization.

Theory·Jan 28·15 min

Wet Coil Analysis: Understanding Dehumidification in Cooling Coils

Deep dive into wet coil heat transfer analysis using the enthalpy potential method. Learn how cooling coils remove moisture, calculate latent capacity, and optimize dehumidification performance.

Refrigeration·Jan 20·12 min

Low-GWP Refrigerants and Their Impact on Heat Exchanger Design

Explore how the transition to low-GWP refrigerants like R-32, R-454B, and R-290 affects heat exchanger sizing, materials, and safety requirements in HVAC and refrigeration systems.

Advanced·Jan 12·11 min

3D CAD and Simulation in Heat Exchanger Design: From Concept to Manufacturing

Learn how 3D CAD modeling, CFD simulation, and thermal analysis software are transforming heat exchanger design. Explore the workflow from conceptual design to manufacturing-ready models.

Maintenance·Jan 5·9 min

Heat Exchanger Maintenance: Preserving HVAC Coil Performance Over Time

Practical guide to maintaining finned tube heat exchangers in HVAC systems. Covers cleaning methods, fouling prevention, inspection schedules, and performance monitoring techniques.