ExCoil

Engineering Blog

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

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(26)
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.

Design·Mar 5·8 min

Heat Exchanger Design Software: What Engineers Need in a Modern Sizing Tool

Discover the essential features of modern heat exchanger design software. Learn how web-based tools with 3D visualization and multi-refrigerant support improve sizing.

Refrigeration·Mar 8·11 min

How to Size a DX Evaporator Coil: Step-by-Step Engineering Guide

Learn how to size DX evaporator coils with this step-by-step engineering guide. Covers air-side and refrigerant-side heat transfer, NTU, and a worked example.

Theory·Mar 12·10 min

LMTD vs NTU-Effectiveness: Choosing the Right Heat Exchanger Calculation Method

Learn the differences between LMTD vs NTU method for heat exchanger calculation. Compare formulas, crossflow correction, and when to use each method.

Fundamentals·Mar 16·9 min

Overall Heat Transfer Coefficient (U-Value): How to Calculate It for Finned Tube Coils

Learn how to calculate the overall heat transfer coefficient (U-value) for finned tube coils. Explore thermal resistances, formulas, and typical U-values.

Refrigeration·Mar 20·12 min

Air-Cooled Condenser Sizing: A Practical Guide for Refrigeration Engineers

Learn how to size air-cooled condensers using the 3-zone model. Master desuperheating, condensing, and subcooling with ExCoil condenser design software.

HVAC·Mar 25·9 min

Chilled Water Coil Selection: Engineering Calculations for AHU Design

Learn how to perform chilled water coil selection for AHUs. This complete guide covers water flow rates, wet coil detection, and glycol correction factors.

Design·Mar 29·9 min

Coil Selection Software: 5 Critical Features Every HVAC Engineer Should Demand

Discover the 5 critical features every HVAC engineer needs in coil selection software, from multi-fluid support to accurate wet coil analysis and 3D models.

Theory·Apr 3·10 min

Pressure Drop Calculations in Heat Exchangers: Air-Side and Tube-Side Methods

Learn how to perform a pressure drop calculation heat exchanger analysis. Explore air-side and tube-side methods, Wang-Chi-Chang, and Gnielinski correlations.

Advanced·Apr 10·8 min

How to Validate Heat Exchanger Calculations: Energy Balance and Error Analysis

Learn how to validate heat exchanger calculations and ensure energy balance. Discover common errors and how ExCoil software guarantees design accuracy.

Design·Apr 18·9 min

Thermal Design Software for HVAC: From Spreadsheets to Engineering-Grade Tools

Discover why spreadsheets fail for heat exchanger design and how modern thermal design software offers validated correlations, 3D visualization, and better ROI.

What Coil Design Validation Software Should Do

What Coil Design Validation Software Should Do

Coil design validation software helps HVAC&R teams verify DX evaporator and condenser performance with engineering-grade thermal analysis.

How to Calculate Condenser Capacity

How to Calculate Condenser Capacity

Learn how to calculate condenser capacity using refrigerant mass flow, enthalpy change, and heat rejection factors for accurate HVAC&R design.

How to Model DX Evaporator Performance

How to Model DX Evaporator Performance

Learn how to model DX evaporator performance with engineering-grade inputs, coil circuitry, superheat, airflow, and refrigerant states.

What Refrigeration Coil Performance Software Does

What Refrigeration Coil Performance Software Does

Refrigeration coil performance software helps HVAC&R engineers model DX evaporators and condensers with greater accuracy, speed, and confidence.

Heat Exchanger Thermal Calculation Basics

Heat Exchanger Thermal Calculation Basics

Heat exchanger thermal calculation for HVAC&R engineers: methods, inputs, limits, and why accurate coil modeling matters in DX design.

Choosing HVAC Coil Design Software

Choosing HVAC Coil Design Software

Learn what HVAC coil design software should deliver for DX evaporator and condenser analysis, from thermal accuracy to workflow fit.

Condenser Thermal Analysis Software That Fits

Condenser Thermal Analysis Software That Fits

Condenser thermal analysis software helps HVAC&R engineers model coil performance, validate designs, and reduce risk in condenser sizing.

DX Evaporator Performance Modeling Basics

DX Evaporator Performance Modeling Basics

DX evaporator performance modeling helps engineers predict coil capacity, pressure drop, superheat, and risk under real operating conditions.