LOTUS STHE

Design shell-and-tube heat exchangers in 10 minutes instead of days LOTUS STHE — a cloud solution that takes shell-and-tube heat exchanger design to a fundamentally new level.

More variants. Less routine. Deeper understanding. LOTUS STHE helps you move beyond simple calculations and choose the best solution from many strong alternatives.

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Gallery

LOTUS STHE UI

Interface screenshots arranged sequentially — from the project workspace to the final report. Click any screenshot to view larger.

New Design Requirements

Solution Calibration II

Fine-tuning workflow

3D Charts

Interactive visualization

Reports

Auto-generated output

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3D Visualization

Heat Exchanger 3D heat process view

The following shows a 3D rendering of the thermal field inside the STHE shell-and-tube heat exchanger, derived from the LOTUS segmented (sector-by-sector) computational approach.

Current Calculation Capabilities

Thermal-Hydraulic Calculation

Thermal-Hydraulic report screenshot — Sample report

Temperature from -70°C to 650°C

Pressure up to 16 MPa (gauge)

Shell Diameter from 159 to 3200 mm

Tube Diameter from 10 to 37 mm

Tube Length from 1000 to 12000 mm

TEMA Configurations

Front: A, B, C, N, D, L, M, P, S, T, U Shell: E, F, G, H, J, K, X Rear: L, M, N, P, S, T, U

Orientation

horizontal vertical

Mass-Dimensional Calculation

Mass-dimensional sketch report screenshot — Preview (in development)

Temperature from -70°C to 650°C

Pressure up to 16 MPa (gauge)

Shell Diameter from 159 to 3200 mm

Tube Diameter from 10 to 37 mm

Tube Length from 1000 to 12000 mm

TEMA Configurations

Front: A, B, C, N, D, L, M, P, S, T, U Shell: E, F, G, H, J, K, X Rear: L, M, N, P, S, T, U

Orientation

horizontal vertical

Engineering Documentation & Code Compliance

From calculations to production-ready deliverables — generated automatically with consistent data across reports, drawings, and BOM.

Automated Working Drawings Package

SOON

Generate complete ASME VIII-1, TEMA, and ISO 12944 compliant drawing packages in seconds — from calculation to production-ready documentation with zero manual CAD work.

Automated working drawings — Working drawings

General arrangement drawings
Shell, tube bundle, and component details
Automatic Bill of Materials (BOM)
Export to PDF, DWG, DXF formats
100% data consistency — no transcription errors

ASME Section VIII Strength Report

SOON

Comprehensive mechanical integrity verification with detailed code compliance checks. Every calculation validated against ASME Section VIII Division 1 requirements.

ASME Section VIII strength report — ASME VIII-1 checks

Shell side calculations (UG-27)
Tube side verification (UHX-3)
Baffles & internals checks (UG-45)
Nozzle reinforcement analysis (UG-44)
Detailed margin calculations with clear PASS/FAIL status

Comparison

Upgrade your workflow.

Whether you're moving from spreadsheets or complementing legacy software, LOTUS STHE delivers results you can't get elsewhere.

vs. Manual Calculations & Excel

For small & medium engineering teams

Faster Safer

Task	Manual / Excel	LOTUS STHE
Find Optimal Geometry	From 1 hour to days of manual iterations	< 10 minutes, automatically
Human error reduction in TEMA calculations	High risk of calculation mistakes (human factor)	Risk eliminated – fully automated & compliant
Generate Drawings & BOM	Separate manual CAD work	Auto-generated instantly

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vs. HTRI / HYSYS EDR

For large design bureaus looking for an expert edge

Expert Cloud

Capability	ASPEN EDR, HTRI	LOTUS STHE
Solution Variety	Provides a single configuration	✓ Generates a grid of fundamentally different configurations to choose from
UI convenience for Experts	Manual comparison	✓ Drastically reduces labour costs and saves time
Education for Non-Experts	Steep learning curve, limited guidance	✓ Provides insight into solving thermal problems, broadens horizons and understanding of intensification paths
Cloud-Based (No Install)	—	✓ Access anywhere

Designed to complement (or replace) legacy workflows with an expert-driven decision layer.

Want the same results on your next project?

Run a trial and compare outputs (reports, drawings, and BOM) side-by-side.

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Why Choose

LOTUS STHE Opportunities

Expert Solution Search System

An expert system that explores many fundamentally different configurations to quickly find the best candidates — built on 20+ years of heat exchanger design experience.

Intensified Variant Calculation

Each proposed variant is optimized for the maximum allowable velocity while meeting hydraulic and vibration limits — enabled by dynamic baffle spacing, variable baffle-cut selection, and tubes count tuning.

Bill of Materials Generation

Automatic generation of detailed bill of materials for procurement and manufacturing documentation.

Preliminary Design Drawing

Generate preliminary engineering drawings ready for detailed design and manufacturing processes.

Integrated Education System

Adapted interface for non-specialists with built-in educational materials and guided workflows.

Cloud-Based Solution

Access from anywhere, no installation required. Automatic updates and secure data storage in the cloud.

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Free access until Aug 31, 2026. 47 spots left.

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No credit card required

Cloud-based — no installation needed

Expert support included