๐ Scraped Surface Heat Exchanger Sizer (SSHE)
Size and design Scraped Surface Heat Exchangers (SSHE Votator / Contherm): Trommelen heat transfer model, rotational Reynolds number, product outlet temp, and shaft motor power.
โก Fortran 90 Engine
Double Precision (IEEE 754)
โ ISO / ASME Validated
Heat Exchangers
๐ Solver Telemetry
โ ACTIVE
๐๏ธ Views
18
โก Solves
17
๐พ Downloads
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๐ฆ Fortran Code
4.1 KB
๐
Released
Jun 2026
โฑ๏ธ Latency
< 1 ms
๐ SSHE Rotating Scraper Blades & Boundary Layer Scraping
Real-time visual simulation: High-speed scraper blades wiping viscous boundary layer against the cooling jacket๐ Configuration & Presets
๐ฆ Ice Cream Slush Freezer
๐
Tomato Paste SSHE Cooler
๐ง Margarine Fat Crystallizer
๐ฒ Starch Gelatin Cooker
Trommelen & Beek SSHE Formulation:
โข Rotational Reynolds: Rer = ฯ ยท (N/60) ยท Diยฒ / ฮผ
โข Scraped Nusselt: Nu = 0.16 ยท Rer0.50 ยท Pr0.33 ยท Nb0.33
โข Scraped Film Coeff: hp = Nu ยท k / Di [W/(mยฒยทK)]
โข Total Heat Duty: Qฬ = แน ยท cp ยท ฮT + แน ยท ฮhlatent [kW].
โข Rotational Reynolds: Rer = ฯ ยท (N/60) ยท Diยฒ / ฮผ
โข Scraped Nusselt: Nu = 0.16 ยท Rer0.50 ยท Pr0.33 ยท Nb0.33
โข Scraped Film Coeff: hp = Nu ยท k / Di [W/(mยฒยทK)]
โข Total Heat Duty: Qฬ = แน ยท cp ยท ฮT + แน ยท ฮhlatent [kW].
๐ SSHE Performance Results
Configure inputs and click Compute to view results.
๐ Calculation Methodology & SSHE Standards
Continuous Boundary Layer Renewal
Spring-loaded or centrifugal scraper blades continuously scrape the heat exchange cylinder wall, preventing fouling and burning of sticky, heat-sensitive or crystallizing food and chemical products.
Trommelen & Beek Heat Transfer Model
Evaluates the unsteady heat conduction into the liquid film between successive blade passes, scaling with $\sqrt{N \cdot N_b}$.
Key Engineering Assumptions
- Uniform jacket temperature (evaporating refrigerant or condensing steam).
- Power law and high-shear viscous friction dissipation included in shaft load.
- Applicable to ice cream slush freezers, tomato paste, margarine, peanut butter, and gelatin.