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HDE S&T EVAPORATORS

HDE S&T EVAPORATORS

Product catalog summary

Introduction

The HDE series comprises dry expansion shell & tube evaporators with hairpin tubes, optimized for high-pressure refrigerants such as R32, R454B, and R410A. These units can function solely as evaporators for cooling or as dual-purpose evaporator/condenser units for heat pumps and combined cooling/heating systems.

Benefits

High design pressure capability up to 49 barg and 150°C for condenser operation.
Compact design reducing length by approximately 20-30% compared to previous models.
Multi-circuit configurations (3 or 4 circuits) available for shell diameters up to 508 mm.
Enhanced suitability for high-pressure and high-temperature applications.

Technical Information

The HDE units support a range of refrigerants including HFCs and HFOs compatible with the materials used. Cooling capacities range from about 30 kW to 1300 kW. Refrigerant circuits vary from 1 to 4 depending on shell diameter. Dimensions are indicative and subject to manufacturing tolerances and changes.

Materials

Heat exchange tubes: Copper
Baffles: Polymeric material
Tube sheet, header, shell, and connections: Carbon steel

Other materials can be supplied upon request, depending on production capabilities.

Accessories

Optional accessories include loose or welded mounting supports, water-side flanges and counter flanges, Victaulic quick coupling kits, and insulation to facilitate installation and integration.

Standards, Testing, and Operating Limits

The units comply with pressure vessel codes PED/CE 2014-68-UE and ASME VIII Division 1 for safety and tightness.

Function	Tube Side Pressure	Tube Side Temperature	Shell Side Pressure
Evaporator	31 barg	150 °C	10 barg
Evaporator/Condenser	49 barg	150 °C	10 barg

Installation and Operation

Detailed installation and maintenance instructions are provided in the respective manuals and must be followed to ensure proper operation.

Product Nomenclature and Components

Key components include water and refrigerant inlet/outlet connections, shell, header, gasket, and tubesheet. Nomenclature clarifies dimensions such as outside diameter (OD), soldering diameter (ODS), and ISO 228 gas thread standards.

Model Specifications and Performance Data

Models vary by pressure rating (31 or 49 bar) and refrigerant circuit count (1 to 4). Performance parameters include total cooling capacity (30 kW to 1300+ kW), water flow rate (approx. 25.8 to 225.5 m³/h), pressure drop (20 to 51 kPa), water and refrigerant volumes, and physical dimensions.

Nominal working conditions for performance data are standardized: refrigerant R32, water inlet 12°C, water outlet 7°C, evaporating temperature 4°C, superheating 5 K, condensing temperature 50°C, fouling factor 0.000043 m²·K/W.
Model sizes range from small (D=139 mm, 29-44 kW) to large (D=323-508 mm, up to 1303 kW).

Design Variants

Available with 1 to 4 refrigerant circuits and 1 or 2 pass configurations, allowing customization to system requirements.

Summary of Critical Parameters and Best Practices

Ensure refrigerant compatibility with materials to maintain system integrity.
Adhere strictly to design pressure and temperature limits for safety and compliance.
Use recommended nominal working conditions for system design and performance evaluation.
Follow installation and maintenance manuals carefully.
Consider optional accessories to ease installation and improve integration.

Technical Specifications of Shell & Tube Evaporators (HDE Series)

1. Nominal Working Conditions

Refrigerant: R32
Water inlet temperature: 7°C or 12°C depending on model
Water outlet temperature: 4°C or 7°C depending on model
Evaporating temperature: 4°C or 5°C
Superheating: 5 K
Condensing temperature: 50°C
Fouling factor: 0.000043 m²·K/W
Circuits and passes: 3 or 4 circuits, 2 passes

2. Model Variants and Performance Parameters

Total capacity ranges from 130 kW to 1314 kW.
Cooling capacity ranges from 43 to 372 tons of refrigeration.
Water flow rates between 25.8 m³/h and 225.5 m³/h.
Pressure drops vary from 20 kPa to 51 kPa.
Water volume ranges from 55 L to 428 L; refrigerant volume from 17 L to 183 L.
Weights range from 141 kg to 1093 kg.

3. Dimensions and Connections

Diameter (D): 219 mm to 508 mm.
Length (L): 2676 mm to 3488 mm.
Height (A): 2350 mm to 2950 mm.
Other dimensions (C, F, P, G, M) vary by model.
Water connections nominal diameters: DN 100 to DN 250.
Gas connections ODS sizes: 16 to 64.

4. Model Identification

Models are coded by pressure rating (31 or 49 bar) and circuit/pass configuration.

5. Warranty Conditions

18-month warranty from delivery covering material and workmanship defects.
Defects must be reported within 10 days of receipt or discovery.
Warranty covers repair or replacement at manufacturer’s discretion, Ex Works delivery.
Exclusions include natural wear, unauthorized modifications, improper use, overstress, non-compliance with specifications, improper installation, missing grounding, or client negligence.
Warranty excludes defects from laws/regulations enacted after order confirmation unless expressly requested.
Clients must not sell non-compliant products and must indemnify the manufacturer against claims.
Manufacturer disclaims liability for indirect/incidental damages except in cases of gross negligence or willful misconduct.

6. Contact and Manufacturing Locations

Headquarters and plants in Mussolente and Lonigo, Italy.
International offices: USA (Delaware, OH), Russia (Moscow region), Finland (Kangasala Tampere), China (Shanghai).
Contact details include phone numbers, emails, and websites for each office.

Summary

This document provides a comprehensive technical reference for Onda S.p.A.'s HDE series shell and tube evaporators designed for R32 refrigerant. It details specifications, performance data, dimensional information, design variants, and warranty terms. The document emphasizes adherence to nominal operating conditions, material compatibility, and safety standards to ensure optimal performance and compliance. Additionally, it provides full contact information for global offices to support customer inquiries and service.

Catalog excerpts

SHELL & TUBE EVAPORATORS

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HDE è un evaporatore ad espansione secca con tubi forcinati (BEU) ottimizzato per refrigeranti ad alta pressione come R32, R454B ed R410A. HDE presenta due design base: - funzionamento solo come evaporatore in impianti per solo raffreddamento - funzionamento come evaporatore e come condensatore in impianti come pompe di calore o unità polivalenti per raffreddamento e riscaldamento HDE is a dry expansion evaporator with hairpin tubes (BEU) optimized for high pressure refrigerants such as R32, R454B and R410A. HDE features two basic designs: - evaporator function in installations only cooling mode...

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SHELL & TUBE EVAPORATORS Connessione entrata acqua Water inlet connection Mantello Shell Connessione uscita refrigerante Refrigerant outlet connection Connessione entrata refrigerante Refrigerant inlet connection Piastra tubiera Tubesheet Testata Header Guarnizione Gasket

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Connessione uscita acqua Water outlet connection LEGENDA / NOMENCLATURE Diametro esterno Outside diameter ODS Diametro interno per saldobrasatura Outside soldering diameter GAS Filettattura ISO 228 gas cilindrica per tubi

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SHELL & TUBE EVAPORATORS 1 CIRCUITO / 4 PASSI Portata / Flow Rate Perdita di carico / Pressure drop MODELLO / MODEL 49 Bar Potenza totale / Total Capacity Volume H2O Volume Refrigerante Condizioni di lavoro nominali / Nominal working conditions °C °C °C K °C m2*K/W Refrigerante / Refrigerant Temp. ingresso acqua / Water inlet temp. Temp. uscita acqua / Water outlet temp. Temp. evaporazione / Evaporating temp. Surriscaldamento / Superheating Temp. condensazione / Condensing temp. Fatt. sporcamento / Fouling factor REV 1.0 - 11/2021

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Portata / Flow Rate Perdita di carico / Pressure drop MODELLO / MODEL 49 Bar Potenza totale / Total Capacity Volume H2O Volume Refrigerante Condizioni di lavoro nominali / Nominal working conditions °C °C °C K °C m2*K/W Refrigerante / Refrigerant Temp. ingresso acqua / Water inlet temp. Temp. uscita acqua / Water outlet temp. Temp. evaporazione / Evaporating temp. Surriscaldamento / Superheating Temp. condensazione / Condensing temp. Fatt. sporcamento / Fouling factor

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SHELL & TUBE EVAPORATORS 1-2 CIRCUITI / 2 PASSI Portata / Flow Rate Perdita di carico / Pressure drop MODELLO / MODEL 49 Bar Potenza totale / Total Capacity Volume H2O Volume Refrigerante Condizioni di lavoro nominali / Nominal working conditions °C °C °C K °C m2*K/W Refrigerante / Refrigerant Temp. ingresso acqua / Water inlet temp. Temp. uscita acqua / Water outlet temp. Temp. evaporazione / Evaporating temp. Surriscaldamento / Superheating Temp. condensazione / Condensing temp. Fatt. sporcamento / Fouling factor REV 1.0 - 11/2021

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Portata / Flow Rate Perdita di carico / Pressure drop Potenza totale / Total Capacity Volume H2O Volume Refrigerante Condizioni di lavoro nominali / Nominal working conditions °C °C °C K °C m2*K/W Refrigerante / Refrigerant Temp. ingresso acqua / Water inlet temp. Temp. uscita acqua / Water outlet temp. Temp. evaporazione / Evaporating temp. Surriscaldamento / Superheating Temp. condensazione / Condensing temp. Fatt. sporcamento / Fouling factor

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SHELL & TUBE EVAPORATORS 3 CIRCUITI / 2 PASSI Portata / Flow Rate Perdita di carico / Pressure drop Potenza totale / Total Capacity Volume H2O Volume Refrigerante Condizioni di lavoro nominali / Nominal working conditions °C °C °C K °C m2*K/W Refrigerante / Refrigerant Temp. ingresso acqua / Water inlet temp. Temp. uscita acqua / Water outlet temp. Temp. evaporazione / Evaporating temp. Surriscaldamento / Superheating Temp. condensazione / Condensing temp. Fatt. sporcamento / Fouling factor REV 1.0 - 11/2021

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SHELL & TUBE EVAPORATORS 4 CIRCUITI / 2 PASSI Portata / Flow Rate Perdita di carico / Pressure drop MODELLO / MODEL 49 Bar Potenza totale / Total Capacity Volume H2O Volume Refrigerante Condizioni di lavoro nominali / Nominal working conditions °C °C °C K °C m2*K/W Refrigerante / Refrigerant Temp. ingresso acqua / Water inlet temp. Temp. uscita acqua / Water outlet temp. Temp. evaporazione / Evaporating temp. Surriscaldamento / Superheating Temp. condensazione / Condensing temp. Fatt. sporcamento / Fouling factor REV 1.0 - 11/2021

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