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HPE S&T EVAPORATORS

HPE S&T EVAPORATORS

Product catalog summary

Applications: The document details the use of dry-expansion shell and tube evaporators in refrigeration systems for cooling liquids or brine solutions and in heat pumps for producing hot water. These exchangers are compatible with refrigerants such as HCFCs and HFCs, with cooling capacities ranging from 40 to 750 kW. Water connections are typically vertical but can be customized.

Materials: Constructed from high-quality materials meeting European pressure vessel standards, the exchangers use carbon steel for various components, copper for exchanger tubes, and asbestos-free gaskets. Custom materials are available upon request.

Accessories: Optional accessories include mounting supports, counter flanges, and insulation.

Standards and Testing: Exchangers undergo pressure tests on both refrigerant and water sides, adhering to ONDA standards or other codes. They comply with European safety codes and can be made to ASME standards upon request. Temperature and pressure limits are specified.

Selection and Installation: Guidelines for selecting exchangers based on fouling factors are provided, along with installation tips such as ensuring horizontal installation, proper air purging, and maintaining appropriate pressure. The use of water with high chlorine content is discouraged, and the importance of using compatible fluids is emphasized.

Model Specifications: Detailed specifications for various models (HPE 42 to HPE 730) include capacity, flow rate, pressure drop, and dimensions. Nominal working conditions are specified for refrigerant R410A, with water inlet and outlet temperatures, evaporating and condensing temperatures, and fouling factors.

Specifications: The document provides detailed specifications for Shell & Tube Evaporators (HPE models) and Water Accumulators (WT models), including pressure drop, gas and water volume, total capacity, dimensions, and weight. Nominal working conditions specify the use of refrigerant R410A, with specific temperatures for water inlet, outlet, evaporation, and condensation.

Procedures: Installation and operational procedures for evaporators and accumulators are outlined, emphasizing proper installation to ensure optimal performance and reduce costs associated with water piping and insulation.

Standards and Norms: Products comply with Italian laws and European community standards as of the order confirmation date. Design temperatures and pressures for water accumulators are specified.

Recommendations: Recommendations include using ONDA "WT" series accumulators for compact and easy installation, ensuring proper control of outlet fluid temperature, and maintaining optimal exchanger performance.

Warranty: ONDA S.p.A. provides an 18-month warranty from the delivery date, covering defects in materials and workmanship. The warranty excludes issues from natural wear, unauthorized repairs, improper use, and non-compliance with specified functional and environmental parameters.

Key Data from Tables: Tables provide detailed dimensions and capacities for each model, including flow rates, pressure drops, and volumes of gas and water. They also list the number of supports and weights for each water accumulator model.

Critical Information: Adhering to specified installation guidelines and operational parameters is critical to maintain the warranty and ensure the longevity and efficiency of the equipment.

Non-Conformity and Liability: ONDA S.p.A. is not liable for damages resulting from non-compliance with laws and regulations unless explicitly stated. The client must indemnify ONDA S.p.A. against any claims arising from non-compliance.

Warranty Details: The warranty covers defects in materials and workmanship for 18 months. Defects must be reported within 10 days of receipt or discovery. Products are warranted to comply with Italian and European laws at the time of order confirmation. The warranty excludes defects from natural wear, unauthorized modifications, improper use, and non-compliance with installation specifications. It does not cover non-compliance with laws enacted after order confirmation or specific local laws unless specified by the client.

Client Obligations: Clients must not sell non-compliant products and must indemnify ONDA S.p.A. against any resulting claims.

Liability Limitations: ONDA S.p.A. is not liable for direct, indirect, or incidental damages from defective products, except in cases of gross negligence or willful misconduct.

Catalog excerpts

SHELL & TUBE EVAPORATORS

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SHELL & TUBE EVAPORATORS INFORMAZIONI TECNICHE TECHNICAL INFORMATION Le principali applicazioni dei nostri scambiatori ad espansione secca sono il raffreddamento di liquidi o miscele incongelabili in impianti di refrigerazione e di produzione di acqua calda in impianti a pompa di calore. I refrigeranti impiegabili sono: HCFC, HFC, ed altri, purché compatibili con i materiali di costruzione. Gli scambiatori a fascio tubiero ONDA della serie HPE hanno capacità frigorifera, a condizioni standard, compresa tra circa 40 e oltre 750 kW per modelli a catalogo, con un numero di circuiti lato refrigerante...

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CONSIGLI PER UNA CORRETTA SELEZIONE HINTS FOR A CORRECT SELECTION Il fattore di sporcamento (f.f.) è un elemento importante per il dimensionamento di uno scambiatore, quindi si suggerisce una scelta corretta del suo valore in base ai seguenti parametri: - acqua dolce normale in circuito chiuso f.f. = 0.000043 m2K/W - acqua di circuito aperto f.f. = 0.000086 m2K/W - soluzioni contenenti glicole < 40% f.f. = 0.000086 m2K/W - soluzioni contenenti glicole > 40% f.f. = 0.000172 m2K/W Allo scopo di evitare danni allo scambiatore in caso di basse temperature, si evidenziano i punti di congelamento delle...

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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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MODELLO / MODEL SHELL & TUBE EVAPORATORS Portata / Flow rate Perdita di carico / Pressure drop Potenza / Capacity Potenza totale = somma di tutti i circuiti / Total capacity = sum of all circuits P Conn. acqua / Water connections 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 2.2 - 7/2019

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MODELLO / MODEL Portata / Flow rate Perdita di carico / Pressure drop Potenza / Capacity Potenza totale = somma di tutti i circuiti / Total capacity = sum of all circuits Conn. acqua / Water connections 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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MODELLO / MODEL SHELL & TUBE EVAPORATORS Portata / Flow rate Perdita di carico / Pressure drop Potenza / Capacity Potenza totale = somma di tutti i circuiti / Total capacity = sum of all circuits Conn. acqua / Water connections 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 2.2 - 7/2019

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MODELLO / MODEL Portata / Flow rate Perdita di carico / Pressure drop Potenza / Capacity Potenza totale = somma di tutti i circuiti / Total capacity = sum of all circuits P Conn. acqua / Water connections 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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MODELLO / MODEL SHELL & TUBE EVAPORATORS Portata / Flow rate Perdita di carico / Pressure drop Potenza / Capacity Potenza totale = somma di tutti i circuiti / Total capacity = sum of all circuits Conn. acqua / Water connections 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 2.2 - 7/2019

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