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Brazed heat exchangers

Brazed heat exchangers
16Pages

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A product catalogue for refrigeration Brazed heat exchangers

2 The brazed plate heat exchanger (BHE) is a well-established component in a refrigeration plant. In refrigeration plants where Alfa Laval BHEs are installed, typical equipment includes: • Chiller: Cools water or brine and rejects the heat to air or water. The water is transported by a hydraulic system through different types of heat exchanger to cool air in an air conditioning system or to cool manufacturing or industrial processes. Two basic systems are normally used to drive chillers: a compressor driven by an electric motor, based on a vapour compression refrigeration cycle; or a...

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3 Benefits Extensive range of BHE models providing wide range of cooling capacities from 0.5 to 600 kW. Equalancer system provides a heat transfer surface saving of –20% compared to BHE with traditional distribution system. –40% m3/kW space saving due to the compact design of BHE compared to Shell and Tube heat exchangers. +7% water chiller COP due to high BHE performance compared to traditional heat exchangers. Rapid response to changes in temperature due to small hold-up volume and lower refrigerant charge. Patented innovations, the Equalancer and Dualaced systems, give high heat transfer...

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4 The Alfa Laval brazed heat exchanger • Compact and durable • Easy to install • Cost efficient Developed in the late seventies, the Alfa Laval BHE is the original brazed plate heat exchanger. The BHE concept is a variation on the traditional plate and frame heat exchanger, but without gaskets and frame parts. Material The brazed plate heat exchanger (BHE) consists of thin corrugated stainless steel plates which are vacuum brazed together using copper as the brazing material. Copper brazed units can be used for numerous of applications. However, for food applications and applications...

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5 Flow principle The basic flow principle in a brazed heat exchanger for HVAC applications is parallel and current flow to achieve the most efficient heat transfer process. In a single pass design all connections are located on one side of the heat exchanger, making installation very easy. Evaporator flow principle The channels formed between the corrugated plates and corners are arranged so that the two media flow through alternate channels, always in opposite directions (counter current flow). The two phase refrigerant (vapour + liquid) enters the bottom left of the exchanger with a...

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6 The real dual circuit patented by Alfa Laval in a solution with diagonal flow is obtained by means of pressed plates. The BHE can be connected with two independent refrigerant circuits. The special design ensures that each refrigerant circuit is in contact with the entire water flow. The main advantage is that at partial load (only one compressor running) water cooling is uniform and performance is maximized. Alfa Laval has implemented the Dualaced real dual circuit (DQ) in the AC80, 130, 250 and 350 BHE models. Dualaced system Alfa Laval Research & Development has developed innovative...

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7 Alfa Laval is leading the trend towards optimal quality. We do it with advanced production technology in high volumes. We do it with new technology through constant research and development. We do it through deliveries and service. As a leading global manufacturer we do it by offering a complete range of heat exchangers. Our knowledge gives you the best solutions, products with higher technical performance and a focus on energy savings. Quality must prevail through the whole chain from development to aftersales. All our brazed heat exchangers are individually leak and pressure tested to...

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CB26/27 Ext. threaded (ISO 228/1-G) Ext. threaded (ISO 228/1-G) Ext. threaded (ISO 228/1-G) Ext. threaded (ISO 228/1-G) S3 S4 S1-S2 , T1-T2 CB76 Internal soldering AC50 AC10 A21 3/4” Internal soldering Ref IN Ref OUT Water side S3 S3 S4 S4 S1-S2 T1-T2 H21 R21 H21 R21 ODS 1”1/8 1”1/4 – 12UNF ODS 1”1/8 1”1/4 – 12UNF Internal soldering Rotalock Internal soldering Rotalock POSITION 8 Dimensional data Standard connections NAME SIZE TYPE STD POSITION NAME B21 1” SIZE TYPE Ref IN Ref OUT Water side H21 R21 H21 R21 ODS 1”1/8 1”1/4 - 12UNF ODS 1”1/8 1”1/4 - 12UNF Internal soldering Rotalock Internal...

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14 Accessories Cleaning-In-Place (CIP) All types of heat exchangers need to be cleaned regularly to remove deposits such as scale, sludge and microorganisms. Alfa-CIP is a convenient solution that carefully removes the deposit on all heat transfer surfaces in the heat exchanger. Alfa-CIP 75, 200 and 400 are constructed in stainless steel using high quality components (pumps, valves etc.) according to ISO 9001 and with the CE-mark. The smaller units Alfa-CIP 20 and 40 are made of industrial grade plastic. Alfa-CIP is mobile due to its compact design. The units have reversible flow, and...

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Alfa Laval in brief Alfa Laval is a leading global provider of specialized products and engineering solutions. Our equipment, systems and services are dedicated to assisting customers in optimizing the performance of their processes. Time and time again. We help them heat, cool, separate and transport products such as oil, water, chemicals, beverages, foodstuff, starch and pharmaceuticals. Our worldwide organization works closely with customers in almost 100 countries to help them stay ahead. How to contact Alfa Laval Up-to-date Alfa Laval contact details for all countries are always...

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Brazed heat exchangers 16Pages

Catalog excerpts

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Brazed heat exchangers
16Pages