Resources

ISO 9001 Quality Assurance Accreditation
October 28, 2016

The Management of HRS Heat Exchangers, S.L.U. (hereinafter HRS Heat Exchangers) understands quality to be an acceptable balance between the expectations and needs of their clients and the needs and interests of the organisation itself in the design and manufacture of heat exchangers and process plants. It is for this that the continuing satisfaction of…

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Advantages of Corrugated Tubes
August 17, 2016

Introduction A large number of industries use processes in which heat is transferred between different fluids (or gases). The basic principle of heat transfer is extremely simple: two fluids at different temperatures are placed in contact with a conductive barrier (the tube wall) and heat is transferred from the hotter fluid to the colder fluid…

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Aseptic Filling Fundamentals
August 17, 2016

General One of the things needed to produce a pasteurised product with a long life which can be distributed at ambient temperature is aseptic packaging. This technology differs from conventional canning techniques in that the containers are pre-sterilised and then filled with cold product in a cold environment in commercially sterile conditions, before being closed…

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Comparison of Laminar and Turbulent Flow
August 17, 2016

Heat Transfer Flow Regimes One of the important factors controlling heat transfer is the resistance to heat flow through the various “layers” that form the barrier between the two fluids. The driving force for heat transfer is the difference in temperature levels between the hot and cold fluids, the greater the difference the higher the rate…

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Fouling Factors in Heat Exchangers
August 17, 2016

The fouling factors to be used in the design of heat exchangers are normally specified by the client based on their experience of running the plant or process. If uncontrolled, levels of fouling can negate any benefits produced by careful heat exchanger design. The fouling factor represents the theoretical resistance to heat flow due to…

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Heat Transfer Fundamentals
August 17, 2016

Introduction As noted here, the basic principle of heat transfer is extremely simple, two fluids at different temperatures are placed in contact with a conductive barrier (the tube wall) and heat is transferred from the hotter fluid to the colder fluid until they reach the same temperature level. In industrial processes, this is carried out…

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How to Design a Tubular Heat Exchanger?
August 17, 2016

How to Design a Tubular Heat Exchanger At HRS Heat Exchangers we design tubular heat exchangers every day. This section provides an overview of the process. Step 1: Analysing the Application When we first receive an enquiry for a heat exchanger, the first step is to analyse the application. Is it a food industry application?…

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Thermal Treatment in Food Industry
August 17, 2016

The thermal treatment of food is necessary in order to: Reduce the microbiological flora present in the food Avoid alterations produced in the food by non-pathogenic micro-organisms Apply the appropriate amount of heating/cooling to each of the foods in question The four principal objectives of the application of thermal treatment are: Destroy micro-organisms which could…

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Types of Packaging for Foods and Beverages
August 17, 2016

Various types of aseptic packaging have been developed over the years as a result of different demands. This page highlights some of the key steps in the evolution of modern food packaging. Cans Some estimates suggest canned good account for up to 90% of some markets, although share is being lost to more modern forms…

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Acrylamide Reduction in Industrial Food
August 17, 2016

Acrylamide, also known as 2-propenamide or acrylic amide, is a chemical substance has a role in making polyacrylamide, which in turn is used in inks, in flocculants for water treatment, in cement production and the production of plastics. The World Health Organisation (WHO) has established a maximum level for drinking water of 0.5 mg/litre and…

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Pressure Equipment Directive 2014/68/EU Categorisation
August 17, 2016

Introduction to 2014/68/EU – European Pressure Equipment Directive (formally known as 97/23/EC)  All equipment that is pressurised to more than 0.5 Bar above atmospheric pressure must be assessed in accordance with the European Pressure Equipment Directive 2014/68/EU and if necessary designed and manufactured in accordance with the requirements contained within the Directive. This equipment can…

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