double-pipe heat exchanger Articles

  • Enhancement of heat and exergy transfer inside double pipe heat exchanger with conical tube

    Enhancement of heat and exergy transfers in double pipe exchangers with conical tubes is investigated. Different fluid combinations are selected. The momentum and energy equations for both fluids are solved mathematically and numerically. Both solutions are well matched. A parametric study including the effect of the thermal conductivity, thermal capacity and the tube to pipe diameters ratios is ...


    By Inderscience Publishers

  • Ataköy WWTP Project Turkiye - Case Study

    Customer: WTE (Germany) Project Name: Ataköy WWTP Capacity: 400.000 m³/ d Manufacturing year: 2008 Scope of supply ...


    By ASTIM A.S.

  • Thermo–economic analysis of heat pipe heat exchanger for waste heat recovery in thermal systems

    Thermo–economic analysis of Heat Pipe Heat Exchanger (HPHE) for waste heat recovery in thermal systems using the P1–P2 and NTU methods is presented. The optimum effectiveness of a HPHE is given as a polynomial equation, whereas the net savings and payback period are given in closed form to enable the HPHE designer to determine the optimised values directly. In addition to this, exergy analysis of ...


    By Inderscience Publishers

  • Failing Brine Piping Replaced at World`s Largest Ion Exchange Membrane Plant

    Fabricated Plastics Limited is headquartered in Maple, Ontario, located on the northern outskirts of Toronto. One of North America's largest custom composite and dual laminate fabrication companies. Fabricated Plastics is dynamic, energetic, creative and resourceful. Engineering design, problem solving and fabrication are world class with the result that Fabricated Plastics is frequently invited ...


    By Fabricated Plastics Limited

  • Albuquerque restaurant exchanges water softener for green Scalewatcher water conditioner

    Zorba’s Fine Greek Restaurant in Albuquerque, New Mexico, has saved money on water, maintenance and salt by replacing its water softener with the computerized, electronic, water-conditioner Scalewatcher® from Scalewatcher North America.  Three months after installing Scalewatcher, the restaurant was able to remove its bulky water softener but still retain the ...

  • Valves in Water System of Heating Air Condition

    Common valves in water system of heating air condition include gate valve, globe valve and butterfly valve.   Gate vale For its moderate length, rotary adjusting rod and good regulating performance, gate valve is widely utilized in large caliber pipes.   Globe valve Globe valve is suitable for small caliber pipes for its long length, ...

  • Quebec recovers heat energy from sewage in Baied`Urfe

    Energy recovery from municipal sewage and greywater offers cities a new reliable resource.  Erwin Schwartz of DDI Heat Exchangers Inc. reports on a novel application of rectangular, wide-gap heat exchangers that has worldwide potential. The Canadian company DDI Heat Exchangers Inc. installed, with the support of the Quebec provincial government and municipal sewage authority, the first ...


    By DDI Heat Exchangers Inc.

  • Heat Pump Used to Drain Contaminated Sludge in a Steel Factory

    Summary In 1987, new regulations required that factories dispose of their contaminated water and waste themselves. Making galvanised steel wire, the Stelfil factory produces sludge contaminated with lead and zinc. Stelfil spent thousands of dollars to bury this waste and evaluated three systems to remove most of the water: a gas dryer, an induction heated screw conveyor and a heat pump system. ...


  • Second law analysis of condenser by using new heat transfer and pressure drop model based on flow regimes

    A new heat transfer and pressure drop model is used for second law analysis of condenser by considering three mainly occurring two phase flow regimes such as annular, stratified wavy and fully stratified flows. A single pass double pipe two phase heat exchanger is considered for the analysis with refrigerant R134a as two phase fluid. For each type of flow patterns, the behaviour of entropy ...


    By Inderscience Publishers

  • Future-oriented further developments: wastewater heat utilization plants with a return on investment (ROI) of 2 - 6 years

    Sewage is dirty and stinks. Out of sniffing distance – out of mind. Up until the 1980s sewage was taboo and not given the attention it deserves. One cold winter morning in 1988, 23 years ago, Urs Studer stopped beside a steaming manhole cover and wondered how such a source of heat could go untapped. Ever since he has been dedicating himself intensively to the recycling of sewage heat. At ...


    By RABTHERM AG

  • Double Duty Scrubber for TDI Fumes A case-history description of a relatively uncomplicated but effective method for handling large runaway emissions of TDI and solvent vapors.

    NKI (B. V. Nederlandse Kleurstofindustrie, a subsidiary of Morton-Thiokol, Inc. U.S .A.), and one of the major industrial firms in the Netherlands, had a problem with extremely toxic TDI (toluene di-isocyanate) emissions from one of their processes . On a batch basis in different reactors, the largest being 6.5 m cubed(1717 U.S . gallons), a solution polymerization of TDI with polyols in a ...


    By CR Clean Air Group, LLC

  • Optimum thermal coupling system for co-generation nuclear desalination plants

    Owing to the small number of established nuclear desalination plants worldwide, there is a lack of technical data and not enough practical experience in the field of coupling systems. Therefore, in this study different coupling technologies concerning co-generation systems for linking nuclear power reactors to large thermal seawater desalination units (MED and MSF) are reviewed and optimised. ...


    By Inderscience Publishers

  • Evaporator concentrates brine pond for about 1 cent per gallon

    The Facility Eagle-Picher Industries has an 8-acre hazardous waste surface impoundment pond at its Electro-Optics Division plant in Quapaw, Oklahoma. The Problem By the time Eagle-Picher contacted Aqua-Chem ICD, the impoundment pond had been in use for more than 20 years and contained more than 5 million gallons. Environmental regulation required the plant ...

  • Continental Teves – Germany - case study

    Overview Continental Teves is located in Gifhorn near the Volkswagen AG manufcaturing plant. The company is well known for its tire products, and is one of the biggest automotive industry suppliers. The plant in Gifhorn produces ABS control units for the car manufacturing market. Water System Challenges The facility had scale deposits and corrosion that was causing ...

  • Recovering Wasted Energy: Beneath the city streets

    Sewage heat recovery graphNo one likes to think about it, but city planners and engineers often have no choice but to deal with it, and that’s sewage. Though techniques vary somewhat from place to place and from facility to facility, sewage generally flows down pipes with multiple steps in place designed to remove and treat as many solids as possible, before returning the freshly distilled ...


    By DDI Heat Exchangers Inc.

  • It`s Hot in the Y.M.C.A

    The Montclair Y.M.C.A in New Jersey, America has two swimming pools and shower facilities that require constant hot water - presenting a big challenge to the management and maintenance teams. With such a demand on the heat exchangers, limescale build-up has been a perennial problem, not only does it increase fuel usage, but if left unchecked could result in equipment failure. The centre ...


    By Hydropath Technology Ltd.

  • Connections: Toasty Toes

    After 14 years of living on a houseboat we have now moved into an apartment in a private home. There are many wonderful things about this apartment - the lack of dry rot and any concerns about the wind direction are two of them. Perhaps my favorite is the radiant floor heat. Radiant heat, hot water piped under the floors, keeps your toes and the rest of your body toasty. Water is great for this ...


    By BioCycle Magazine

  • Why need to clean water scale case study

    The Importance of Equipment Cleaning Mineral scale occurs wherever circulating water exists, and it forms very fast (generally less than 3 weeks). Even a very thin layer, it will also cause insulation, make equipment inefficient, increase cost, and in some serious cases, it will shut down the whole system and even cause explosion. These problems have already existed in different fields, and ...


    By Mibo International Corp.

  • Magstream-p - case studies

    HDL Magnetic scale preventers enhance quality and cut costs at jaguar Installed HDL unit in phosphate spray pipework in Dec 1988 Before     2x 2000 gals tankers removed sludge every six weeks Now     One tanker every 12 weeks is more than enough Before     Jets blocked Now     jets stay clean ...

  • 1st Tech applications range case study

    Paper industry: roller, air compressor, after cooler, calender bowl, chemical scrubber, closed cooling system, condenser, cooling tower, gas cooler, heat exchanger, intercooler, filtrate tank, filtrate pipe, vacuum filter, vacuum pump, slush pump, lime pump, evaporimeter, digester, scrubber, flow box, squeezer, indirect cooler, absorption plant, gas steam room, steam ...


    By Mibo International Corp.

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