More Views

460 000 BTU Heat Exchanger for Salt Water

Excl. VAT: £888.13 Incl. VAT: £1,065.76

Quick Overview

Key Benefits

  • 460K BTU
  • Stainless Steel
  • for Salt Water



    Swimming pools that utilise Salt for water purification cannot be connected directly to solar panels - this is because Salt can attack copper. The solution is to fit a stainless steel heat exchanger. These are available in various sizes up to 460 000 btu. For solar use, heat exchangers should be rated at least one size larger than for a conventional heat source. Pipe fittings are 1 bsp on solarboiler input and output and 1.5 bsp on pool connections. Both connections are male fittings.
    Navitron Pool Heat Exchangers have 1 BSP connectors for boiler and 1½ BSP for pool connections as well as a sensor pocket at the top. They should be fitted downstream of the pool pumpfilter unit.

    The procedure adopted for rating pool heat exchangers requires high flow high temperature input. This is unrealistic of solar installations, which would not run efficiently under these conditions. Therefore it is customary to over-size pool heat exchangers when used with solar. Assuming you maintain the flow rates quoted in the table below, you can assume that the 170 000 BTU heat exchanger (50kW) will be suitable for up to 6 x 20tube 47mm Navitron solar panels. However, if flow rates are reduced, then output should be derated accordingly.

    Rated Output: BTU 460,000
    KW: 134.7
    Filter Secondary Flow: gpm 103 M3hr 39
    Boiler Primary Flow: gpm 38 m3hr 10
    Primary Water Design Flow Temperature: degC 82
    Primary Water Design Return Temperature: degC 71
    Primary Head Loss: ft 5 mb 150

    Width: mm 220
    Length: mm 775
    Depth: mm 140
    P Primary Connections BSP Male Thread: In 1?
    S Secondary Connections BSP Male Thread: Ins 1.5?
    Weight: Kg 17.5

    If you wish to explore this further, the following equations may be of help in calculating the heat exchanger performance:
    The rate of heat transfer Q = U x A x dTmean = kW
    U (kWm2 K) = 1Rt  and Rt  = total thermal resistance (m2 KkW)
    A = surface area (m2)
    dTmean = True mean temperature difference (K)

    The temperature of both the primary (Th) and the secondary (Tc) fluids will generally vary as they pass through the heat exchanger and you need to know the true mean dT which is not the same as the dT between the boilersolar flow and the pool water.  The heat transfer will also vary depending on whether it is a parallel or counter-flow heat exchanger and you may need to calculate the log mean temperature difference (LMTD) depending on the resulting dTmax and dTmin.

    For a parallel flow heat exchanger dTmax= Th1-Tc1 and dTmin= Th2-Tc2

    For a counter flow heat exchanger dTmax= Th1-Tc2 and dTmin= Th2-Tc1

    Th1 Th2 = Primary (boilersolar side) inletoutlet temp.
    Tc1 and Tc2 = Secondary (pool side) inletoutlet temp.

    LMTD dTmean= (dTmax - dTmin) In(dTmax dTmin)

    If dTmax=dTmin, then LMTD dTmean = O, so therefore the arithmetic mean temperature difference is used
    (many thanks to Lightfoot for providing these)

    Write Your Own Review

    You're reviewing: 460 000 BTU Heat Exchanger for Salt Water

    How do you rate this product? *

      1 star 2 stars 3 stars 4 stars 5 stars
    • There are currently no downloads for this product.
    The team here at Navitron pride ourselves on ensuring that our products arrive fast and in excellent condition to our customers, which is why our delivery charges will depend on the type of product you have ordered.

    At Navitron we go that extra mile in taking special care when packaging our large and fragile products. We also select specialist carriers who are frequently shipping fragile and complex products. Our delivery prices reflect this attention to detail and carrier expertise.

    A lot of our larger items have to be shipped by pallet or on dedicated vehicles to ensure their arrival undamaged. This is reflected in some of our shipping prices for larger items and in most cases you should be able to choose the method that best suits you. Collection is available for everything if you'd prefer to arrange your own transportation, just give the office a call once you've ordered to arrange. We are open 8am – 4.30pm Monday – Friday.

    Regardless of the type of products you want to purchase, we always make sure to group them into as few deliveries as possible, to offer you the lowest shipping prices possible.

    If you have any questions regarding our delivery prices please don't hesitate to contact the Navitron on or call our friendly customer service team who will be only too happy to help on 01572 725512.

    Please wait...

    © Copyright 1999-2012 Company Registration Number 5041660 VAT Registered GB 826 4013 51
    ECommerce development by Williams Commerce