In many occasions the result of a heat transfer calculation is the need for combining several heat exchanger modules into a single heat exchanger. Our heat exchangers are standardized to maximum inner tube length of 6 meters. If a thermal length of more than 6 meters is needed, multiple modules will have to be mounted in series, interconnecting both tube side and service side fluid connections. This way a fully countercurrent flow heat exchanger can be made, built up from several individual modules. All modules are placed into a support frame. HRS Heat Exchangers has designed and commissioned successfully very large and complex heat exchanger skids, tailor made to the customers wishes.

A good example of mounting multiple units in a frame is a pasteurization skid. In pasteurization processes food products have to be heated up to the desired pasteurization temperature and then cooled back to the filling temperature. In many occasions heat recovery takes place by transferring heat from the pasteurized fluid (hot fluid) to the incoming unpasteurized (cold) fluid. Energy savings can be obtained by direct heat recovery (product to product heat transfer) or indirect heat recovery (using an intermediate water loop between the hot and cold fluids. Either way, the pasteurization skid often contains 4 or more separate heat exchanger sections. All these sections can be combined into one common heat exchanger skid.

HRS Heat Exchanger has taken skid mounting to an extreme in the development of the MX series heat exchangers for pasteurization applications. In some occasions pasteurization skids may contain up to 40 individual modules. With traditional design, such large heat exchanger skids may occupy very large volumes and can take up a lot of floor space. Thanks to its patented compact design, HRS Heat Exchangers has reduced the interconnecting distance between modules to a minimum. The result is one of the most compact heat exchanger systems available in the market today.