Seeking help in selecting condensers and evaporators
Thread Content
Hello everyone: I haven’t been on the forum for a long time, and I’m a bit embarrassed to post questions here for help now. It’s like this: the customer needs a device for condensation dehumidification. The process follows this cycle: drying oven – evaporator (which cools the air to remove moisture) – condenser (which raises the air temperature back to its original level) – drying oven. Currently, the customer is using a 10-horsepower compressor. I need to help him fit the condenser and evaporator. I’ve looked up a lot of information online, and it says that the heat exchange area of the condenser should be designed to be larger than that of the evaporator, as the compressor also has its own power requirements. For example, if I design the evaporator with 8 rows, then the condenser should have 10 rows, with a coefficient of around 1.2. I’d like to ask if this is indeed the case? Additionally, is it feasible to make the wind-facing areas of the evaporator and condenser the same size, with a wind speed of 2.5 m/s? I also would like to ask the more experienced colleagues: for a compressor with a power rating of 10 horsepower, is it true that, according to the guidelines found online, an evaporator with a heat exchange area of around 6 square feet and a condenser with a heat exchange area of 8 square feet are appropriate? Not very grateful!
Under normal circumstances, it is not recommended to use more than 4 rows for evaporators and condensers. If there are more than 4 rows, the wind resistance becomes too high, which hinders axial flow ventilation; moreover, condensate water generated during the evaporation process accumulates on the evaporator, making drainage difficult. Therefore, it is recommended to have no more than 4 rows. The condenser should operate according to the indoor setting conditions. Drying ovens of the heat-pump type can be divided into two categories: one for high-temperature conditions (above 65 degrees) and another for normal operating conditions (below 65 degrees). Units operating in high-temperature conditions must use a two-stage condensation technique to ensure that the liquid supply temperature remains below 45 degrees, while units operating under normal conditions can rely on single-stage condensation. Detailed calculations are required for matching in the evaporator. You can come to our Boyi Air Conditioning for a detailed explanation.