Chiller with an integrated heat recovery system for a pharmaceutical company in Thailand


Vesco Pharmaceutical Co., Ltd. is a GMP certified pharmaceuticals manufacturing company established in 1967 and headquartered in Chatuchak, Bangkok, Thailand. The company produces and markets a wide range of high-quality products in different dosage forms in several therapeutic ranges including Alimentary System, Antipyretic, Neuro-Muscular System, Hormones, Antibiotics, Vitamins and Dermatological. Alongside the domestic market, Vesco also exports high quality medicine to various countries in South East Asia.


Hecoclima’s team was tasked with supplying a new chiller to replace the existing unit, with the special requirement of a heat recovery heat exchanger integrated in the chiller unit. The existing system included a standard chiller, modified by the customer to include a heat recovery heat exchanger. However, the system was not very reliable, quite difficult to control and with limited efficiency. Hecoclima’s team, together with our local partner were able to evaluate the existing system and propose and alternative solution, offering a new unit with a heat recovery system already integrated in the design.


Hecoclima installed an air-cooled unit of 191 kW (54 RT) and partial heat recovery of 30 kW, supplying chilled water at 9 °C and hot water at 55 °C. Hecoclima’s scope of work included designing the unit in accordance with existing space limitations, since the unit was a replacement, and the installation of the unit at the customer’s premises.


The unit satisfies the load required for a stand-alone clean room at the customer’s manufacturing headquarters, providing the required hot and chilled water supply. Additionally, since the unit is equipped with two tandem scroll compressors on two separate refrigerant circuits, the unit is able to efficiently operate at low cooling load as well.

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