After releasing its new compact BD Nano compressor for mobile refrigeration solutions earlier this year, German-based Secop now has a compressor in the series, model BDN50K, available with the natural refrigerant isobutane (R600a).

The BD Nano compressor, model BDN45F, launched in February 2023 with R1234yf/R134a as refrigerant options. The technical innovations going into the unit include a new motor, lubrication system, miniaturized mufflers, improved valves and compact versatile controllers, Secop said.

According to the product webpage, the R600a unit (BDN50K) outperformed the R123yf/R134a (BDN45F) unit in tests conducted at an ambient temperature of 32.2°C (90°F) with an evaporating temperature of -23.3°C (-9.9°F). The R600a unit provided 68.1W (0.02TR) low-temperature refrigeration capacity with a 1.54 COP, while the R1234yf/R134a unit provided 58.7W (0.017TR) at a 1.52 COP.

Shorter and lighter

“The extreme compact BD Nano (40% shorter, 67% lighter in comparison …) provides the same cooling capacity as much bigger BD35F/50F/35K/50K compressors [weighing up to 4.5kg (9.9lbs)] yet with unrivaled efficiency,” Secop said in a statement. The smaller size gives more cooling cabinet space, and the higher efficiency of the variable speed compressor extends battery life, the company added.

With a weight of 1.5 kg (3.3lbs), the new unit provides mobile refrigeration for recreation vehicles, boats, portable boxes and automobiles, in addition to some medical applications with aftermarket solutions, said Davide Cattana, Vice President of Mobile Cooling Business at Secop, in a video taken at Chillventa 2022.

Powered by a 12–24V DC battery, the units are optimized for E-vehicle use, including solar direct drive. With a COP of up to 2.14, the BD Nano series provides 29 to 69W (0.008 to 0.019TR) low-temperature cooling capacity and 63 to 135W (0.018 to 0.038TR) medium-temperature capacity.

The BD Nano series offers enhanced connectivity and lower electromagnetic interference, Secop said, making it easier to meet equipment standards. In addition, the “robust design” reduces knocking and improves stability during transport.

Headquartered in Flensburg, Germany, the company has more than 65 years’ experience in compressor technology, Secop says on its website. “Secop has more than 40 years of experience in light commercial applications and 20 years in mobile cooling,” said Cattana.

The company has research and development teams in Germany and Austria and production facilities in Slovakia and China.

“The extreme compact BD Nano provides the same cooling capacity as much bigger BD35F/50F/35K/50K compressors yet with unrivaled efficiency.”