Best practice examples

In 2010, Thermofin started the design process of an integral system capable of producing the necessary refrigerating demand for chilling units and cold storage rooms as well as provide air condition in the sales areas and supply underfloor heating of supermarkets. The X-TCDH technology uses the natural refrigerant propane (R290). The system uses a 130kW refrigeration system in combination with a 40kW heat pump. Cooling is indirect through the secondary refrigerant propylene glycol; if very low temperatures are required, an extra cooling unit can be added to the system as a CO2 cascade. In addition to providing cooling and heating using an environmentally-friendly refrigerant, the compact system also achieves high efficiencies and investment savings. …

The KRONOS series from Secon is specially designed for water-cooled applications and also uses the natural and highly efficient refrigerant propane (R290). All units have their own enclosure with gas monitoring and ATEX hazardous area ventilation and can be installed in suitable machinery rooms. Alternatively, the units are also available with a weatherproof housing for outdoor installation. The series covers cooling capacities from 60 to 700 kW and can be used in a wide temperature range with outlet temperatures from +20 to -35°C. LT models use propylene (R1270), which is also a natural refrigerant. The units can be equipped with 1 to 4 reciprocating compressors. The capacity control is either stepped or stepless with inverters. The units already have a special, highly developed control system as standard. Optionally, they can also be equipped with a Siemens S7 industrial control system. …

Ubiblue's Compact Magnetic Refrigeration System (MRS) is a stand-alone unit with a refrigeration power of 400W and a temperature span of 25°C, making it the ideal solution for a range of small-scale applications. The use of permanent magnets may reduce energy costs by up to 50%. Magnetic cooling is becoming an ever-increasing solution used for the cold industry. In a MRS, a controlled magnetic field applies a series of magnetization-demagnetization cycles to the magnetocaloric alloys. Each cycle produces a temperature gradient in the material, and a rapid succession of these cycles produces the final and stabilized hot and cold temperatures in the refrigeration system. Moreover, the MRS uses glycol as a coolant, such that is not environmentally harmful. This technology resolves the two main concerns regarding compressor-bases refrigeration systems: the environmental issue via a gas-free solution as well as the economic issue by using permanent magnets that dramatically reduce energy consumption. …

Hychill’s Minus 10 is a high-purity, isobutane (R600a) refrigerant used in state-of-the art commercial and domestic refrigeration. It provides all benefits associated with hydrocarbon refrigerants while simultaneously avoiding environmental damage and global warming. Minus 10 was developed primarily for use in purpose built systems designed for R600a, including light commercial systems, wine coolers and drink display cabinets. Reduced operating pressure and excellent heat absorption capacity provide users with up to 30% energy consumption reduction. Its superior thermodynamic properties make it an ideal refrigerant for use in 6-star Energy Efficiency rating systems. …

Hychill’s Minus 30 is a mixture of isobutane (R600a) and propane (R290), two hydrocarbon refrigerant gases, and is designed for use in automotive air conditioning systems and medium temperature refrigeration units. Minus 30 provides all benefits associated with hydrocarbon refrigerants while simultaneously avoiding environmental damage and global warming. Minus 30 is ideal for use in small commercial refrigeration and air-conditioning systems where R12 has traditionally been used. It provides superior efficiency, lower cooling temperatures, extended ambient temperature operating range and reliable performance. The reduced operating pressure and excellent heat absorption capacity provide consumers with a reduction in fuel consumption of up to 20%. Hydrocarbon refrigerants are flammable, and therefore require accredited technicians to install and maintain them. HyChill hydrocarbon refrigerants carry a distinctive “rotting cabbage” odour so that any leak is immediately noticed and rectified. …

Hychills’ Minus 40 hydrocarbon refrigerant is a high-purity, propane (R290) refrigerant used in medium to low temperature refrigeration systems such as supermarkets and shops. Minus 40 provides all benefits associated with hydrocarbon refrigerants while simultaneously avoiding environmental damage and global warming. Minus 40 is commonly used in small-scale cooling appliances such as food display cabinets and ice cream and drink dispensing machines. It is also ideal for use in split system air conditioners. Reduced operating pressure and excellent heat absorption capacity provide users with up to 30% reduction in energy consumption. Its superior thermodynamic properties make it an ideal refrigerant for use in 6-star Energy Efficiency rating systems. Hydrocarbon refrigerants are flammable, and therefore require accredited technicians to install and maintain them. HyChill hydrocarbon refrigerants carry a distinctive “rotting cabbage” odour so that any leak is immediately noticed and rectified. …

Secop’s variable speed NLV-CN propane compressor solution provides cooling efficiency in a single unit, tailor-made features, and easy integration while ensuring considerable energy savings. The NLV-CN Compressor for R290 is characterised by high efficiency and a green solution using the environmentally friendly refrigerant propane (R290) with a low global warming potential (GWP 3). Additionally the variable-speed design can obtain energy savings of up to 40% when compared to fixed-speed compressors in on/off operation mode. The new 105N4760 °CCD® controller with its wide operating voltage range can be used for all voltages and frequencies globally. …

Bitzer’s open-drive screw compressor series OSKA is ideal for use in large-scale commercial and industrial ammonia refrigeration and air conditioning systems. With a high cooling capacity, the OSKA series may be used on its own or in parallel operation with several compressors and shared oil separator in industrial applications. The combination of open compressor and external standard motors make the series exceptionally flexible and allows operation at different supply voltages. A significant improvement to the new series is the separation between the refrigerant circuit and electrical drive, greatly facilitating maintenance and repair. Further improvements include large volume flows of up to 1,015 m3/h at 2,900 revolutions per minute, integrated control electronics and an optimized slider concept for seamlessly adjustable capacity control. …

The pRack platform designed by CAREL offers comprehensive control and management of centralized compressor racks. Combining flexibility and configurability with energy saving and system total control, the pRack is the ideal solution to respond to a variety of market requirements. The single device satisfies the needs of different size compressor racks. It is highly flexible and can adapt its operation to the type of systems and specifications of the electric panel. Moreover, pRack optimizes compressor rack operation by applying available modulation devices, as well as control and rotation algorithms to stabilize operation pressure. …

Bitzer’s OCTAGON SL series of semi hermetic reciprocating compressors have cooling capacities ranging from 2.7 and 80 kW (–35° C/–5° C) for different subcritical applications. Bitzer’s CO2 compressors have been boasting with an efficient suction gas-cooled motor, high-quality valve plates, wear-resistant drive gears as well as adjustable capacity control since 1988. The OCTAGON SL compressor series offers improved energy efficiency, and the application limits were pushed to a higher condensing temperature whilst the admissible pressure load was expanded on the high and low-pressure side (53/30 bar). …