In favor of which air conditioning system should you choose when it comes to equipping facilities with limited power capacity? Experts recommend paying attention to VRF systems with a gas-driven heat pump (GHP). Panasonic offers a unique solution in the market with the ECO G series gas-driven heat pump VRF systems. They currently have some of the highest reliability in the industry and guarantee the same effective control and performance as an inverter controlled electric air conditioner. Increased performance at partial load, reduced gas consumption, economical energy consumption, environmental friendliness — these are the advantages of this series as a whole.
The main VRF system of the Eco G series is a gas-driven heat pump. It provides fast and powerful cooling and heating and increases the heat input to the room by efficiently recovering heat from the water from the engine cooling system, which is transferred to the coolant circuit through a highly efficient plate heat exchanger.
The engine of a gas-driven heat pump (combustion engine) changes its speed to match the functional loads of the building, which is comparable to an inverter-type electric air conditioner. If there are power outages, a gas-fired heat pump can be the best solution, as
runs on natural or liquefied gas and from a single-phase power supply;
allows you to use the power supply of the building for other critical needs;
reduces capital costs for the renewal of electrical substations for the maintenance of heating and cooling systems;
reduces power loads within the building, especially during peak periods;
the power supply is freed up for other purposes such as servers, expensive commercial equipment, manufacturing, lighting, etc.
Energy efficiency is achieved, firstly, because all models are equipped with high-capacity air exchangers and a newly developed refrigerant heat exchanger for economical operation. The conditions for efficient operation are created by the load sharing function, which can concentrate the cooling/heating power on one outdoor unit while turning off the others. Compared to conventional units with the same COP, this feature saves energy and thus reduces operating costs, especially during part load seasons such as spring and autumn.
Finally, thanks to an advanced heat exchanger design, a gas-driven heat pump system offers improved performance and reduced operating costs, which, combined with improved engine management systems, significantly increases the conversion rate (COP) of the system.
Cold and hot water
A chiller option is available in the system, which can be combined with individual outdoor units or with a complex of direct expansion indoor units. The system can be controlled through a general building automation and dispatching system or using the Panasonic control panel supplied in the kit, with heat carrier temperature settings from -15 C to +15 C, and hot water from +35 C to +55 C.
In addition, the system has a hot water function. The heat from the exhaust gases, which are normally vented to the atmosphere, is recovered through a heat exchanger and is efficiently used to heat water, so the gas heat pump chiller acts as a built-in subsystem that lightens the load on the client’s main hot water system, thus supplying «free» hot water .
A gas heat pump air conditioner does not need a defrost cycle. This provides continuous 100% heating power in harsh weather conditions when the outside air temperature reaches -20C. When operating in cooling mode, the heat emitted by the engine is available for use in the hot water system and is capable of generating up to 30 kW of power to heat water up to 75C. The hot water supply system is also available for use during heating when the outdoor temperature exceeds 7C.
Convenient installation and operation
Thanks to the use of the main pipeline, the cost and installation time are significantly reduced. By combining all the pipes required for each indoor unit into a common pipe in each system, the number of pipes is halved, resulting in a simple design. In addition, the internal section of the pipes inside the pipelines can be reduced by 2/3. Combining all pipes required for each outdoor unit into a common pipe in each system reduces the number of pipes by half.
The service life of VRF systems is increased due to the rotation function. It is started by outdoor units with short run time, adjusting the run time of each outdoor unit so that it does not exceed the average run time of the outdoor unit. This increases the periods between maintenance or replacement.
The system does not stop even during maintenance thanks to the manual backup function. Maintenance can also be carried out on weekdays. If one outdoor unit stops, the redundancy function will automatically start the remaining unit and keep running. During service work, the serviced system can be isolated by means of a shut-off valve in the outdoor unit, which allows not to interrupt the work, the outdoor unit will continue to function.
When it becomes necessary to replace some older chillers at the end of their life, gas-driven heat pumps with water heat exchangers provide the option to carry out this operation in stages while using existing water piping and fan coil units. This makes it possible to complete the project on time, within a limited budget, and avoid problems associated with refrigerant and confined spaces.
Model range of outdoor units ECO G
VRF systems equipped with a gas-driven heat pump have the lowest nitrogen oxide emissions. Thanks to groundbreaking developments, Panasonic gas heat pumps feature a brand new lean burn combustion system that uses feedback control of the air/fuel ratio to reduce NOx emissions to an unprecedented low level. During heating operation at an ambient temperature below 4°C, the external fans are switched off, further reducing operating costs and CO2 emissions.
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