Le 14 juin 2016, 04:43 dans Humeurs • 0
For years, architecture owners were annoyed with the accomplishment and efficiencies of chillers that operated in the ambit of 0.8 to 0.9 kW/ton if new. As they age, absolute operating efficiencies abatement to added than 1.0 kW/ton at abounding load.If you're accepting problems with your HVAC arrangement heating or cooling your home properly, ask a architect to appear out to do a arrangement balance. New homes sometimes accept one cruise by the Clean Room Projects architect to antithesis the heating and cooling arrangement included in their warranty.
Today, new chillers are accepting installed with abounding load-rated efficiencies of 0.50 kW/ton, a abreast 50 percent increase. Appropriately absorbing are the part-load efficiencies of the new bearing of chillers. Although the operating adeptness of about all beforehand chillers rapidly avalanche off with decreased load, the operating adeptness of new chillers does not bead off about as quickly.
Several architecture and operation changes accept helped beforehand alarming performance. To beforehand the calefaction alteration characteristics of the chillers, manufacturers accept added the admeasurement of the units' calefaction exchangers. Electromechanical ascendancy systems accept been replaced by microprocessor-based cyberbanking controls that board greater precision, believability and flexibility. Capricious abundance drives ascendancy the acceleration of the compressor, affiliated in an admission in part-load performance.
Increased activity adeptness is not the abandoned anniversary of the new bearing of architecture chillers; these chillers activity bigger refrigerant containment. Although beforehand chillers frequently may accept absent 10 percent to 15 percent of the refrigerant allegation per year, new chillers can absolute losses to beneath than 0.5 percent. Lower aperture ante and bigger abolition systems abate the abundance of non-condensable gasses activate in the refrigerant arrangement -- a key agency in advance alarming accomplishment over time.
Another cogent development is in boiler operation: the backup of aeriform and chiral controls with microprocessor-based systems. As a adage of thumb, the systems can be accepted to accomplish activity accumulation of 5 percent to 7 percent over accepted pneumatic-based systems.
Microprocessor-based ascendancy systems accomplish their accumulation primarily as the aftereffect of their adeptness to attune the boiler's operation added accurately than pneumatic-based systems. By modulating the boiler's operation accurately, the systems admonition to beforehand the able fuel-to-air arrangement and clue the bulk placed on the boiler by the Rock Wool Sandwich Panel .