<\/span><\/h4>\nHe would be\u00a0GENERAL AWHP EVI\u00a0<\/strong>is equipped with DC inverter compressors or fixed speed compressors with technology\u00a0HOME\u00a0<\/strong>technology\u00a0HOME\u00a0<\/strong>and inverter compressors allow heat pumps to operate efficiently at low ambient temperatures, providing reliable heating, cooling and hot water supply. Diagram and graph showing the principle of the influence of steam injection on the operation of an air-to-water heat pump system.<\/p>\nIn the diagram shown, the liquid in the condenser\u00a08\u00a0<\/strong>(A on the graph) is divided into two parts:<\/p>\n\n- Minor part of the liquid (i)\u00a0<\/strong>:\n
\n- Passes through the additional expansion valve\u00a04\u00a0<\/strong>.<\/li>\n
- with 6\u00a0<\/strong>plates (economizer) (HX), which operate on the countercurrent principle (superheating\u00a0B\u00a0<\/strong>on the economizer).<\/li>\n<\/ul>\n<\/li>\n
- Main fluid flow (m)\u00a0<\/strong>:\n
\n- This is cooled in the economizer\u00a06\u00a0<\/strong>(point\u00a0A\u00a0<\/strong>on the graph) due to evaporation and overheating of the mass flow injected into the economizer.<\/li>\n
- saver\u00a06\u00a0<\/strong>works as a subcooler for the main mass flow (\u00a0m\u00b2\u00a0<\/strong>) and as an evaporator for the injected mass.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n
Superheated steam\u00a0<\/strong>is then injected into the intermediate steam injection port\u00a0HOME\u00a0<\/strong>of the scroll compressor.<\/p>\n<\/span>Efficiency of EVI technology<\/strong><\/span><\/span><\/h4>\n\n- Additional cooling\u00a0<\/strong>:\n
\n- Increases evaporator performance\u00a03\u00a0<\/strong>by reducing the temperature of the liquid from TLI to TLO, which reduces its enthalpy.<\/li>\n
- The heating capacity increases due to the additional condensate mass flow EVI (i).<\/li>\n<\/ul>\n<\/li>\n
- Improved cycle efficiency\u00a0<\/strong>:\n
\n- The vapor injection compressor cycle is more efficient than a traditional single-stage compressor delivering the same power.<\/li>\n
- Additional power is achieved with lower energy consumption because the injected mass is compressed from an intermediate pressure rather than from a low intake pressure.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
Advantages of EVI heat pumps<\/strong><\/p>\n\n- \n
\u2705 Stable operation in regions with severe winters;<\/p>\n<\/li>\n
- \n
\u2705 Constant efficiency without major COP losses;<\/p>\n<\/li>\n
- \n
\u2705 Automatic activation depending on temperature (e.g. +7\u00b0C for many models);<\/p>\n<\/li>\n
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\u2705 Possibility of use with environmentally friendly refrigerants such as R290 or R1234ze.<\/p>\n<\/li>\n<\/ul>\n
The additional subcooling effect in the EVI configuration allows the heat pump to extract heat from the outside air at lower temperatures. Only this technology can ensure uninterrupted operation of the heating system during the cold period.<\/p>\n
\n- Operating temperature range:<\/strong>\n
\n- Heat pumps with DC inverter compressor or fixed speed compressor without EVI operate in the range from -10\u00b0C .. 20\u00b0C to +45\u00b0C (outdoor air temperature).<\/li>\n
- Heat pumps with DC inverter compressor or fixed speed compressor and EVI technology operate in an extended range: from -25\u00b0C to +45\u00b0C for refrigerants R32, R410 and from -30\u00b0C to +45\u00b0C for R290, R513, R1234ze.<\/li>\n
- The steam injection function is activated programmatically at outdoor temperatures of +7\u00b0C or lower.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
Thus, technology\u00a0HOME\u00a0<\/strong>makes heat pumps more efficient in harsh climates, providing stable heating at low ambient temperatures.<\/p>\n
\n<\/span>What influences the efficiency of a heat pump?<\/span><\/span><\/h2>\n\n- \n
\ud83c\udf21\ufe0f Climate zone<\/strong>: Moldova, Romania or Ukraine have different needs than the south of France or Greece.<\/p>\n<\/li>\n- \n
\ud83e\uddf1 Thermal insulation<\/strong> of the home: poorly insulated homes consume more, regardless of technology.<\/p>\n<\/li>\n- \n
\u2699\ufe0f Correct sizing<\/strong>: an undersized pump will constantly operate at full capacity.<\/p>\n<\/li>\n- \n
\ud83d\udccd Location of units<\/strong>: shadow, wind direction, noise level, etc.<\/p>\n<\/li>\n