Substance of development
Contact water heating units for decentralized heating systems of residential and industrial buildings of three sizes with net power 0.5 ; 1.0 and 2.5 MW are developed. A new approach for the furnace process organization and application of high-performance contact feeling in the convective part of the unit are used in developed construction. Mentioned allowed to create water heater with combustion products condensation and as result – with higher efficiency compared with traditional surface units.
Water heaters are characterized by compactness, low metal content (2 kg/kW), high efficiency – efficiency is 106 % based on the net calorific value, the full scope of automation. Units provides heating water to 95 °C with natural gas low (< 5 kPa) and medium (10 – 30 kPa) pressure. Mass units, respectively 600, 2200 and 3700 kg, price $ 8000, 12000 and 20000 with a payback period of 6 months.