Evaluation of one-year operation of hybrid heat source for heating the building and preparation of hot water / Dawid Taler, Rafał Pitry, Jan Taler // W: Heat pipes, heat pumps, refrigerators, power sources ... więcej

Evaluation of one-year operation of hybrid heat source for heating the building and preparation of hot water / Dawid Taler, Rafał Pitry, Jan Taler // W: Heat pipes, heat pumps, refrigerators, power sources : proceedings of the X Minsk International Seminar, held in Minsk, Belarus, 10-13 September 2018 / National Academy of Sciences of Belarus [et al.]. – Minsk : [s.n.], 2018. – S. 236-245 : rys., tab., wykr. – Bibliogr. 19 poz., Abstr. – Ref. zamieszczony również na USB dołączonym do książki

The paper presents the results of research on the operation and energy efficiency of a 186 kW gas-fired condensing boiler operating in a hybrid heat source system. The boiler co-operates with an 81.1 kW ... więcej

The paper presents the results of research on the operation and energy efficiency of a 186 kW gas-fired condensing boiler operating in a hybrid heat source system. The boiler co-operates with an 81.1 kW (electric) brine-to-water compressor heat pump, a 27.4 kW air-to-water heat pump and 6 flat solar collectors. A local, built-in, hybrid heat source is located in a public building and is intended to satisfy the building needs. The study was conducted over a period of 1 year – from 1 September 2014 to 31 August 2015. The gas-fired boiler operates in the heating buffer system all year round. The boiler performance is characterized both in the winter and in the summer season, in terms of the amount of heat produced and the heating power. The calculations results of the heat generation efficiency obtained in the measuring period are also presented and compared to the data given in regulations applicable to performing energy audits and issuing energy certificates. One of the conclusions from the research carried out is that the amount of heat generated throughout a year is not proportional to the installed power of an energy-generating device, which is first and foremost related to the device working time. For example, the results of annual measurements indicate that for the 186 kW gas-fired boiler, its percentage share of the heat generation during the whole year is 51.11%, whereas for the 81.1 kW brine-to-water heat pump, the percentage share of the overall annual thermal energy production is as much as 43.02%.