Total Heat Recovery Of Gas Boiler By Absorption Heat

Therefore, the latent heat, the majority of the waste heat in the flue gas, which is contained in the water vapor, cannot be recovered. This paper presents a new approach to improve boiler thermal efficiency by integrating absorption heat pumps with natural gas boilers for waste heat recovery (HRAHP).

This paper presents an open absorption system for total heat recovery from fossil fuel boilers using the high temperature flue gas as the regeneration heat source. In this system, liquid desiccant serves as the recycling medium, which absorbs waste heat and moisture contained in the low temperature flue gas in the packed tower and then regenerates in the regenerator by the high temperature flue gas.

The authors known of no experimental studies using the open-cycle absorption heat pump for heat recovery from the flue gas of natural gas boilers. Westerlund tested a heat recovery system integrating an OAHP system with a bio-boiler using biomass that mainly consisted of wet wood chips, which is quite different from natural gas. Furthermore, the flue gas parameters, including its …

Heat recovery steam generators. A heat recovery steam generator (HRSG) is a steam boiler that uses hot exhaust gases from the gas turbines or reciprocating engines in a CHP plant to heat up water and generate steam. The steam, in turn, drives a steam turbine or is used in industrial processes that require heat.

Jan 01, 2017· In the case of natural gas boilers, the heat recovery efficiency of the open absorption system is about 59% higher than the traditional condensing system and about 14% higher than the electrical or closed absorption heat pump system. The states of flue gases at the outlets of different kind of heat recovery systems are shown in Figure 5.

Moreover, the total heat recovery of the system increases from 275 kW to 413 kW with the flue gas temperature increasing from 300 °C to 600 °C as shown in Fig. 3 (b). At constant water flow rate, the supply water temperature (TW6) increases from 53.1 °C to 59.6 °C. Download : …

Cited by: 10 Total heat recovery of gas boiler by absorption heat pump and direct-contact heat exchanger. This paper presents a new technology which combines the absorption heat pump and …

(2019). Application of absorption heat pump and direct-contact total heat exchanger to advanced-recovery flue-gas waste heat for gas boiler. Science and Technology for the Built Environment: Vol. 25, No. 2, pp. 149-155.

18 GE range high efficiency cast iron boilers (455-1,200kW) 20 Combined heat and power (CHP) modules 22 Uni 3000 F hot water boilers (420-1,850kW) 24 UNIMAT hot water boilers (650-38,000kW) 26 UNIVERSAL steam boilers (175-55,000kg/hr) 28 Heat recovery steam boiler (HRSB) 30 GHP AWO 38 Gas absorption heat pump 32 Solar flat plate collectors 34

An absorption-heat-pump-plus-boiler system with equal proportions of heat-pump and boiler capacity can achieve essentially the same seasonal efficiency as a heat-pump-only system. Depending on building-owner preferences, the heating capacity of the absorption-heat-pump portion of a hybrid system usually will be within 25 to 50 percent of total

To improve the efficiency of the gas-fired boiler in a more cost effective and higher efficient way, a non-contact total heat recovery (NCHR) system is proposed for recovering heat from flue gas