Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Hybrid heat pumps to meet heating and cooling demand in breweries and other process industries
Submission Author:
Rogério Gomes de Oliveira , SC
Co-Authors:
Rogério Gomes de Oliveira
Presenter: Rogério Gomes de Oliveira
doi://10.26678/ABCM.COBEM2021.COB2021-1537
Abstract
The feasibility of heat pumps to meet different heating and cooling demand ratios at industries was analyzed through numerical simulation. Heat should be provided above 100 °C, whereas cooling should occur below 0 °C. Eight arrangements were compared and they had the following configurations: (i) and (ii) mechanical compression chiller with electric heater (i) or boiler (ii); (iii) and (iv) absorption chiller and boiler but in arrangement (iv) absorption chiller was also employed as heat pump to meet the heating demand; (v) to (viii) hybrid mechanical compression-absorption machine. Arrangements (v) to (vii) also had a boiler to meet heating demand, whereas arrangement (viii) had an electric heater for such purpose. Arrangements (v) and (vi) had respectively, compressor at low and at high pressures, whereas arrangements (vii) and (viii) had a mechanical compression chiller in cascade with the hybrid machine. Thermal and electrical energy consumption and costs were compared considering boilers fueled either by wood chips or by natural gas. The most efficient arrangement employed an hybrid machine and a boiler. The arrangement with smallest energy cost depended on the fuel employed as main source of thermal energy.
Keywords
Absorption heat pump, Hybrid heat pump, Advanced absorption cycle, Brewery, Ammonia
