Obiettivo In any geothermal energy system linked to District Heating, the need exists to obtain maximum heat recovery from the geothermal source. Electrically driven vapour compression heat pumps are sometimes used for this application. The high cost of electrical energy however reduces the economic benefits of vapour compression heat pump systems and the aim of the project is to demonstrate the use of an absorbtion heat pump to provide a more cost effective method of increasing the energy supply from geothermal energy system.The heat pump is operating to its full duty and has increased the heat supply capacity from the geothermal source from 1094 to 2138 kW.The Southampton Geothermal District Heating Scheme has been operating since March 1988. The Geothermal Well produces 12 litres per second of hot water at 72 deg. C. This heat is currently supplemented by hot water produced from a 250 kW(e) 450 kW(t) Combined Heat and Power generator and by hot water produced from boilers.The absorbtion heat pump has been installed to meet any expanding heat load to double the effective heat supply from the geothermal Source during winter periods.The heat available from a CHP generator or hot water boiler plant is used to drive the absorbtion heat pump thereby achieving the enhanced heat recovery from the Geothermal brine with minimal operating expense.The district heating return water has a seasonal variation in the range 40-50 deg. C. Part of the return water (12 litres per second) is pumped into the evaporator where it is cooled to 28 deg. C before passing to the geothermal exchanger for heating to 70 deg. C. A further part of the return water (32 litres per second) is pumped to the absorber and then on to the condenser where it is heated to 70 deg. C (the cooling water circuit).Heat for reconcentration of the lithium bromide solution is supplied either from a CHP generator exhaust gas heat recovery exchanger or from the hot water boiler at 135 deg. C. The duty of the absorbtion unit is controlled by the hot water supply flow rate to the generator, Programma(i) ENG-ENDEMO C - Programme (EEC) of demonstration projects and industrial pilot projects (EEC) in the energy field, 1985-1989 Argomento(i) 4.1 - HEATING Invito a presentare proposte Data not available Meccanismo di finanziamento DEM - Demonstration contracts Coordinatore Utilicom Ltd Contributo UE Nessun dato Indirizzo Pelham House Broadfield Barton RH11 9BY Crawley Regno Unito Mostra sulla mappa Costo totale Nessun dato
