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1 Rynek Energii

1 2010

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Combined heat and power unit based on polymeric electrolyte membrane fuel cell in a hotel application

Milewski J., Badyda K., Misztal Z., Wołowicz M.

Rynek Energii

2010

nr 5

118-123

The paper presents a 30 kW micro Combined Heat and Power (ž-CHP) system which is able to provide heat and power for a more efficient energy use in a hotel. The main objective of ž-CHP unit is to introduce the novel concept of a Polymeric Electrolyte Membrane Fuel Cell based CHP (ž-CHP-PEMFC) system able to satisfy both the thermal (heating and sanitary water), cooling and electrical power need of the whole building replacing the small methane boiler installed in the single flats as well as old-fashioned centralised oil thermal plant. To address current limitations in hydrogen supply the system is equipped with a compact steam reforming unit able to produce a hydrogen rich mixture suitable for feeding PEMFC starting from methane, methanol or bio-gas without any modification thanks to several innovative concepts based to very reliable and efficient catalysts as well as related design and manufacturing process. Adequate control unit quantify the amount of energy flowing in (electrical/thermal energy consumption) and flowing out (excess of electrical power sold out) from the ž-CHP-PEMFC. The 30kWel proposed size is the results of a market study which based on the assumption that the average power need for an apartment is about 1kW and therefore the proposed size is suitable to provide electrical power to the hotel with at least 20--25 apartments; moreover the required emergency power of the hotel can be covered by the proposed unit during any black down of the external electric network. As far as the heating need is concerned, the CHP system provides about 50kWth of additional heat and a small condensation boiler fills up the exceeding thermal need when required. The functioning principle of the CHP system with fuel cells is described.

Przedstawiono 30 kW układ mikro kogeneracji (?-CHP), który jest w stanie pokryć część zapotrzebowania na ciepło i energię elektryczną hotelu. Aby rozwiązać obecne problemy z brakiem dostępu do wodoru, układ wyposażony jest w kompaktowy system parowego reformingu gazu ziemnego. Układ będzie zapewniał energię elektryczną dla maksymalnie 20--25 pokoi hotelowych (na 90 obecnych). Ponadto będzie spełniał funkcje zasilania awaryjnego podczas braku zasilania z sieci elektroenergetycznej. W miarę potrzeby układ może dostarczać ok 50kWth na potrzeby grzewcze.