crea 2008il futuro e’ verticale ici caldaie celle a combustibile per la micro generazione alberto...

CREA 2008 IL FUTURO E’ VERTICALE ICI Caldaie

Celle a combustibile per la micro generazione

Alberto Zerbinato


Project Overview and Research Objectives

• Project idea– To develop a 30kW micro

CHP system able to provide heat and power for a more efficient energy end-use in buildings.

– The main objective of Sidera 30 is to introduce the novel concept of a Polymeric Electrolyte Membrane (PEM) Fuel Cell

In the EU there is a need for improved energy end-use efficiency

Centralized CHP System

Local Heat&Power Distribution System

Future Building


Project Overview and Research Objectives

• Project idea– tHE CHP system is 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 used in the 60s.


Functional Layout

Methane, methanol or bio-gas feed the catalytic burner.

Its main functions are:1. Raise of reformer’s temperature in order to

activate the catalytic reactions;2. Production of steam to be injected into the

process together with methane 3. Combustion of anodic Exhaust Gas


Catalytic steam reformingThe endothermic reaction is:

CH4 + H2O 3H2 + COtaking place in the presence of a proper catalyst as well as in a proper temperature range (650-800°C)

Up to 50-60% of H2 in the reaction products

DesulfurizerThe gas is filtered in order to assure

the membrane longer life time

Functional Layout


Water gas shiftIt consists in converting carbon monoxide in carbon

dioxide and again hydrogenCO + H2O CO2 + H2

The water gas shift reaction is an exothermic reaction taking place between CO and H2O in a proper temperature range (250 – 400°C) less than 1% of CO left in the syn-gas)

The gases pass through the first heat exchanger and their temperatute decrease from 700 / 800° C to less than 400°C

Functional Layout


Final conditioning in the fuel processor

Selective oxidation of remaining CO (PrOx)The chemical reaction is:

CO + 0.5 O2 CO2

The process consists in promoting the selective oxidation of the remaining CO in the mixture (CO < 15 ppm) in a temperature range of 90-200°C

The gases go through the second heat exchanger and their temperature decreases from circa 400°C to less then 200°C

In the last heat exchanger H2 temperature still decreases to suitable values for feeding PEM fuel cell

Functional Layout


Functional Layout


8

High Temperature Water

Natuaral Gas

Air

Anodic Exhaust GasLow Temperature Water

Medium Temperature Water Electrical Connections

Water Hydrogen / syn gas

Functional Layout


THANK YOU

crea 2008il futuro e’ verticale ici caldaie celle a combustibile per la micro generazione alberto...

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