Abstract
This paper presents the results of estimation energy efficiency, the collation data of thermodynamic calculations and data on material balance for an assessment of electric and thermal components in considered ways to use convention products, performance enhancement in the tandem system containing the high-temperature fuel cell and the low-temperature fuel cell with full heat regeneration for hydrogenous fuel (CH 4 ). The overall effective efficiency (η Σef . making full use of the recovered heat) considered tandem system depends on the efficiency of its constituent fuel cells. The overall effective efficiency of the tandem installation including the fuel converter, separating system, high-temperature oxidation system, and hydrogen disposal system in case of fuel use in the low-temperature fuel cell, is higher than for each of the fuel cell elements separately.
Highlights
An integrated approach to the task of creation the economic systems of power supply involves obtaining electricity and heat in systems with heat recovery, which will reduce losses and improve the reliability of the process of ensuring energy consumer [1].Natural gas is currently the main energy resource in a global sense, and the cheapest source for hydrogen production [1,2], but the task of the active involvement of renewable energy, it becomes actual at the present moment [2,3,4,5]
This paper presents the results of estimation energy efficiency, the collation data of thermodynamic calculations and data on material balance for an assessment of electric and thermal components in considered ways to use convention products, performance enhancement in the tandem system containing the high-temperature fuel cell and the low-temperature fuel cell with full heat regeneration for hydrogenous fuel (CH4)
Estimation of the effective efficiency tandem diverse temperature oxidation system was carried out in two ways: based on the Gibbs energy change (∆G) stages helpful electrical work is done in a lowtemperature fuel cells and high-temperature fuel cells [21] and heat balance burnt fuel (ΔQ) making full use of the recovered heat
Summary
An integrated approach to the task of creation the economic systems of power supply involves obtaining electricity and heat in systems with heat recovery, which will reduce losses and improve the reliability of the process of ensuring energy consumer [1].Natural gas is currently the main energy resource in a global sense, and the cheapest source for hydrogen production [1,2], but the task of the active involvement of renewable energy, it becomes actual at the present moment [2,3,4,5]. Energy resource biomethane is of interest for autonomous energy supply and basic [3,4,5,6,7,8] in problems of urban civil engineering and municipal facilities [9,10,11,12]. Use for these purposes fuel cells, offering direct energy conversion supplied fuel into electrical energy, is a promising direction for the solution of such tasks [1,3,4,5,6,13]. Even with the structural chain simplification, i.e. in the flow and reforming conditions and electrochemical reactions in a one system (in the fuel cell) ensuring the heat exchange conditions for the heat recovery [15] has some essential faults:
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