A system comprising: one or more fuel cell stacks each including fuel cells configured to generate electric current based on fuel and air supplied to the fuel cells; one or more fuel heat exchangers configured to exchange heat between the fuel supplied to the fuel cells for generating the electric current and a first portion of fuel that is output from the fuel cells; one or more tail gas oxidizers configured to receive a second portion of the fuel that is output from the fuel cells and air that is output from the fuel cells, the one or more tail gas oxidizers configured to oxidize the second portion of the fuel with the effluent that is output from the fuel cells, so as to output an oxidized effluent; and one or more air heat exchangers configured to exchange heat between the air supplied to the fuel cells for generating the electric current and the oxidised effluent, wherein the one or more fuel cell stacks are fluidly coupled with the one or more fuel heat exchangers and the one or more tail gas oxidizers such that the fuel that is output from the fuel cells is split into the first portion that is directed back into the one or more fuel heat exchangers and the second portion that is directed into the one or more tail gas oxidizers; characterized in that: i) the one or more fuel cell stacks are disposed between and directly coupled with the one or more fuel heat exchangers and the one or more tail gas oxidizers; or ii) the one or more fuel heat exchangers are coupled to one end of the one or more fuel cell stacks and the one or more tail gas oxidizers and the one or more air heat exchangers are coupled to an opposite end of the one or more fuel cell stacks, wherein the one or more tail gas oxidisers are directly coupled to the one or more fuel cell stacks. one or more fuel cell stacks each including fuel cells configured to generate electric current based on fuel and air supplied to the fuel cells; one or more fuel heat exchangers configured to exchange heat between the fuel supplied to the fuel cells for generating the electric current and a first portion of fuel that is output from the fuel cells; one or more tail gas oxidizers configured to receive a second portion of the fuel that is output from the fuel cells and air that is output from the fuel cells, the one or more tail gas oxidizers configured to oxidize the second portion of the fuel with the effluent that is output from the fuel cells, so as to output an oxidized effluent; and one or more air heat exchangers configured to exchange heat between the air supplied to the fuel cells for generating the electric current and the oxidised effluent, wherein the one or more fuel cell stacks are fluidly coupled with the one or more fuel heat exchangers and the one or more tail gas oxidizers such that the fuel that is output from the fuel cells is split into the first portion that is directed back into the one or more fuel heat exchangers and the second portion that is directed into the one or more tail gas oxidizers; characterized in that: i) the one or more fuel cell stacks are disposed between and directly coupled with the one or more fuel heat exchangers and the one or more tail gas oxidizers; or ii) the one or more fuel heat exchangers are coupled to one end of the one or more fuel cell stacks and the one or more tail gas oxidizers and the one or more air heat exchangers are coupled to an opposite end of the one or more fuel cell stacks, wherein the one or more tail gas oxidisers are directly coupled to the one or more fuel cell stacks. i) the one or more fuel cell stacks are disposed between and directly coupled with the one or more fuel heat exchangers and the one or more tail gas oxidizers; or ii) the one or more fuel heat exchangers are coupled to one end of the one or more fuel cell stacks and the one or more tail gas oxidizers and the one or more air heat exchangers are coupled to an opposite end of the one or more fuel cell stacks, wherein the one or more tail gas oxidisers are directly coupled to the one or more fuel cell stacks.