Operational Characteristics of 36 kW PEMFC-CHP Unit
Jarosław Milewski , Marcin Wołowicz , Krzysztof Badyda , Z. Misztal
AbstractThe paper presents operational characteristics of start-up and shut-down of a 30kW micro Combined Heat and Power (μ-CHP) system. The main objective of the μ-CHP unit is to introduce the novel concept of a Polymeric Electrolyte Membrane Fuel Cell based CHP (μ-CHP-PEMFC) system able to supply heating (heating and sanitary water), cooling and electricity. Whereas the plant description was provided in the previous paper (Rynek Energii 5(90) 2010), the objectives of this paper are the main aspects of the start-up and shut-down procedures which were performed in situ. The plant is composed of three main units: reformer, CO oxidizer (reactor “water gas shift” and oxidation reactor – “prox”), and PEMFC. The sequence of the start-up procedure is as follows: heating up the reformer and CO oxidizer to a temperature of 700- 800°C. A double-fuel burner is used to heat up the reformer. Then composition of the gas leaving the reformer is then checked. The outlet gas from the first part of the reformer (called syngas) contains about 5% CO, which is destructive for fuel cells such as PEM. The maximum acceptable level of CO in fuel for this category of fuel cell is approximately 25ppm. In the second part of the reformer, CO is reduced in catalytic reactions. This is the most difficult and time-consuming process due to the high sensitivity and inertia of the whole cycle. After adjusting some parameters, much time is needed to stabilize the process and check the results of the changes. After achieving the required CO levels in syngas, the control valve can be opened to feed the fuel cell and start production of combined heat and power.
|Journal series||Rynek Energii, ISSN 1425-5960, (B 10 pkt)|
|Publication size in sheets||0.5|
|Keywords in Polish||polimerowe ogniwa paliwowe, elektrociepłownia|
|Publication indicators||= 4; = 9; = 8.0; : 2011 = 1.312; : 2010 = 0 (2)|
|Citation count*||8 (2020-03-17)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.