Carbon footprint analysis of a combined cooling heating and power system

Abstract Combined Cooling, Heating and Power (CCHP) systems are safe, efficient, and environmentally friendly systems, which have been widely used all over the world. However, the greenhouse gas emission problems of CCHP systems have not been fully studied. This research adopted a multi-product carbon footprint (MPCF) method to assess the greenhouse gas emissions of a CCHP system. Activity data, mass and energy balances were checked to ensure the accuracy of the assessment. To solve the allocation problems, the authors introduced the concept of carbon footprint contribution rate, x j , and presented an applicable expression of x j for CCHP systems. The MPCF calculations showed that without optimization the total MPCF of the CCHP system is 8.071 kg-CO 2 e/kW h-prod and direct MPCF occupies the carbon footprint overwhelmingly. Moreover, an optimization thought that MPCF can be decreased by increasing the amount of cooling output was proposed theoretically. To corroborate the thought, a dehumidifier unit has been incorporated into the original CCHP system. Compared with the original system, results show that the MPCF of the optimized CCHP system drops by 7.5% while the total carbon emissions rise only by 0.5%, which means the CCHP system after optimization can produce more products than before but only with a small increase of environmental costs.

[1]  Pedro J. Mago,et al.  Energy, economic, and environmental analysis of combined heating and power-organic Rankine cycle and combined cooling, heating, and power-organic Rankine cycle systems , 2011 .

[2]  Gershon Grossman,et al.  Experimental investigation of a liquid desiccant system for solar cooling and dehumidification , 2007 .

[3]  Ruzhu Wang,et al.  COMBINED COOLING, HEATING AND POWER: A REVIEW , 2006 .

[4]  Pedro J. Mago,et al.  Micro-combined cooling, heating and power systems hybrid electric-thermal load following operation , 2010 .

[5]  Hans-Jürgen Dr. Klüppel,et al.  The Revision of ISO Standards 14040-3 - ISO 14040: Environmental management – Life cycle assessment – Principles and framework - ISO 14044: Environmental management – Life cycle assessment – Requirements and guidelines , 2005 .

[6]  Yang Shi,et al.  Combined cooling, heating and power systems: A survey , 2014 .

[7]  Peng Sun,et al.  Analysis of combined cooling, heating, and power systems under a compromised electric–thermal load strategy , 2014 .

[8]  Arif Hepbasli,et al.  Advanced exergy analysis of an electricity-generating facility using natural gas , 2014 .

[9]  Pierluigi Mancarella,et al.  Assessment of the greenhouse gas emissions from cogeneration and trigeneration systems. Part I: Models and indicators , 2008 .

[10]  D. Zheng,et al.  Assessment of energy use and carbon footprint for low-rank coal-based oxygen-thermal and electro-thermal calcium carbide manufacturing processes , 2014 .

[11]  S. Solomon.  The Physical Science Basis : Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change , 2007 .

[12]  Noam Lior,et al.  Energy, exergy, and Second Law performance criteria , 2007 .

[13]  Ruzhu Wang,et al.  Energy efficiency and economic feasibility of CCHP driven by stirling engine , 2004 .

[14]  Pedro J. Mago,et al.  Analysis of a combined cooling, heating, and power system model under different operating strategies with input and model data uncertainty , 2010 .

[15]  Hongguang Jin,et al.  The exergy and energy level analysis of a combined cooling, heating and power system driven by a small scale gas turbine at off design condition , 2014 .

[16]  Uday Kumar,et al.  Development of Natural Gas Fired Combined Cycle Plant for Tri-Generation of Power, Cooling and Clean Water Using Waste Heat Recovery: Techno-Economic Analysis , 2014 .

[17]  B. Weidema,et al.  Carbon Footprint , 2008 .

[18]  Pedro J. Mago,et al.  Analysis and optimization of CCHP systems based on energy, economical, and environmental considerations , 2009 .

[19]  V. Siva Reddy,et al.  Exergetic analysis of a vapour compression refrigeration system with R134a, R143a, R152a, R404A, R407C, R410A, R502 and R507A , 2012, Clean Technologies and Environmental Policy.

[20]  Pedro J. Mago,et al.  Evaluation of the performance of combined cooling, heating, and power systems with dual power generation units , 2014 .

[21]  J.A.R. Parise,et al.  Thermoeconomic assessment of a multi-engine, multi-heat-pump CCHP (combined cooling, heating and power generation) system – A case study , 2010 .

[22]  B. Hedman,et al.  Creating markets for combined heat and power and clean distributed generation in New York State. , 2003, Environmental pollution.

[23]  J. Minx,et al.  A definition of “carbon footprint” , 2010 .

[24]  Saffa Riffat,et al.  A combined heat and power system for buildings driven by solar energy and gas , 2002 .

[25]  Danxing Zheng,et al.  Effect of cycle coupling-configuration on energy cascade utilization for a new power and cooling cogeneration cycle , 2014 .

[26]  Nelson Fumo,et al.  Emission operational strategy for combined cooling, heating, and power systems , 2009 .

[27]  Yiping Dai,et al.  Multi-objective optimization of a combined cooling, heating and power system driven by solar energy , 2015 .

[28]  Gershon Grossman,et al.  Simulation and analysis of an open-cycle dehumidifier-evaporator-regenerator (DER) absorption chiller for low-grade heat utilization , 1995 .

[29]  Zaijun Wu,et al.  Modeling, planning and optimal energy management of combined cooling, heating and power microgrid: A review , 2014 .

[30]  Tzong-Shing Lee,et al.  Thermodynamic analysis of optimal condensing temperature of cascade-condenser in CO2/NH3 cascade refrigeration systems , 2005 .