Performance analysis of CCHP and CHP systems operating following the thermal and electric load

Abstract

SUMMARYHeating and cooling energy requirements for buildings are usually supplied by separated systems such as furnaces or boilers for heating, and vapor compression systems for cooling. For these types of buildings, the use of combined cooling, heating, and power (CCHP) systems or combined heating and power (CHP) systems are an alternative for energy savings. Different researchers have claimed that the use of CCHP and CHP systems reduces the energy consumption related to transmission and distribution of energy. However, most of these analyses are based on reduction of operating cost without measuring the actual energy use and emissions reduction. The objective of this study is to analyze the performance of CCHP and CHP systems operating following the electric load (FEL) and operating following the thermal load (FTL), based on primary energy consumption (PEC), operation cost, and carbon dioxide emissions (CDE) for different climate conditions. Results show that CCHP and CHP systems operated FTL reduce the PEC for all the evaluated cities. On the other hand, CHP systems operated FEL always increases the PEC. The only operation mode that reduces PEC and CDE while reducing the cost is CHP-FTL.

Influence of Maintenance Intervals on Performance and Emissions of a 192 kWel Biogas Gas Otto CHP Unit and Results of Lubricating Oil Quality Tests—Outcome from a Continuous Two-Year Measuring Campaign

“…However, the economic, environmental and technical performance of CHP systems, and their use in industry and buildings, has been described by various authors [4,[23][24][25][26][27]. Pourmovahed et al [27] tested the performance of 7 kW th and 1 kW el biogas CHP units in terms of thermal and electrical power output, individual and overall efficiencies, as well as exhaust gas emissions.…”

Two-stage method for optimal operation of a distributed energy system

“…Facci [12] chose dynamic programming method to optimize the CHP system's operation strategy for economic analysis. Chandan [17] used an interiorpoint algorithm, while Rong [13] used Lagrangian relaxation to solve a similar problem. In the current study, considering the problem size and the computational complexity, a twostage approach combining PSO and SQP is employed to solve the NLP problem.…”

Trigeneration Plants in Italian Large Retail Sector: a Calculation Model for the TPF Projects with Evaluation of all the Incentivizing Mechanisms

“…This variable is particularly important and in the case of the second option, it gives an operation optimized according to the real user consumption [8].…”