Study of Methods to Enhance Energy Utilization Efficiency of Micro Combined Heat and Power Generation Unit-Equipped with an Extended Expansion Linkage Engine and Reduction of Waste Energy

2011 ◽  
Author(s):  
Yoshiharu Takita ◽  
Shohei Kono ◽  
Atsumu Naoi
Keyword(s):  
Power Generation ◽  
Combined Heat And Power ◽  
Energy Utilization ◽  
Utilization Efficiency ◽  
Power Generation Unit ◽  
Waste Energy ◽  
Generation Unit

Optimal Power Generation Unit Sizing for Base-Loaded Combined Heat and Power Systems Using Monthly vs. Hourly Time-Steps

2012 ◽  
Author(s):  
Robert Thomas ◽  
Rogelio Luck ◽  
Pedro J. Mago
Keyword(s):  
Power Generation ◽  
Annual Cost ◽  
Cost Savings ◽  
The United States ◽  
Combined Heat And Power ◽  
Environmental Benefits ◽  
Optimal Size ◽  
Loading Conditions ◽  
Power Generation Unit ◽  
Generation Unit

In many applications combined heat and power (CHP) systems provide both cost and environmental benefits when used in place of traditional grid utility systems. The benefits of CHP systems, however, are very sensitive to the proper selection of the system’s components for given loading conditions, especially the power generation unit (PGU). The PGU size should be selected based on the facility’s electrical and thermal loading conditions to generate the maximum cost savings. Many researchers have presented methods for selecting the optimal PGU size using hourly load data. However, hourly load data is seldom available for a facility. For this reason, this paper provides a series of calculations that determine the optimal PGU size based on annual cost savings for a base-loaded CHP system using monthly load data, which is representative of a facility’s utility bills that are always available. Furthermore, because resale of excess electricity to the grid is widely available in the United States and other countries, this capability is included in the equations presented in this paper. Unfortunately, in some cases monthly-based calculations do not provide enough information to properly determine the optimal size of the PGU. A case study is performed to compare the results of monthly-based and hourly-based calculations for sixteen benchmark buildings in Albuquerque, NM and Baltimore, MD to investigate when monthly-based calculations can be used. It is noted that resale of excess electricity is considered in Baltimore, but not considered in Albuquerque for this study. A statistical analysis of the results uncovers that the magnitude of the coefficient of variation of the building’s heating demand indicates whether monthly-based calculations can be used, and furthermore, whether annual cost savings are possible. Results indicate that the proposed monthly-based calculations can determine the optimal PGU size, and calculate annual cost savings for approximately half of the facilities in Albuquerque and Baltimore. Further studies must be performed to determine a broader range of locations where this monthly-based calculation strategy is valid.

scholarly journals Characterization and Optimization of Heat Recovery in a Combined Heat and Power Generation Unit

2019 ◽  
Vol 63 (2-4) ◽  
pp. 447-451
Author(s):  
Michela Costa ◽  
Domenico Cirillo ◽  
Vittorio Rocco ◽  
Raffaele Tuccillo ◽  
Maurizio La Villetta
Keyword(s):  
Power Generation ◽  
Heat Recovery ◽  
Combined Heat And Power ◽  
Power Generation Unit ◽  
Generation Unit

scholarly journals Energy efficiency of cogeneration utilization of residual heat of flue gases during the drying of coal concentrate in pipe-dryers

2019 ◽  
Vol 109 ◽  
pp. 00065
Author(s):  
Yurii Oksen ◽  
Maksym Radiuk ◽  
Yurii Komissarov ◽  
Mykhailo Kirsanov
Keyword(s):  
Power Generation ◽  
Electric Energy ◽  
Thermal Conditions ◽  
Hot Water ◽  
Flue Gases ◽  
Thermal Mode ◽  
Heat Power ◽  
Heat Potential ◽  
Power Generation Unit ◽  
Generation Unit

The possibility of increasing the efficiency of drying coal concentrate unit on the basis of pipe-dryers has been investigated by converting the heat of flue gases outlet into electrical energy and the heat potential of hot water supply system with a heat power generation unit operating on low-boiling working fluids. A method and an algorithm for calculating the thermal mode of the unit under the conditions of specified limitations on temperature pressures in heat exchangers have been developed. On the basis of mathematical modeling of thermal conditions, it has been found that under the conditions of PD-11 pipe-dryers, when the heat power generation unit operates with butane-pentane mixture, 204 kW of electricity can be generated with the condensation cycle, and 1780 kW of heat and 65 kW of electric energy can be generated with the heating cycle.

scholarly journals Modelling and Optimization of the Direct Air Cooling Power Generation Unit

2018 ◽  
Vol 51 (28) ◽  
pp. 696-701 ◽  
Author(s):  
Mingjuan Zhu ◽  
Jiong Shen ◽  
Kwang Y. Lee ◽  
Xiao Wu
Keyword(s):  
Power Generation ◽  
Cooling Power ◽  
Air Cooling ◽  
Power Generation Unit ◽  
Generation Unit ◽  
Modelling And Optimization
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