Emerging Role for Absorption Chillers in Integrated Energy Systems in America

2002 ◽  
Author(s):  
Gearoid Foley ◽  
Richard Sweetser
Keyword(s):  
Energy Supply ◽  
Energy Systems ◽  
Prime Mover ◽  
Market Place ◽  
Distributed Energy ◽  
Absorption Chiller ◽  
Building Stock ◽  
Improve Energy Efficiency ◽  
Absorption Chillers ◽  
Integrated Energy Systems

President Bush’s National Energy Policy, Clear Skies and the Global Climate Change Initiatives form a comprehensive roadmap to a secure, clean, reliable, and affordable energy supply for the future. These far reaching policy proposals rely heavily on the development of distributed energy systems. The cornerstone of distributed energy systems is the emergence of Integrated Energy Systems (IES), which will permit consulting engineers to substantially improve energy efficiency. Thermally Activated Technologies, in general, and absorption chillers, in particular, are increasingly being viewed as an important element to effectively apply IES designs to the American building stock. This paper will examine testing, demonstration projects and commercial applications of combining absorption chiller equipment with microturbines, engines, combustion turbines and thermal solar systems. Technical challenges of coupling absorption chillers to prime mover exhaust streams will be explored. Application specific integration of coincident power generation and thermal energy supply to satisfy building loads will yield economic metrics that will determine which combinations of prime mover and absorption chiller will succeed in the market place today and which combinations require more research and development.

scholarly journals Optimal Planning for Energy Stations and Networks in Distributed Energy Systems Based on Voronoi Diagram and Load Characteristics

2021 ◽  
Vol 11 (16) ◽  
pp. 7526
Author(s):  
Jiazheng Wu ◽  
Jiamin Yuan ◽  
Yingjun Ruan ◽  
Fanyue Qian ◽  
Hua Meng
Keyword(s):  
Voronoi Diagram ◽  
Energy Supply ◽  
Energy Systems ◽  
Optimization Method ◽  
Distributed Energy ◽  
Relative Load ◽  
New Energy ◽  
Partition Method ◽  
The Cost ◽  
Station Location

In the existing station network planning of distributed energy systems (DESs), most of them determined the location of energy station in the alternative station site, there was a lack of a mature energy station location optimization method, and the factor load was not considered in the division of energy supply scope. This paper aimed to propose an optimal site approach for distributed energy stations based on Voronoi diagram, in which all possible candidates of energy station locations were considered. The candidate sites could be any point in the whole area. Simultaneously, after analyzing the limitations of the traditional energy supply partition method, we proposed a new energy supply partition optimization method, relative-load-distance. It was found that the annual cost of the whole system was significantly reduced by 1%, although the cost of the network in the optimized supply area was increased, compared with the supply area obtained by the partition method based on the principle of minimum distance. In addition, by adjusting the coefficient K in the relative-load-distance, the effectiveness of the optimization method in DES planning was verified.

Commercial Integrated Energy Systems Provide Data That Advance Combined Cooling, Heating, and Power

2006 ◽  
Author(s):  
Andrei Y. Petrov ◽  
Jeanette B. Berry ◽  
Abdolreza Zaltash
Keyword(s):  
Natural Gas ◽  
System Design ◽  
Gas Turbine ◽  
Energy Systems ◽  
Modular System ◽  
Absorption Chiller ◽  
Fuel Use ◽  
Oak Ridge ◽  
Integrated Energy Systems ◽  
Combined Cooling

The Department of Energy (DOE), though Oak Ridge National Laboratory (ORNL), has worked in partnership with industry to develop highly-efficient Integrated Energy Systems (IES) that provide combined cooling, heating, and power (CHP). Equipment configurations and performance have been optimized and system construction has been simplified, resulting in lower design and installation costs. Consequently, government-industry partnerships are achieving the goal of promoting replication of these advanced systems. This paper describes and presents data collected during the operation of on-site power generation systems developed and implemented by DOE/ORNL-industry teams: (1) Burns & McDonnell and (2) Honeywell Labs. The Burns & McDonnell IES is operated by Austin Energy, the municipal utility in Austin, Texas. The gas turbine produces 4.5-MW of electricity, and its exhaust drives a 2,500-ton absorption chiller. The featured project implements a modular system design that is being used to construct a medical district utility at Dell Children's Medical Center of Central Texas-another government-industry project carried out in partnership with Austin Energy. The Honeywell IES at Ft. Bragg, North Carolina, is anchored by 5.7-MW natural-gas turbine that uses turbine exhaust to drive a 1,000-ton absorption chiller and/or an 80,000-lb/h heat recovery steam generator. An optimization software program provides system operators with hour-by-hour information on system costs associated with various operating scenarios. The project developed reference designs for 1.2-5.7 MW turbine-based systems to better communicate options for system design and facilitate feasibility studies. These systems demonstrate the thermal and economic value of "waste heat" by providing space heating and/or cooling with no additional fuel use. Field data confirms that the fuel use efficiency of these combined cooling, heating and power systems approaches 80% based on the higher heating value (HHV) of natural gas.

scholarly journals Research on Interactive Scenarios and Mechanisms of Energy Supply and Use Modules of Park-level Integrated Energy System

2021 ◽  
Vol 236 ◽  
pp. 02007
Author(s):  
Zhao Pengxiang ◽  
Li Na ◽  
Li Zhiyuan ◽  
Wang Nan
Keyword(s):  
Energy Supply ◽  
Interaction Mechanism ◽  
Energy Systems ◽  
Clean Energy ◽  
Energy System ◽  
Distributed Energy ◽  
Energy Internet ◽  
Energy Storage Technology ◽  
Integrated Energy System ◽  
Smart Grid Technology

The integrated energy system can realize the complementary advantages of multiple energy sources and effectively solve the problem of low integrated energy efficiency of traditional energy systems. Carrying out research on the interactive scenarios and mechanisms of the energy supply and use modules of the integrated energy system is conducive to promoting the development of clean energy and promoting the indepth integration of energy Internet and distributed energy technology, smart grid technology, and energy storage technology. First, it summarizes the scenarios of the energy supply and use modules of the integrated energy system, and analyzes the interaction mechanism and paths of the energy supply and use modules of the integrated energy system on this basis.

scholarly journals Modeling of a Prosumer in Optimal Design Energy Systems Problem

2019 ◽  
Vol 102 ◽  
pp. 02001
Author(s):  
Evgeny Barakhtenko ◽  
Dmitry Sokolov ◽  
Veronica Tashlykova
Keyword(s):  
Optimal Design ◽  
Energy Supply ◽  
Energy Systems ◽  
Energy System ◽  
Economic Benefits ◽  
Supply System ◽  
Energy Supply System ◽  
District Energy ◽  
Integrated Energy Systems ◽  
Equipment Configuration

The conversion of existing energy systems to intelligent integrated energy systems can happen only if economic benefits due to introduction of the intelligent integrated energy systems will exceed required level of investments. Thus, it is necessary for every optimal design energy systems problem according to the purposes of the study to determine various aspects of equipment configuration, investment and a proposed unit commitment on a case-by-case basis. The studies, taking under consideration energy efficiency of renewable energy units, are particularly important as environmental safety standards are increasing. In the paper optimal design of prosumer energy supply system problem in the intelligent integrated energy system was investigated. For this purpose a super structure for an energy supply system includes different generating capacities with relevant power range. The superstructure for prosumer energy supply system consists of an electric boiler, a gas-fired boiler, a solar photo-voltaic, a solar heating system and a gas-fired CHP. An ability of district energy system to receive the excess generating energy is restricted by the constraints. The heat and electricity tariffs and the received to district energy supply system energy constraints are varying according to time period. As a result of this study, cost-effectiveness analysis of chosen equipment configuration was undertaken.

scholarly journals Intelligent control algorithm for autonomous integrated power plants for Arctic regions

2021 ◽  
Vol 16 (4) ◽  
pp. 74-82
Author(s):  
Yuri V. Sinyavsky ◽  
◽  
Elena A. Kirillova ◽  
◽  
◽  
...  
Keyword(s):  
Control System ◽  
Power Plant ◽  
Intelligent Control ◽  
Energy Supply ◽  
Control Algorithm ◽  
Power Plants ◽  
Energy Systems ◽  
Integrated Energy Systems ◽  
Arctic Regions ◽  
Complex Power

The article considers the information and technical aspects of an innovative autonomous integrated power plant management, including alternative energy sources and a diesel generator set, as well as controlled inverters that provide energy supply to consumers of various priority categories, which can be used in the Arctic regions of the Russian Federation. The main aspects of creating innovative systems are considered and it is determined that the creation of integrated energy systems requires a significant deepening of cooperation between national producers in order to ensure the scalability of integrated energy systems by ensuring the unity of information means of data exchange between individual modules and the control system. It is shown that a specific requirement for control systems of complex power plants is the requirement of high autonomy, including the ability to provide consumers with electricity under variable environmental conditions without direct intervention of operational personnel. The article substantiates the division of the information and algorithmic support of the control system of a complex power plant into two modules – analytical and control. For the analytical module, an algorithm is proposed that ensures the development of control solutions in a complex energy system, ensuring the stability of energy supply to the most important consumers. At the same time, the algorithm provides an increase in the reliability of the energy storage device based on Li-Ion batteries used in the system not only by eliminating excessive charge and deep discharge, but also by reducing the number of charge/discharge cycles. The solution of system autonomy problem is provided by a multivariate algorithm for predicting weather conditions using statistical data and methods for analyzing fuzzy time series. The intelligent control algorithm was implemented in C++, the weather forecasting algorithms were implemented in Python using the ANFIS library.

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