scholarly journals Advanced System Controls and Energy Savings for Industrial Boilers

2006 ◽  
Author(s):  
Daniel Willems
Keyword(s):  
Natural Gas ◽  
Heat Recovery ◽  
Energy Savings ◽  
High Tech ◽  
Energy Prices ◽  
Energy Demands ◽  
Crude Oil Prices ◽  
Industrial Boilers ◽  
Boiler Design ◽  
One Year

The price of natural gas exceeded $15/MM Btu in December 2005 compared to $6/MM Btu just one year ago! It was also just $2/MM Btu in the 1990’s. Crude oil prices exceeded $70/barrel in 2005 compared to $45/barrel just one year ago! To put this into perspective, a 600 HP boiler operating at a 50% average load for 12 hours per day, 365 days per year would have consumed $321,800 in natural gas one year ago but will consume $804,490 in natural per year at today’s cost! The increased cost of fuel has affected operational costs for all boilers regardless of size, age, or manufacturer. The US dependence on foreign oil and natural gas, as well as the escalating energy demands of China, India, and other countries will likely drive energy prices higher in the future. This increase in the cost of fuel has driven responsible boiler manufacturers to develop new products or modify existing ones in order to reduce energy consumption. Major developments have been made in the past few years which improve boiler efficiency, offer innovative heat recovery systems, and integrate high tech controls into boiler systems. This paper will address the developments in boiler design, control systems, and heat recovery systems which all contribute to energy savings. Paper published with permission.

scholarly journals The Causality Relationship between Energy Prices and Developed Countries Indices

2020 ◽  
Vol 2 (2) ◽  
pp. 1-18
Author(s):  
Yakup Soylemez
Keyword(s):  
Natural Gas ◽  
Stock Market ◽  
Crude Oil ◽  
Developed Countries ◽  
Energy Prices ◽  
G7 Countries ◽  
Causality Test ◽  
Developed Country ◽  
Crude Oil Prices ◽  
Causality Relationship

The aim of this study is to determine the causality relationship between energy prices, which are among the most important inputs of the economy, and selected stock market indices of developed countries. Crude oil and natural gas are used as energy variables. G7 countries were selected to represent developed countries. Stock indices used in the study are Dow&Jones (USA), DAX (Germany), CAC40 (France), FTSE250 (England), FTSE Italia All-Share (Italy), NIKKEI225 (Japan), and S&P/TSX (Canada). In the study, Johansen (1988) cointegration test and Granger (1969) causality test were used to analyze the causality relationship between energy prices and selected stock market indices. The research could not find a long-term balance relationship between energy prices and developed country indices. Also, while the causality relationship was determined between crude oil prices and NIKKEI225, DAX, and CAC40 indices, a causal relationship between natural gas prices and Dow&Jones and FTSE250 indices was determined. In the study, it was found that energy prices can be used for diversification in investments to be made with stock market indices of developed countries. This study is one of the most comprehensive studies in the literature that examines the relationship between energy prices and the stock market indices of G7 countries. It is expected to contribute to the literature in this way.

scholarly journals Natural gas turbo-expander systems: A dynamic simulation model for energy and economic analyses

2018 ◽  
Vol 22 (5) ◽  
pp. 2215-2233 ◽  
Author(s):  
Giovanni Barone ◽  
Annamaria Buonomano ◽  
Francesco Calise ◽  
Adolfo Palombo
Keyword(s):  
Natural Gas ◽  
Simulation Model ◽  
Dynamic Simulation ◽  
Energy Savings ◽  
Mechanical Energy ◽  
Hydrate Formation ◽  
Weather Conditions ◽  
Primary Energy ◽  
Energy Prices ◽  
Expansion System

Natural gas is typically transported for long distances through high pressure pipelines. Such pressure must be reduced before the gas distribution to users. The natural gas lamination process, traditionally adopted for this scope, may determine hydrate formation which may damagingly affect the system operation. Therefore, in order to avoid such circumstance, a suitable gas preheating is required. On the other hand, the available pressure drop can be recovered through a turbo-expansion system in order to provide mechanical energy to drive electricity generators. In this case a higher gas preheating is necessary. This paper presents a detailed simulation model capable to accurately analyse this process as well as the traditional decompression one. Such new model, implemented in a computer tool written in MATLAB, allows one to dynamically assess the energy, economic and environmental performance of these systems, by also taking into account hourly energy prices and weather conditions. Two turbo-expansion system layouts are modelled and simulated. In particular, the gas preheating is obtained by considering two different scenarios: gas-fired heater or solar thermal collectors. Another novelty of the presented dynamic simulation tool is the capability to take into account the time fluctuations of electricity feed-in and purchase tariffs. Finally, a suitable case study relative to a gas decompression station located in South Italy is also presented. Here, a remarkable primary energy savings and avoided CO2 emissions can be obtained through the examined turbo-expansion systems vs. traditional decompression ones. Results show that the economic profitability of the investigated novel technology depends on the available gas pressure drops and flow rates and on the produced electricity use.

Utilization of Indirect Adiabatic Cooling in Heat Recovery Device

2013 ◽  
Vol 649 ◽  
pp. 307-310
Author(s):  
Ondřej Nehasil ◽  
Daniel Adamovský
Keyword(s):  
Heat Exchanger ◽  
Heat Load ◽  
Air Conditioning ◽  
Heat Recovery ◽  
Energy Savings ◽  
Economic Benefits ◽  
Calculation Procedure ◽  
Energy Demands ◽  
Adiabatic Cooling

Decreasing heat load of buildings and their cooling is a major problem affecting the quality of both inner environment and air-conditioning system's energy demands. One of the alternatives using regular components of a standard air-conditioning unit is indirect adiabatic cooling. By means of a customized calculation procedure, this article demonstrates performance possibilities, energy savings and the economic benefits of indirect adiabatic cooling connected with a heat recovery heat exchanger on two air-conditioning unit alternatives.

scholarly journals The causality relationship between energy prices and developed countries indices

2021 ◽  
Vol 3 (2) ◽  
pp. 24-40
Author(s):  
Yakup Soylemez
Keyword(s):  
Natural Gas ◽  
Stock Market ◽  
Crude Oil ◽  
Developed Countries ◽  
Energy Prices ◽  
G7 Countries ◽  
Causality Test ◽  
Developed Country ◽  
Crude Oil Prices ◽  
Causality Relationship

The aim of this study is to determine the causality relationship between energy prices, which are among the most important inputs of the economy, and selected stock market indices of developed countries. Crude oil and natural gas are used as energy variables. G7 countries were selected to represent developed countries. Stock indices used in the study are Dow & Jones (USA), DAX (Germany), CAC40 (France), FTSE250 (England), FTSE Italia All Share (Italy), NIKKEI225 (Japan), and S&P/TSX (Canada). In the study, Johansen (1988) cointegration test and Granger (1969) causality test were used to analyse the causality relationship between energy prices and selected stock market indices. The research could not find a long-term balance relationship between energy prices and developed country indices. Also, while the causality relationship was determined between crude oil prices and NIKKEI225, DAX, and CAC40 indices, a causal relationship between natural gas prices and Dow & Jones and FTSE250 indices was determined. In the study, it was found that energy prices can be used for diversification in investments to be made with stock market indices of developed countries. This study is one of the most comprehensive studies in the literature that examines the relationship between energy prices and the stock market indices of G7 countries. It is expected to contribute to the literature in this way.

Saving Primary Energy Consumption Through Exergy Analysis of Combine Distillation and Power Plant

2012 ◽  
Vol 9 (2) ◽  
pp. 65
Author(s):  
Alhassan Salami Tijani ◽  
Nazri Mohammed ◽  
Werner Witt
Keyword(s):  
Energy Consumption ◽  
Power Plant ◽  
Heat Pump ◽  
Heat Recovery ◽  
Energy Savings ◽  
Primary Energy ◽  
Heat Pumps ◽  
Saturated Steam ◽  
Distillation Unit ◽  
Primary Energy Consumption

Industrial heat pumps are heat-recovery systems that allow the temperature ofwaste-heat stream to be increased to a higher, more efficient temperature. Consequently, heat pumps can improve energy efficiency in industrial processes as well as energy savings when conventional passive-heat recovery is not possible. In this paper, possible ways of saving energy in the chemical industry are considered, the objective is to reduce the primary energy (such as coal) consumption of power plant. Particularly the thermodynamic analyses ofintegrating backpressure turbine ofa power plant with distillation units have been considered. Some practical examples such as conventional distillation unit and heat pump are used as a means of reducing primary energy consumption with tangible indications of energy savings. The heat pump distillation is operated via electrical power from the power plant. The exergy efficiency ofthe primary fuel is calculated for different operating range ofthe heat pump distillation. This is then compared with a conventional distillation unit that depends on saturated steam from a power plant as the source of energy. The results obtained show that heat pump distillation is an economic way to save energy if the temperaturedifference between the overhead and the bottom is small. Based on the result, the energy saved by the application of a heat pump distillation is improved compared to conventional distillation unit.

Accelerating oil and gas investment and reserves by design

2018 ◽  
Vol 58 (2) ◽  
pp. 557
Author(s):  
Barry A. Goldstein
Keyword(s):  
Natural Gas ◽  
Fossil Fuels ◽  
Oil And Gas ◽  
South Australia ◽  
Land Access ◽  
Oil And Gas Exploration ◽  
Oil And Gas Producers ◽  
Crude Oil Prices ◽  
Exploration And Production ◽  
Oil And Gas Operations

Facts are stubborn things; and whatever may be our wishes, our inclinations, or the dictates of our passion, they cannot alter the state of facts and evidence (Adams 1770). Some people unfamiliar with upstream petroleum operations, some enterprises keen to sustain uncontested land use, and some people against the use of fossil fuels have and will voice opposition to land access for oil and gas exploration and production. Social and economic concerns have also arisen with Australian domestic gas prices tending towards parity with netbacks from liquefied natural gas (LNG) exports. No doubt, natural gas, LNG and crude-oil prices will vary with local-to-international supply-side and demand-side competition. Hence, well run Australian oil and gas producers deploy stress-tested exploration, delineation and development budgets. With these challenges in mind, successive governments in South Australia have implemented leading-practice legislation, regulation, policies and programs to simultaneously gain and sustain trust with the public and investors with regard to land access for trustworthy oil and gas operations. South Australia’s most recent initiatives to foster reserve growth through welcomed investment in responsible oil and gas operations include the following: a Roundtable for Oil and Gas; evergreen answers to frequently asked questions, grouped retention licences that accelerate investment in the best of play trends; the Plan for ACcelerating Exploration (PACE) Gas Program; and the Oil and Gas Royalty Return Program. Intended and actual outcomes from these initiatives are addressed in this extended abstract.

Feasibility Study of a Supercritical Cycle as a Waste Heat Recovery System

2013 ◽  
Author(s):  
Antonio Agresta ◽  
Antonella Ingenito ◽  
Roberto Andriani ◽  
Fausto Gamma
Keyword(s):  
Power Systems ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Power Plants ◽  
Energy Savings ◽  
Waste Heat ◽  
Rankine Cycle ◽  
Waste Heat Recovery System ◽  
Recovery System ◽  
Organic Fluids

Following the increasing interest of aero-naval industry to design and build systems that might provide fuel and energy savings, this study wants to point out the possibility to produce an increase in the power output from the prime mover propulsion systems of aircrafts. The complexity of using steam heat recovery systems, as well as the lower expected cycle efficiencies, temperature limitations, toxicity, material compatibilities, and/or costs of organic fluids in Rankine cycle power systems, precludes their consideration as a solution to power improvement for this application in turboprop engines. The power improvement system must also comply with the space constraints inherent with onboard power plants, as well as the interest to be economical with respect to the cost of the power recovery system compared to the fuel that can be saved per flight exercise. A waste heat recovery application of the CO2 supercritical cycle will culminate in the sizing of the major components.

Design of a heat recovery unit using exhaust gases for energy savings in an absorption air conditioning unit

2021 ◽  
pp. 117031
Author(s):  
Mostafa El-Shafie ◽  
M. Khalil Bassiouny ◽  
Shinji Kambara ◽  
Samy M. El-Behery ◽  
A.A. Hussien
Keyword(s):  
Air Conditioning ◽  
Heat Recovery ◽  
Energy Savings ◽  
Exhaust Gases ◽  
Recovery Unit

Energy consumption optimization for AC drives position control

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Branislav Ftorek ◽  
Milan Saga ◽  
Pavol Orsansky ◽  
Jan Vittek ◽  
Peter Butko
Keyword(s):  
Control System ◽  
Energy Saving ◽  
Energy Savings ◽  
Position Control ◽  
Control Strategies ◽  
Content Type ◽  
Ac Drives ◽  
Energy Demands ◽  
Wide Range ◽  
Energy Consumption Optimization

Purpose The main purpose of this paper is to evaluate the two energy saving position control strategies for AC drives valid for a wide range of boundary conditions including an analysis of their energy expenses. Design/methodology/approach For energy demands analysis, the optimal energy control based on mechanical and electrical losses minimization is compared with the near-optimal one based on symmetrical trapezoidal speed profile. Both control strategies respect prescribed maneuver time and define acceleration profile for preplanned rest-to-rest maneuver. Findings Presented simulations confirm lower total energy expenditures of energy optimal control if compared with near-optimal one, but the differences are only small due to the fact that two energy saving strategies are compared. Research limitations/implications Developed overall control system consisting of energy saving profile generator, pre-compensator and position control system respecting principles of field-oriented control is capable to track precomputed state variables precisely. Practical implications Energy demands of both control strategies are verified and compared to simulations and preliminary experiments. The possibilities of energy savings were confirmed for both control strategies. Originality/value Experimental verification of designed control structure is sufficiently promising and confirmed assumed energy savings.

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