SPE

Collaborating Authors

Enhanced Efficiency and CO2 Emission Reduction in the O&G Sector Through Organic Rankine Cycle Technology

Ferrari, T. (Turboden S.r.l.) | Rossetti, N. (Turboden S.r.l.) | Archetti, D. (Turboden S.r.l.)

OnePetroMarch, 2017

ABSTRACT According to the International Energy Agency outlook, the global demand for natural gas will rise over the next 5 years. At the same time, the 195 participating countries at the COP21 agreed to reduce emissions as part of the method for reducing greenhouse gas. Within this context, the O&G industry will have to play a key role on both these fields. A more sustainable and responsible use of energy within the O&G processes is a prompt and effective way to address both the issues. There are various methods to improve energy efficiency; some of the promising opportunities can leverage Organic Rankine Cycle (ORC) technology, a thermodynamic cycle that uses a high molecular mass fluid as working fluid allowing converting residual, low-grade heat into useful power. This paper brings to light the latest developments of the ORC-based heat recovery solutions for the O&G processes, with reference to concrete experiences in the O&G sector. In addition, the paper will analyse case studies related to Egyptian GCS (Gas Compressor Stations) where thermal power wasted by gas turbines is transformed into useful electric energy by means of ORC solution, as an example of improving the natural gas production and transportation processes efficiency. INTRODUCTION Recovering surplus heat and converting it into mechanical or electric energy is a viable and effective way to enhance the efficiency of industrial processes, therefore complying with possible environmental restrictions and obtaining a "greener" image while doing fruitful business. One of the most performing technology to recover surplus heat in industry is the Organic Rankine Cycle (ORC), a thermodynamic cycle that uses a high molecular mass fluid as working fluid and that is particularly suited to exploit from high to low grade heat sources, as it is the case of many industrial processes. In several energy-intensive industries, there are already many experiences in applying ORC technology to recover heat: the Oil&Gas sector has the potential to exploit more extensively the implementation of such ORC-based systems.

OnePetro

OMC

OMC-2017-553

Offshore Mediterranean Conference and Exhibition

air emission, application, climate change, compressor, configuration, consumption, Efficiency, electric energy, energy efficiency, gas turbine, heat recovery, heat source, orc unit, organic rankine cycle, organic rankine cycle technology, own consumption, rankine cycle, recovery system, Upstream Oil & Gas

Country: Asia (0.68)

Industry:

Energy > Oil & Gas > Upstream (1.00)
Energy > Renewable > Biofuel (0.93)

SPE Disciplines: Health, Safety, Environment & Sustainability > Environment > Air emissions (1.00)

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Research On Double Stage-Rankine Cycle For Ocean Thermal Energy Conversion Using Ammonia As Working Fluid

Ikegami, Yasuyuki (Institute of Ocean Energy, Saga University) | Morisaki, Takafumi (Institute of Ocean Energy, Saga University)

OnePetroJune, 2012

ABSTRACT The practical use of Ocean Thermal Energy Conversion (OTEC) is refocused because it is possible to supply stable electric power and a variety of integrated applications. This paper investigates on the thermal performance of Double Stage-Rankine cycle that has independent equipment respectively in two Rankine cycles. Turbine power and thermal efficiency of Double Stage-Rankine cycle is found to be larger than these of Single-Rankine cycle. Moreover, the maximum output power of Double Stage-Rankine cycle is found to be larger than both these of Single-Rankine cycle and Kalina cycle. INTRODUCTION In the new century, global warming and energy problem is becoming more critical. The practical use of Ocean Thermal Energy Conversion (OTEC) is refocused because it is possible to supply stable electric power and a variety of hybrid uses, such as the seawater desalination, house cooling and aquaculture, etc. The OTEC power plant is the system for generating electric power using temperature difference between warm surface seawater and cold deep seawater. Ocean thermal energy has a huge energy; however, energy density and temperature difference are small. OTEC system is smaller than that in the conventional thermal or nuclear power systems, and subsequently. The system cycle thermal efficiency is theoretically small. Therefore it is necessary to enhance the thermal efficiency of the OTEC system in order to use a practical plant. This paper investigates on the thermal performance of Double Stage-Rankine cycle that has independent equipment respectively in two Rankine cycles. The Double Stage- Rankine cycle was compared with the conventional Rankine cycle and Kalian cycle and has shown better performance in terms of maximum output power. The advantage of using two independent cycles is that it decreases irreversible losses in heat transfer equipment.

OnePetro

ISOPE

ISOPE-I-12-036

The Twenty-second International Offshore and Polar Engineering Conference

condenser, diagram, double stage-rankine cycle, equation, flow rate, Kalina cycle, mass flow rate, ocean energy, ocean thermal energy conversion, parametric performance analysis, rankine cycle, renewable energy, single-rankine cycle, temperature difference, thermal efficiency, turbine power, water temperature

Industry:

Energy > Renewable > Geothermal (1.00)
Energy > Renewable > Ocean Energy (0.90)

SPE Disciplines:

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Organic Rankine Cycle/Thermal Tower: Lower Cruise Ship Reverse Osmosis Costs

Leonhardt, Eric (Western Washington University) | Jeter, Don (Eagle Renewable Energy Engineering-LLC )

OnePetroSeptember, 2022

A novel combination of an Organic Rankine Cycle (ORC) and a hydration-dehydration Thermal Tower (TT) provides a potential source of pressurized water for a reverse osmosis (RO), desalination plant for a cruise ship. An analysis of the combined ORC-TT has been applied to a Wärtsilä 12V46F 14.4 MW diesel to provide an additional 560 kW shaft power and a source of evaporated seawater of 0.824 cubic meters per hour (0.229 kg/s). The water is available at 7 bar pressure at the bottom of a 70m Thermal Tower. The system features two separate ORC bottoming cycle turbines. The system uses a thermal heat exchange fluid to remove heat from the charge air cooler for the compressed air engine inlet, as well as the engine cooling liquid. Another exhaust-to-liquid cooler is used to remove energy from the exhaust downstream of the turbocharger. The heated fluid then passes through a high temperature ORC unit and a low temperature ORC unit. The high temperature ORC can generate up to 409 kW and the low temperature unit 155 kW. The remaining energy in the heat transfer fluid is used via a 70-meter hydration – dehydration Thermal Tower to heat seawater to evaporate water. The combined system offers additional shaft power while providing a source of desalinated water to reduce the load on reverse osmosis water purification systems.

OnePetro

doi: 10.5957/SMC-2022-077

SNAME

SNAME-SMC-2022-077

SNAME Maritime Convention

Houston, lower cruise ship smc 2022, ORC, organic rankine cycle, organic rankine cycle thermal tower, osmosis cost eric leonhardt, social responsibility, sustainability, sustainable development, thermal tower, water management

Country:

Europe (0.28)
North America > United States (0.17)

Industry:

Water & Waste Management > Water Management > Water Supplies & Services (1.00)
Transportation (1.00)
Energy (1.00)

SPE Disciplines:

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Research On Ocean Thermal Energy Conversion Using HFC245fa As Working Fluid

Morisaki, Takafumi (Institute of Ocean Energy, Saga University) | Ikegami, Yasuyuki (Institute of Ocean Energy, Saga University)

OnePetroJune, 2012

ABSTRACT Ocean Thermal Energy Conversion (OTEC) can supply stable electric power and a variety of integrated applications. This paper investigates on the thermal performance of Rankine cycle using HFC245fa as working fluid. Rankine cycle was compared among working fluids of different properties that are HFC245fa and ammonia and has shown same performance in terms of maximum output power. As the calculation results, because latent heat of ammonia is larger than that of HFC245fa, the working fluid flow rate at the maximum output power of Rankine cycle using ammonia was found to be less than that using HFC245fa. INTRODUCTION OTEC using the temperature difference between the warm surface seawater and the cold deep seawater can supply stable electric power and a variety of integrated applications, such as the seawater desalination, residential cooling and aquaculture, etc. In addition, effect of OTEC system on global warming and energy shortage problems seem promising. Oceans have a huge amount of stored thermal energy; however, energy density is low. As OTEC system operates under small temperature difference conditions, appropriate working fluid of low boiling point should be used in closed-cycle OTEC. HFC245fa has no harmful effect on the ozone layer and is expected to be utilized for Low-grade thermal energy conversion using low heat source temperature usually under 100oC, such as the solar thermal energy, hot spring water and waste heat, etc. This paper investigates on the thermal performance of Rankine cycle using HFC245fa as working fluid. Rankine cycle was compared among working fluids of different properties that are HFC245fa and ammonia and has shown same performance in terms of maximum output power. Moreover, Rankine cycle was compared with the kalian cycle using ammonia/water mixture as working fluid and has shown worse performance in terms of maximum output power.

OnePetro

ISOPE

ISOPE-I-12-037

The Twenty-second International Offshore and Polar Engineering Conference

ammonia water mixture, condenser, diagram, equation, evaporator, flow rate, hfc245fa, Kalina cycle, mass flow rate, ocean energy, r-rankine, rankine cycle, regenerator, renewable energy, temperature difference, thermal efficiency, turbine power

Industry: Energy > Renewable > Geothermal (1.00)

SPE Disciplines: Reservoir Description and Dynamics > Non-Traditional Resources > Geothermal resources (1.00)

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Performance Analysis of Ocean Geothermal Power Generation Cycle With Generator

Lee, Ho-Saeng (Deep Ocean Water Application Research Center, Korea Ocean Research & Development Institute) | Jung, Dong-Ho (Deep Ocean Water Application Research Center, Korea Ocean Research & Development Institute) | Moon, Deok-Soo (Deep Ocean Water Application Research Center, Korea Ocean Research & Development Institute) | Kim, Hyeon-Ju (Deep Ocean Water Application Research Center, Korea Ocean Research & Development Institute) | Nihous, Gerard C. (School of Ocean and Earth Science and Technology, University of Hawaii at Manoa)

OnePetroJune, 2011

ABSTRACT: The thermodynamic performance of geothermal power generation cycle with 1 kg/s geothermal water flow rate was evaluated to obtain the basic data for the optimal design of cycle. The basic thermodynamic model for cycle is Rankine cycle and the geothermal water and deep seawater was adapted for the heat source of evaporator and condenser, respectively. R-245fa is used as the working fluid. Cycle power showed the highest value when the evaporating pressure is around 47 oC under given conditions. The cycle efficiency and cycle power increased when generator is added with 0.9 generator effectiveness. According to the increase of geothermal water temperature and decrease of cooling water temperature, the cycle efficiency increased. Especially, the cycle power showed higher values when deep seawater below 5 oC is used as cooling water. INTRODUCTION Nowadays, even though industrialization due to the use of fossil fuels and the rapid development of technologies has significantly improved the quality of human lives, interests in new renewable energy that could be replaced for existing energy resources is increasing every day because of an energy crisis caused by depletion of usable fossil fuels and problems on the global environment. Geothermal heat, ocean energy, solar heat among such new renewal energy could generate electricity using temperature differences without separate combustion process (Baik, 2008). In particular, geothermal energy is one of the humankind's oldest energy resources, at present the usage is globally increased but in Korea the importance is relatively underestimated. Recently, geothermal heat is used for heating and cooling using heat pump, but it is also widely used for geothermal power generation in foreign countries. Currently, electricity generation through geothermal power generation is increasing in the world, and the Unites States, Philippine, Mexico, Italy, Indonesia, Japan etc. dominate this field (Eim, 2009).

OnePetro

ISOPE

ISOPE-I-11-539

The Twenty-first International Offshore and Polar Engineering Conference