Category: mine2

23 Dec 2015

About MEEMCO Environment

 

MEEMCO Group Companies:

 

  • MEEMCO Engineering
  • MEEMCO Mine & Metals
  • MEEMCO Cement & Lime
  • MEEMCO Environment
  • MEEMCO Hospitality & Food Services

MEEMCO Environment as a critical division in MEEMCO Group is aimed to put the vast resources of knowledge & experience – our human capital – to work for our customers in the industries dealing with environmental issues. The management team consists of engineers, managers and directors of relevant industries in order to provide a one stop station for Middle Eastern industries and in specific Iran.

MEEMCO Environment has sister companies and partners in UAE, Oman, Jordan and Turkey. Founders of the company are experts with years of experience and loads of expertise in variety of engineering and management fields. The company main focus is to provide efficient and cost effective solutions including equipment and engineering management to the Middle Eastern heavy industry including energy, mine and metals and cement and down-stream industries.

MEEMCO Environment vision is to be the first point of contact and a reliable source in the Middle East for

  • Technical Supply Management
  • Project Management
  • Project development

in the following fields

  • Water & Waste Water Treatment
  • De-dusting & Gas Filtration
  • Waste Heat Recovery (WHR)
  • Renewable Energy Generation
  • Recycling & Incineration

MEEMCO Core Values

Customer Care/Focus: We believe that create value for the customer will create value for the company. So our services are independent of time and place. We have 24/7 stand by staff which provide effective solutions to clients problems through services of the greatest value, exceeding the customer’s expectation for quality and support. Our achievement on the response is customer delight which customers feel from positive interaction with our people and our solutions and services.

Quality: Provide high value and performance in our products, processes and services.

Sense of Urgency: Demonstrate high accuracy while speed up the processes. Our 24/7 services distinguish us from other companies.

Innovation: Challenge conventional wisdom, exploring new ideas and daring to be the first to create new value for the customer. We employ the brightest people and believe that each employee could make a difference.

Predictability: By adhering to project management and quality assurance standards.

Openness: Today, information is meant to move and it moves people as well. So we are fearless of collaboration and exchange of ideas and information throughout of ways which are clear, consistent and credible.

Integrity: Choose to stride with courage and character, trust, honesty, professionalism and ethical behavior that is never compromised. We believe

Teamwork: Is the heart of our company. We believe together everybody achieves more.

 

20 Dec 2015

ORC WHR & Power Generation

 

 

ORC WHR & Power Generation

MEEMCO Environment is the representative of the suppliers of (WHR) Waste Heat Recovery Systems integrating the best available (ORC) Organic Rankine Cycle technology into the kilns and furnaces of energy intensive industries.

The Organic Rankine cycle (ORC) is named for its use of an organic, high molecular mass fluid with a liquid-vapor phase change, or boiling point, occurring at a lower temperature than the water-steam phase change. The fluid allows Rankine cycle heat recovery from lower temperature sources such as biomass combustion, industrial waste heat, geothermal heat, solar ponds etc. The low-temperature heat is converted into useful work, that can itself be converted into electricity.

Working principle of the ORC

The working principle of the organic Rankine cycle is the same as that of the Rankine cycle: the working fluid is pumped to a boiler where it is evaporated, passed through an expansion device (turbine or other expander), and then through a condenser heat exchanger where it is finally re-condensed.

In the ideal cycle described by the engine’s theoretical model, the expansion is isentropic and the evaporation and condensation processes are isobaric.

In any real cycle, the presence of irreversibilities lowers the cycle efficiency. Those irreversibilities mainly occur:

  • During the expansion: Only a part of the energy recoverable from the pressure difference is transformed into useful work. The other part is converted into heat and is lost. The efficiency of the expander is defined by comparison with an isentropic expansion.
  • In the heat exchangers: The working fluid takes a long and sinuous path which ensures good heat exchange but causes pressure drops that lower the amount of power recoverable from the cycle. Likewise, the temperature difference between the heat source/sink and the working fluid generates energy destruction and reduces the cycle performance.

Applications for the ORC

The organic Rankine cycle technology has many possible applications, and counts more than 250 identified power plants worldwide.Among them, the most widespread and promising fields are the following:

Waste heat recovery

Waste heat recovery is one of the most important development fields for the organic Rankine cycle (ORC). It can be applied to heat and power plants (for example a small scale cogeneration plant on a domestic water heater), or to industrial and farming processes such as organic products fermentation, hot exhausts from ovens or furnaces (e.g. lime and cement kilns), flue-gas condensation, exhaust gases from vehicles, intercooling of a compressor, condenser of a power cycle, etc.

Biomass power plant

Biomass is available all over the world and can be used for the production of electricity on small to medium size scaled power plants. The problem of high specific investment costs for machinery such as steam boilers are overcome due to the low working pressures in ORC power plants. Another advantage is the long operational life of the machine due to the characteristics of the working fluid, that unlike steam is non eroding and non corroding for valve seats tubing and turbine blades. The ORC process also helps to overcome the relatively small amount of input fuel available in many regions because an efficient ORC power plant is possible for smaller sized plants.

Geothermal Plants

Geothermic heat sources vary in temperature from 50 to 350 °C. The ORC is therefore perfectly adapted for this kind of application. However, it is important to keep in mind that for low-temperature geothermal sources (typically less than 100 °C), the efficiency is very low and depends strongly on heat sink temperature (defined by the ambient temperature).

Solar thermal power

The organic Rankine cycle can be used in the solar parabolic trough technology in place of the usual steam Rankine cycle. The ORC allows power generation at lower capacities and with a lower collector temperature, and hence the possibility for low-cost, small scale decentralized CSP units.

For more details of advantages about this technology, please contact us.