air conditioning Articles

  • Aeration and Mixing Bring Hussain Sagar Lake`s Ecosystem Back to Life

    Overview Hussain Sagar Lake in India faced an inflow of untreated waste and pollution causing decreasing DO levels and foul odors in the nearby community. An even more critical threat was eutrophication, or an excessive number of nutrients in the body of water, choking out the natural aquatic life. Given the lake is stagnate, circulation and the distribution of efficient aeration ...

  • Insitu analysis of ammonia slip and water vapor using a tunable diode laser for SCR/SNCR optimization and boiler tube surveillance in power plants

    ABSTRACT Environmental Regulations driven by the 1990 Clean Air Act require Power Plants to reduce NOx emissions. SCR's and SNCR's reduce NOx emission by injecting ammonia into the combustion flue gas. which ideally reacts with the NOx to form H?0 and Nj. The efficiency of the SCR SNCR is determined by monitoring the outlet for excess NH3. referred to as NH3 slip. The flue gas sample ...

  • Taking advantage of production waste - Case Study

    Recycling areas: Various scrap Company name: KME (Serravalle Copper Tubes) Located: Serravalle Scrivia (Alessandria), Italy Founded: 1886 Employees: 5700 KME is a leading global fabricator of copper and copper alloy semi-finished products. Each year 405.000 tons of copper and copper alloy semi-finished products (excluding copper wire) are produced. ...


    By Eldan Recycling A/S

  • Air Conditioning That`s Out of This World

    New materials enhance the cooling effects from outer space to reduce energy use in small- to medium-sized buildings Reducing air conditioning energy use by using new materials to enhance the cooling effects from outer space may not be such a far-out idea. In a simulation study using DOE's Energy Plus software and ...


    By US Department of Energy

  • Energy Saving in Air Conditioning is a must!

    Energy Efficiency is now a must! Air Conditioning in residential and commercial buildings is the largest single consumer of electricity so tenants and owners are now looking for ways to reduce their air conditioning energy costs. EnviroTech, a company based in the UAE, Oman, KSA and South America with all products Made in England, is ...


    By EnviroTech Limited

  • Valves in Water System of Heating Air Condition

    Common valves in water system of heating air condition include gate valve, globe valve and butterfly valve.   Gate vale For its moderate length, rotary adjusting rod and good regulating performance, gate valve is widely utilized in large caliber pipes.   Globe valve Globe valve is suitable for small caliber pipes for its long length, ...

  • Effects of meteorological conditions on concentration of air pollutants in Delhi

    Air pollution in Delhi is a serious environmental problem. In this paper, the effects of meteorological conditions on local air quality are quantitatively assessed by determining the relationships between concentrations of Suspended Particulate Matter (SPM), Respirable Suspended Particulate Matter (RSPM), sulphur dioxide (SO2) and nitrogen dioxide (NO2) with meteorological parameters on monthly ...


    By Inderscience Publishers

  • Daytime ventilation conditions in Buenos Aires city, Argentina

    From routinely available observational data, the daytime ventilation conditions in Buenos Aires city have been studied. The climatological behaviour was analysed. The study included the effects of local conditions, such as the coastal location, the urban features and the influence of air humidity on the characteristic parameters of the dispersive capability of the atmosphere. The frequencies of ...


    By Inderscience Publishers

  • Thermal comfort study of air-conditioned university laboratories

    In tertiary education institutions, good indoor air quality (IAQ) provides a conducive environment for teaching and learning activities. A field study on the environmental conditions and occupants’ comfort was carried out in six laboratories at Universiti Sains Malaysia. The study evaluates the current thermal comfort conditions using objective measurement and subjective assessment. The measured ...


    By Inderscience Publishers

  • What`s cool about air conditioning

    Conservationists often mock Americans for their love affair with the car. But the air conditioner appears to be a growing rival for our affection. Twenty years ago only about one-quarter of US residences had central air conditioning; by 2005 it was up to 62%, according to the United States Census Bureau. ...

  • Healthy conditions in training centre

    The challenge CENFIM’s objective is to educate highly qualified and specialised employees for the metallurgical industry in Portugal. They organise courses of various durations and at various levels. The Portuguese metal industry counts approx. 19,000 companies, employing a total of 190,000 people. In the ...


    By Plymovent Group BV

  • Exergy analysis of advanced transcritical CO2 air conditioning cycles

    The energy and exergy balance methods were performed on two advanced transcritical CO2 air conditioning cycles presented in the literature. In addition to the basic transcritical CO2 air conditioning cycle which has five main components, compressor, gas cooler, evaporator, expansion valve and internal heat exchanger, two advanced cycles are investigated; both have two-stage compressor (low stage ...


    By Inderscience Publishers

  • Technical and economic analysis of a solar–assisted air–conditioning system

    This paper presents analysis aiming at assessing the feasibility and economic performance of a solar–assisted air–conditioning system for a middle class house under the climatic conditions of Tunis City. Two alternative cooling modes for the single effect water–lithium bromide absorption machine are considered, a water–cooling in association with a cooling tower and ...


    By Inderscience Publishers

  • A life cycle greenhouse gas assessment of remanufactured refrigeration and air conditioning compressors

    Remanufacturing can importantly reduce the resource intensity and increase the eco-efficiency of product systems by utilising recovered end of life (EOL) parts. A life cycle assessment (LCA) has been carried out to determine the greenhouse gas emissions from the production of a remanufactured compressor vs. a new original equipment manufacturer (OEM) compressor. The remanufacturing consisted of ...


    By Inderscience Publishers

  • Performance evaluation of multi-passive solar applications of a non air-conditioned building

    This paper describes the performance evaluation of solar passive cooling techniques such as solar shading insulation of building components and air exchange rate. Thermal performance of the non air-conditioned building is predicted by analysing a one-dimensional numerical model. Numerical calculation has been made corresponding to three different climates, viz. composite, hot and dry and warm and ...


    By Inderscience Publishers

  • Exergetic performance of a cylindrical methane–air microcombustor under various inlet conditions

    The entropy generation analysis is performed on a methane–air cylindrical microcombustor. The combustor is studied under different fuel–air equivalence ratios and two different inlet velocities. The results reveal that entropy generation due to heat transfer has the highest contribution to the total exergy destruction. Besides, the chemical and mixing entropy generations have the next greatest ...


    By Inderscience Publishers

  • Model and experimental analysis of the dynamic behaviour of air conditioning plant pipelines

    This paper presents a model to describe the transmission of vibrations through the pipelines of automotive air conditioning plants. It is known that vibration propagating from the compressor to the other system components can affect both acoustical and structural behaviour. In this study a frequency domain description is purposed, using a transfer matrix formulation to study the pipe dynamics. ...


    By Inderscience Publishers

  • How conditions affect cookies and air pollution control solutions

    Chocolate chip cookies are one of my favorite treats. Butter, sugar, eggs, flour, vanilla, and, of course, chocolate chips. Combine the ingredients together and you get a delicious cookie. Somehow, using the same ingredients the cookies do not always turn out the same. Sometimes they are thinner and crispier. Other times, they are soft and chewy. After watching cooking shows, I have come to ...

  • Policy influence of formaldehyde exposure risk in air-conditioned office environment

    Long-term measurement of indoor air quality (IAQ) over a general community could be a good approach to evaluate the influence of policy on pollutant exposure levels. However, this approach requires considerable measurement efforts and in many circumstances an updated data set will not be available. Formaldehyde is an indoor pollutant that presents a health hazard to building occupants in the long ...


    By SAGE Publications

  • Self–tuning fuzzy PID decoupling controller for VAV air–conditioning system

    One of the most important challenges in nonlinear, multi–input and multi–output (MIMO) and time variant systems is designing a controller with acceptable performance. This paper focuses on design a new adaptive fuzzy PID decoupling controller, applied in the VAV air–conditioning system. In this approach, the PID parameters are adjusted by fuzzy rules. Diagonal matrix decoupling method is employed ...


    By Inderscience Publishers

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