air conditioning Articles

  • Volvo dealer in Sweden compares air quality indoor and outdoor - Case Study

    Two AQMesh pods were used to measure NO, NO2, O3 and CO during May and June 2017 at the largest combined Volvo, Ford and Renault car dealer in Stockholm, Sweden, located on the highway between Stockholm city centre and Arlanda airport. The objective was to measure the air quality outside and inside the combined showroom and workshop, demonstrating the importance of measuring common ...


    By AQMesh

  • Europe imagines the ‘Port of the Future’

    On October 11-13 Envirosuite’s General Manager for Europe, Chaim Kolominskas, travelled to Amsterdam to present to the 2017 GreenPort Congress as part of a session on the Port of the Future. The GreenPort Congress is the largest conference focussed on balancing operational efficiency and environmental sustainability at ports. ...


    By Envirosuite

  • 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

  • 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

  • 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

  • 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. ...

  • 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

  • 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

  • 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

  • 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

  • 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

  • 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

  • COPs, EERs, and SEERs How efficient is your air conditioning system?

    Introduction This note discusses performances of air conditioning systems, including heat pumps and chillers. It describes the efficiencies of systems so you can estimate how much energy a system may use. The discussion applies equally to residential, commercial, and industrial systems. When we talk about the size of an air conditioning system (whether by tons of cooling, BTU/h, ...


    By Power Knot LLC

  • Smart operation of air-conditioning (A/C) and lighting systems for national load management

    In the countries of Arabian Peninsula, demand for electric power, primarily controlled by the air-conditioning (A/C) and generally peaking at 15:00 h, is currently growing well over 5% annually. Adaptations of smart operation of A/C and lighting systems in government and institutional buildings that commonly function between 07:00 h and 14:00 h has been evaluated as a technique for national load ...


    By Inderscience Publishers

  • The seasonal variation of urban air quality in northern European conditions

    Meteorological conditions in northern Europe vary widely with the seasons. Consequently, the seasonal variation of urban air pollution is, to a large extent, determined by those meteorological variables which are important for air quality. We present first results on the yearly variation of atmospheric stability (and the occurrence of inversion layers), wind velocity, ambient temperature, solar ...


    By Inderscience Publishers

  • From air conditioning to urban planning, defaults and standards create dysfunction by design

    How can we stop outdated assumptions from forcing us to waste? Personal heaters are a summer survival tool for many office workers chilled to the bone by hyperactive ventilation systems — an act of self-defense against an epidemic of overcooling that is wasting energy and confounding comfort in not only offices but also large shops, schools and other buildings. An audit ...


    By Ensia

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