air conditioning Articles
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Top Tips On Saving Energy When Using Air Conditioning
As temperatures seem to be gradually increasing each year, more and more homes are now having air conditioning units fitted in order to help keep the atmosphere comfortable throughout the year. However, these rely on electricity in order to run, and so they can have an impact on your utility bills. In this article, Chill Air Conditioning take a look at the best ways to save energy while using ...
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The future of air conditioning in the UK
Over recent years, air conditioning has become much more common in the UK. Even so, there is still concern about the environmental impact of traditional AC units. There is also the indisputable fact that they are currently very expensive to run. The AC industry is working to address both of these issues by leveraging ongoing technological advancements. The history of air conditioning in the UK ...
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RYDALL CC dissolves scale on A/C coils keeping students and staff cool case study
The air conditioning system at a school was experiencing problems when the normally cool spring temperatures increased to mid-summer levels. The coils on its air conditioning units were clogged with dust, dirt and other debris. RYDALL CC approach 4 gallons diluted (2:1), foamed onto coils and rinsed off with water. RYDALL CC results All of the pollutants were removed quickly and ...
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Walk-in refrigerators and freezers at a Prestigious hotel
The Mark Hopkins Hotel in San Francisco is one of the most prestigious hotels in the city. It takes pride in the care and comfort of its guests. The refrigeration systems keep food cold or frozen. These are critical components of the hotel’s food service and it is paramount that no system be taken out of service. With a view to becoming more energy efficient, the hotel engaged Power Knot ...
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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. http://www.ahrinet.org/ARI/util/showdoc.aspx?doc=703.As a result, for a handful of hot days, ...
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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 ...
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Study on the effect of preference of air–conditioning usage on the exergy consumption pattern within a built environment
According to previous work, preference is one major factor influencing occupants' behaviour. This paper aims at identifying the magnitude preference on the exergy consumption pattern within a built environment. The comparison is made between one group claiming to like sleeping in air–conditioned spaces and the other claiming to dislike it. In conclusion, the exergy analysis showed that at the ...
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Thermal comfort evaluation in Tehran metro using Relative Warmth Index
Underground railway systems, can generate heat from their operations to raise the temperatures of carriages and the station substantially. This may lead to passenger discomfort and complain especially in warm weather conditions that prevail in Tehran if underground environment is not cooled. Transportation air conditioning Committee of American Society of Heating, Refrigerating and ...
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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. ...
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Split Air to Air System at a City Library
The City of Mountain View is located in the San Francisco Bay Area and has a population of about 75,000 persons. The City has an aggressive goal to reduce its energy consumption. Realizing that the electricity used for air conditioning represents a large portion of its total electricity usage, the City engaged Power Knot to help reduce the consumption of energy. The City asked Power Knot to ...
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Redmayne Engineering Offices - Case Study
Project: Office Accommodation Client: Military Components Manufacturer Completed: 2008 Floor area: 130m2 Duration: 3 weeks Value: £95,000 Turnkey service elements completed: Design Building Regulation applications Planning applications and liaison Base preparation Manufacture off-site Delivery and installation Service connections Air conditioning installation Commissioning ...
By Modulek
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The experimental study of the effect of air conditioning system on internal noise within high speed train
With the increasing requirement for the travelling comfort of high speed train, the reduction in interior noise becomes very important. Noise source identification is a prerequisite to the decrease in the interior noise. To study the effects of air conditioning system on the noise inside the high speed train, the comprehensive measurement of noise and vibration was made for different carriages of ...
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Stannah Stairlifts - Case Study
Project: IT Office Accommodation Client: Stannah Stairlifts Completed: 2007 Floor area: 100m2 Location: Andover, Hampshire Duration: 10 weeks Value: £250,000 Turnkey service elements completed: Design Planning applications Building Regulation applications Base preparation Manufacture off-site Delivery and installation Service connections Air conditioning installation ...
By Modulek
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Ridgway School - Case Study
Project: Two Storey Senior School Client: Ridgeway School Completed: February 2013 Floor area: 512m² Duration: 5 weeks Value: £465,000 Turnkey service elements completed: Design Manufacture off-site Delivery Installation Air conditioning Commissioning and testing ‘The team did everything possible to facilitate an end result, tailored specifically to the budget ...
By Modulek
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Turbines Mericourt - France - Case study
The total job was a revision of turbine 1 of 2 of the waterpower plant in Mericourt, France, located at 50 km from Paris. For being able to work inside the housing, a scaffolding was built, including a platform. The work included gritblasting of the steel structure and housing, air conditioning, lighting and removing of all grit blasting material. Year of treatment: 2012 - 2013 Location: Port ...
By Acotec NV
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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 ...
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Power estimation for air cooling and dehumidification using exergy analysis
This paper presents a theoretical analysis based on the second law of thermodynamics to estimate the minimum work required for air cooling and dehumidification. Isothermal dehumidification and sensible cooling processes can be combined to give an equivalent path capable of representing the conventional air conditioning process in hot and humid climates. Dehumidification is analysed as a ...
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Exergoeconomic optimisation of an air–conditioning rotary regenerator: effect of matrix thermal conductivity on its performance
The purpose of this paper is to demonstrate the importance of the use of exergoeconomic analysis in the optimisation of the geometry of a rotary regenerator. The optimum geometry of a rotary regenerator is determined using the unit cost of the exergy of the warm air delivered as the objective function. The running cost is determined using different unit costs for the pressure component of exergy, ...
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Exergoeconomic optimisation of an air-conditioning rotary regenerator: effect of matrix thermal conductivity on its performance
The purpose of this paper is to demonstrate the importance of the use of exergoeconomic analysis in the optimisation of the geometry of a rotary regenerator. The optimum geometry of a rotary regenerator is determined using the unit cost of the exergy of the warm air delivered as the objective function. The running cost is determined using different unit costs for the pressure component of exergy, ...
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Federal Agency: CRAC unit
The United States Social Security Administration (SSA) is an independent agency of the United States federal government that administers Social Security, a social insurance program consisting of retirement, disability, and survivors’ benefits. The agency has 10 regional offices (of which Richmond is one). In its Strategic Sustainability Plan, June 2010, the SSA set a greenhouse gas (GHG) ...
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