Andy Hamilton Commercial Director commented “It’s all in a days work, reacting fast and providing cost effective temporary Air Conditioning solutions is just what we are about. No matter how large or small we react fast and cool things down, especially in business critical areas such as server rooms where temperature control is a key critical issue”
CrossHire can bee found at www.crosshire.ie or direct contact on 0845 603 4135. CrossHire can provide a wide range of Air Conditioning and Process Cooling products including Portable Air Conditioners ranging from 14000BTU to 35000BTU all available using standard 13amp supply. For larger jobs their Portable MTA and Trane Chillers range from 20kW to 660kw

There are 4 principle types of Portable Air Conditioners available for Hire from CrossHire. Each environment requiring Portable Air Conditioning is different and therefore careful consideration needs to be made prior to choosing the best Air Conditioning Solution. CrossHire will be pleased to help, give advice and answer any questions regarding your Portable Air Conditioning needs. To help you choose you can Click Here to View our full selection ofPortable Air Conditioners.

The basic choice can be made from one of the following:

1. Evaporative coolers (swamp coolers)
2. Portable Exhaust tube Air Conditioning
3. Portable Split type Air Conditioning units (refrigerant)
4. Portable Split type Air Conditioning units (water cooled)

What should I consider before choosing a portable air conditioner?

The most important factor to consider the amount of cooling duty that is required for the area to be properly cooled. The amount of cooling duty required (measured in BTU or kW) will be impacted by several issues. i.e. size of area, number of people populating the area, numbers of items that generate heat e.g. PC, photocopiers, fax machines etc. Also the number of windows and the direction of the sun, i.e. buildings with south facing windows will require more cooling duty. Calculating the correct level of Air Conditioning duty required is important the correct decision can save hire costs and deliver the perfect cooling solution. To help you calculate the correct Air Conditioning duty for your environment please click here for the CrossHire Cooling

For a very quick guild the following can be used:

Different factors can reduce the effectiveness of portable air conditioners. Here are a few solutions that might increase or decrease BTU’s if you suspect the effectiveness of your portable air conditioner is going to be altered by an outside factor:

1. Reduce your required capacity by 10% if your room is heavily shaded.
2. Increase your capacity by 10% if your room is very sunny.
3. Add 600 BTU to your capacity for each additional person (beyond two people) that regularly occupies the same room.
4. Add 4,000 BTU if the room is a hotter than normal environment i.e. similar to a kitchen.

After deciding on the BTU/kW rating you need, the next issue to sort out is what type of Portable Air Conditioner to choose.

Portable Air Conditioners

The type of Portable Air Conditioner you choose may depend greatly on where you intend to exhaust it. Exhaust tube Air Conditioners remove the heat produced by the refrigeration circuit via exhaust tubes. Ideally the exhaust tube is Directed out of an adjacent window, however in some circumstances the heat can be removed via a suitable ceiling void or into other unused space. Each model and size of Exhaust Tube Air Conditioner is capable of different performance. For example with the following models available from CrossHire the exhaust tube can be extended to a maximum of 1.8 meters from the air conditioning unit:

Portable air conditioner model – Coolair 14 = 2.5 meters

The Coolair 14 is a very popular portable Air conditioner. Small and compact, this model unit has a smart modern look and is very easy to install and use, despite its size it produces a very powerful 4.1kW (14000 BTU) of portable air-conditioning, it also has a fully automatic thermostat and comes complete with a remote control.

Portable air conditioner model – Coolair 15 = 2.5 meters

The Coolair 15 is a very popular portable Air conditioner; it is slightly more powerful than its sister the Coolair 14 producing a credible 4.4 kW (15000BTU) of cooling. Small and compact, this model unit has a smart modern look and is very easy to install and use. It has a fully automatic thermostat and comes complete with a remote control. In more sophisticated models with high powered fans the exhaust tube can be extended longer for example:

Portable air conditioner model – Coolbreeze 15E = 5 meters

The Coolbreeze 15E portable air conditioner delivers 4.4kW (15000BTU) of cooling power, it is a very efficient and extremely well built portable air conditioning unit. It is easy to use, robust and portable unit capable of producing large volumes of cool air.

Portable air conditioner model – Coolbreeze 20E = 10 maters

The Coolbreeze 20E portable air conditioner delivers 5.9kW (20000BTU) of cooling power, it is a very efficient and extremely well built portable air conditioning unit. It is easy to use, robust and portable unit capable of producing large volumes of cool air.

Portable air conditioner model – Coolbreeze 27E = 10 meters

The Coolbreeze 27E portable air conditioner delivers 7.9kW (27000BTU) of cooling power, it is a very efficient and extremely well built portable air conditioning unit. It is easy to use, robust and portable unit capable of producing large volumes of cool air.

Portable air conditioner model – Coolbreeze 35E = 10 meters

The Coolbreeze 35E portable air conditioner delivers 10.25kW (35000BTU) of cooling power. Probably the most powerful unit that works reliably off a 13AMP UK circuit. It is a very efficient and extremely well built portable air conditioning unit. It is easy to use, robust and portable unit capable of producing large volumes of cool air. Due to its immense air moving system the unit is capable of working and cooling at almost any remote location – making it probably the most versatile unit currently available in the U.K.

Split type Air Conditioning units are connected to external heat exchange units; these outdoor units remove the heat produced by the indoor refrigeration circuit. CrossHire only use the highest quality water cooled split units enabling the indoor Air Conditioning unit to be separated fro the external Heat Exchange unit by up to 30 meters:

Portable air conditioner model – Cool Breeze 15P

The Coolbreeze 15P portable air conditioner delivers a powerful 4.4kW (15000BTU) of cooling power. This unit is very efficient water – cooled ‘Split’ portable air conditioner. There are two parts to this model, the room unit and the external condenser unit. The two units are connected by a flexible hose. By connecting to multiple hoses the smaller condenser unit can be placed up to 30 meters from the room unit.

Portable air conditioner model – Cool Breeze 22P

The Coolbreeze 22P portable air conditioning unit delivers a huge 6.5kW (22000 BTU) of cooling power. This is a larger and more powerful water cooled ‘Split’ portable air conditioning system. There are two parts to the system, the room unit and the external condenser unit; the two are connected by a flexible hose. The smaller condenser unit can be placed up to 30 meters from the room unit.

Portable air conditioner model – Cool Breeze 25P

Combining a quiet & powerful room cooling unit, with a remote condenser capable of operating up to 35 metres distance, the Cool breeze 25P provides the user with 25,000 BTU’s (7.3kW) of cooling to be positioned exactly where needed. Easy to connect and extend, small diameter non-leak water-filled flexible line connections, allow this unit to operate as installed air conditioning, giving highly efficient room cooling.

Evaporative coolers

Evaporative coolers (also called swamp, desert, or air coolers) are devices that cool air through the simple evaporation of water. They differ from refrigeration or absorption air conditioning, which use the vapor-compression or absorption refrigeration cycles. In the United States, small-scale evaporative coolers are called swamp coolers by some users due to the humid air conditions produced. The name sump cooler is also used. Air washers and wet cooling towers utilize the same principles as evaporative coolers, but are optimized for purposes other than air cooling.

Evaporative cooling is especially well suited for climates where the air is hot and humidity is low. For example, in the United States, the western/mountain states are good locations, with swamp coolers very prevalent in cities like Denver, Salt Lake City, Albuquerque, El Paso and Phoenix, where sufficient water is available. Evaporative air conditioning is also popular and well suited to the southern (temperate) part of Australia. In dry climates, the installation and operating cost of an evaporative cooler can be much lower than refrigerate air conditioning, often by 80% or so. But evaporative cooling and vapor-compression air conditioning are sometimes used in combination to yield optimal performance. Some evaporative coolers may also serve as humidifiers in the heating season.

In moderate humidity locations there are many cost-effective uses for evaporative cooling, in addition to their widespread use in dry climates. For example, industrial plants, commercial kitchens, laundries, dry cleaners, greenhouses, spot cooling (loading docks, warehouses, factories, construction sites, athletic events, workshops, garages, and kennels) and confinement farming (poultry ranches, hog, and dairy) all often employ evaporative cooling. In highly humid climates, evaporative cooling may have little thermal comfort benefit beyond the increased ventilation and air movement it provides.

Portable Evaporative Cooler model – Commander 3000

Combining the ultimate in elegance with superior performance, the Commander 3000 features an exceptionally powerful fan, a motorised rotating grille for even airflow and a healthy natural cooling system. It is the perfect solution for cooling every corner of a large open room.

Portable Evaporative Cooler model – Breezair

The mobile Breezair cooler will bring benefit to a large number of industries including factories, warehouses, mezzanine floors, sports centres, fitness centres, shops, showrooms, conference rooms and temporary tents and marquees to name but a few. Often it will not be necessary to cool a large building completely but it might be a requirement just to cool a specific area or process or a group of people. The mobile cooler is ideal for this purpose. It can be simply wheeled into position and is ready to use almost immediately.

You can calculate the air-conditioning duty for your requirements on the CrossHire.
However the team at CrossHire will guide you through and advise on the best models for you,
simply call 0845 603 4135

The chillers for industrial applications can be centralized, where each chiller serves multiple cooling needs, or decentralized where each application or machine has its own chiller. Each approach has its advantages. It is also possible to have a combination of both central and decentral chillers, especially if the cooling requirements are the same for some applications or points of use, but not all.

Decentral chillers are usually small in size (cooling capacity), usually from 0.2 tons to 10 tons. Central chillers generally have capacities ranging from ten tons to hundreds or thousands of tons.

The chillers for industrial applications can be centralized, where each chiller serves multiple cooling needs, or decentralized where each application or machine has its own chiller. Each approach has its advantages. It is also possible to have a combination of both central and decentral chillers, especially if the cooling requirements are the same for some applications or points of use, but not all.

Decentral chillers are usually small in size (cooling capacity), usually from 0.2 tons to 10 tons. Central chillers generally have capacities ranging from ten tons to hundreds or thousands of tons.

Fully Chilled water is used to cool and dehumidify air in mid- to large-size commercial, industrial, and institutional (CII) facilities. Most chillers are designed for indoor operation, but a few are weather-resistant. Chillers are precision machines that are very expensive to purchase and operate, so great care is needed in their selection and maintenance. Engineers are normally retained to evaluate applications’ cooling needs, and to specify the optimal machines.

The gas cycle is less efficient than the vapor compression cycle because the gas cycle works on the reverse Brayton cycle instead of the reverse Rankine cycle. As such the working fluid does not receive and reject heat at constant temperature. In the gas cycle, the refrigeration effect is equal to the product of the specific heat of the gas and the rise in temperature of the gas in the low temperature side. Therefore, for the same cooling load, a gas refrigeration cycle will require a large mass flow rate and would be bulky.

Because of their lower efficiency and larger bulk, air cycle coolers are not often used nowadays in terrestrial cooling devices. The air cycle machine is very common, however, on gas turbine-powered ‘jet’ aircraft because compressed air is readily available from the engines’ compressor sections. These jet aircraft’s cooling and ventilation units also serve the purpose of pressurizing the aircraft.

In the early years of the twentieth century, the vapor absorption cycle using water-ammonia systems was popular and widely used but, after the development of the vapor compression cycle, it lost much of its importance because of its low coefficient of performance (about one fifth of that of the vapor compression cycle). Nowadays, the vapor absorption cycle is used only where waste heat is available, where heat is derived from solar collectors, or electricity is unavailable.

The absorption cycle is similar to the compression cycle, except for the method of raising the pressure of the refrigerant vapor. In the absorption system, the compressor is replaced by an absorber which dissolves the refrigerant in a suitable liquid, a liquid pump which raises the pressure and a generator which, on heat addition, drives off the refrigerant vapor from the high-pressure liquid. Some work is required by the liquid pump but, for a given quantity of refrigerant, it is much smaller than needed by the compressor in the vapor compression cycle. In an absorption refrigerator, a suitable combination of refrigerant and absorbent is used. The most common combinations are ammonia (refrigerant) and water (absorbent), and water (refrigerant) and lithium bromide(absorbent).