Air Conditioning |  Geo Thermal Heat Pump Systems | Dehumidification | Eco-Cute
Computer Controls | Thermal Storage | Refrigeration Products | Hydro Cooling

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Norlock supplies and installs Air Conditioning,

Air Conditioning

Boilers, Furnaces, Dehumidification units and Thermal Storage units to name a few peripherals.

All sizes of H.V.A.C installations can be handled by Norlock Refrigeration & Controls from domestic to commercial and industrial installations.

Boiler Systems are regularly installed by the Norlock team, our staff include refrigeration technicians, certified plumbers, electricians, welders, gas fitters and computer programmers.

Cost effective Thermal Storage Systems reduce owner operating costs and allow for smaller chillers to be installed. By designing the system around 24 hour per day chiller operation, the size of chiller can be reduced by up to 50% compared to one sized for peak load conditions.

Improved System Efficiency

Thermal Storage Units provide low leaving glycol temperatures throughout the cooling period. The chiller can be located upstream and still maintain the desired building supply temperature. Therefore when operating higher glycol supply temperatures to pre-cool the glycol, the capacity of the chiller is increased. Also the efficiency of the chiller is increased.

Compatible with all chiller types The product is compatible with centrifugal, reciprocating and screw chillers. Units can be installed for new applications and also for renovation and retrofit projects, for example where building usage has changed, increasing the cooling load and for chillers using CFC’s that require replacement .

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Geo Thermal Heat Pump Systems

The consistent temperature (energy level) of the earth is a terrific place to pick up or expel heat energy.

Simplified, a heat pump system involves a loop of tubing running deep into the earth or through a large body of water. Energy carrying fluid (refrigerant in this case) is pumped through the loop absorbing energy or expelling excess energy. The fluid is then circulated through a conventional heat exchanger, circulating air is blown over the exchanger and is eventually distributed throughout the complex via regular air ducts.

Heating

In the heating mode, the water circulating in the earth loop is cooler than the ground or lake temperature. Heat is absorbed by the water utilizing a simple theory of physics called heat transfer. Energy is absorbed from the ground in the form of heat. The water returning from the ground loop is warmer than the water initially plumbed into it. The water returning from the ground is directed through a heat exchanger. In the heat exchanger, refrigerant absorbs the heat energy from the heated water . The water now leaves the heat exchanger at a colder temperature, and circulates through the earth loop to pick up more energy (heat).

Refrigerant gas which contains energy gained from the earth loop travels from the heat exchanger to a compressor. In the compressor the refrigerant temperature rises to 160 degrees. From the compressor, the super heated refrigerant travels to the heat exchanger. Here, the heat pump’s blower circulates air across the air coil, increasing the temperature of the air which is blown through the duct work to heat the building.

Cooling

In the cooling mode, the water circulating in the earth loop is warmer than the ground or lake temperature. Heat is expelled by the water. Energy is expelled from the ground in the form of heat. The water returning from the ground loop is cooler than the water initially plumbed into it. The water returning from the ground is directed through a heat exchanger. In the heat exchanger, refrigerant absorbs the heat energy from the water. The water now leaves the heat exchanger at a warmer temperature, and circulates through the earth loop to release heat to the ground or lake.

The refrigerant, which has released its heat energy, and has become a cold liquid, now travels to the air / heat exchanger. Here, the heat pump’s blower circulates warm humid air across the cold air coil. As the air blows across the air coil, the air is cooled and distributed via the duct work throughout the building.

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Dehumidification

PERFORMANCE

SuperAdd, the desiccant-based air conditioning system, has demonstrated its benefits at numerous installations through- out the country. By providing conditioned air at lower humidity levels, owners are saving energy while establishing a more comfortable conditioned environment for customers. By adding a SuperAdd unit to your existing H.V.A.C. you can increase overall system performance and improve conditions in either your present space or in an expanded area. Three SuperAdd models are available to properly match the equipment capacity your building requires with simple installation-the SuperAdd unit is ducted in parallel with the existing return air ductwork.

SuperAdd eliminates the latent load that your air conditioning equipment would normally have to handle. With the new fresh air codes, this may be a substantial part of your air conditioning loads. How is this possible? A Honeycombe desiccant wheel rotates continuously between two counterflow air streams separated by flexible seals. These air streams flow through the dehumidifying and reactivation sectors of the desiccant wheel. The dehumidifying or process air stream is made up of outside and return air . This blend passes through the wheel and gives up its moisture content to the desiccant. Reactivation air is heated and passed through the desiccant wheel to drive off the moisture picked up from the process airstream.

BENEFITS

1) Eliminates the latent load your existing H.V.A.C. normally handles, eliminating costly subcooling and reheating of supply air.
2) Increases the amount of ventilation air in buildings as now required by ASHRAE Standard 62-89 and revised building codes, improving building IAQ,
3) Saves money by decreasing the overall operating time of existing air conditioning equipment due to lower latent loads.
4) Uses natural gas as an energy source for the dehumidifier to remove latent loads, which is less costly than using electrical energy for mechanical refrigeration.
5) May result in a 50% reduction in fan brake horsepower when a supply air volume of .5 scfm per square ft. of space can be maintained, as compared to 1 scfm per square ft. with a conventional system.
6) Ducts in parallel with the main return air duct to easily connect with the present system.

EXPANSION APPLICATION

When used in an expansion application, SuperAdd removes all the latent load from the conventional H.V.A.C. system and conditions the additional latent load from the expansion. This frees up enough sensible cooling capacity in the existing H.V.A.C. system to handle the total sensible cooling load. The desiccant dehumidification approach also means you are circulating less air per square foot, allowing you to slow down your existing supply fan.

CONSTRUCTION

The SuperAdd base is constructed of welded structural 12 gauge galvanized steel. The cabinet is constructed of .052 embossed aluminum panels and sealed water tight. All interior conditioned surfaces are insulated with at least 1″ fiber duct board.

OPERATION SEQUENCE

With the main circuit breaker turned on and the “Auto-off-Manual” switch at the electrical panel turned to the automatic position, the retrofit package is cycled by a humidistat in the controlled space. When the humidity in the area is above the setpoint, the dehumidifier drive motor , reactivation and process fans, and reactivation heat are activated. At this time, outside air and a portion of return air are dried and supplied to the conventional equipment. When the humidity level is satisfied in the spaces, the humidistat opens and the drive motor, fans, and reactivation heat are de-energized. At this point, all the return air and outside air are conditioned by the existing conventional equipment.

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Building Automation Services

Norlock Integrated Controlled Environment.

Integrated Controlled Environment means unsurpassed product quality while at the same time providing a cost effective system. The N.I.C.E computer control system is able to accurately calculate the deviation from a temperature set point and select just enough compressor capacity to recover without excess electrical consumption. Through proper programming the computer can determine which size of fan motor, brine pump, compressor or humidity system will be the most efficient for the present weather conditions and facility usage.

Computer programs can write graphs and trend logs of temperature, motor status, pressure, humidity, air quality, electrical consumption and run times. Trend logs can accurately track the operating requirements ensuring quality for both your business and your customers specific needs.

Whether it is your HVAC system, process control equipment, or your ice , we will maintain the precise temperature you require. Computer controls monitor and control your complete system ensuring optimal temperature, humidity and air quality.

Norlock is aDDC Authorized Dealer, a BCBC {British Columbia Buildings Corporation} approved direct digital system. DDC products come with an unsurpassed five year warranty. All aspects of building operations are controllable for example: temperature set back, lighting control and security just to name a few. With the ability to be monitored from a convenient location with a PC connection either locally, by phone or Internet Norlock is able to trouble shoot and help with its customers service needs.

Graphics Interface

Norlock has developed a Computer Controlled Refrigeration Graphics program to work in conjunction with DDCf. The graphics are embedded in a windows based program that allow a graphic representation of the refrigeration system and equipment. It provides a detailed, simple to understand pictorial representation of system controls with appropriate animation and displays. The PC based control interface is actually separate from the Central Controller guaranteeing any disruptions to the PC will not affect control of the Environmental Control System. This graphic display is easy to follow and understand, click on an image and all pertinent information about the associated component is displayed. Norlock will custom build a graphic operating system for each application ensuring easy operation and familiarity amongst maintenance staff members.

Imagine how easy it would be to operate a buildings HVAC system from any where when each room is clearly displayed on screen. Simply click the graphic representing a

particular room and adjust the temperature and lights, or preset the thermostat to heat the room an hour before it is occupied. With the use of a modem, or Internet Norlock can monitor and help troubleshoot their customer’s facilities and advise on their service needs. Historical data can be retrieved from trend logs to track all computer controlled operations for detailed analysis. With a computer system monitoring your plant or complex 24 hours a day, your facility will be better prepared to meet new requirements being introduced by Boiler and Pressure Branch Safety Programs for risk assessment and other Liabilities which are forever changing.

Energy Savings & Advanced Control

Lower energy costs can be achieved by centralizing a complex’s heating, cooling and lighting systems with time management programming; take advantage of discounted power during off peak hours.

Energy savings in an Ice Arena can be obtained by raising the temperature of the ice during unoccupied hours. This same technique can also be used for achieving specific ice conditions optimal for the different requirements such as hockey versus figure skating.

Advanced Control

Highly Accurate Infrared Sensors can be installed in any controlled environment. The use of multiple sensors allows the Refrigeration or Heating system to monitor and respond to temperature deviations in as many different areas in a room. Drafts and hot spots would be revealed upon review of the computer records, aiding in fine tuning a system.

A Motor Control Center (mcc)

Centralizes all motor starters in one location. Having the entire ice plant DDC (direct digital control) system connected in one location offers simplicity of expansion or quick repairs as well provides space saving.

The easy incorporation of DDC automation is a major consideration; many systems are totally automated using building DDC systems and industrial computers. This automation equipment can be incorporated into an MCC as part of the structure. Or, the entire MCC can be controlled and monitored by one twisted pair of wires running to the MCC in lieu of several sets of wires running to individual wall mounted components.

An obvious benefit of grouping all controls in one location is the convenience to visually monitor what is happening rather then having to search for a problem on different walls.

Norlock Refrigeration has installed Computer Controls in these high profile locations:

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Thermal Storage Units

Maximizing Efficiency

Cost Effective Thermal Storage Systems reduce owner operating costs and allow for smaller chillers to be installed. By designing the system around 24 hour per day chiller operation, the size of chiller can be reduced by up to 50% compared to one sized for peak load conditions.

Improved System Efficiency

Thermal Storage Units provide low leaving glycol temperatures throughout the cooling period. The chiller can be located upstream and still maintain the desired building supply temperature. Therefore when operating higher glycol supply temperatures to pre-cool the glycol, the capacity of the chiller is increased. Also the efficiency of the chiller is increased.

Broad Range of applications:

Compatible with all chiller types, this product is compatible with centrifugal, reciprocating and screw chillers. Units can be installed for new applications, renovation and retrofit projects; for example where building usage has changed, increasing the cooling load and for chillers using CFC’s that require replacement .

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HydroCooling

Hydrocooling Advantages:
1. Cools produce rapidly (about 15 times faster than air).
2. Allows for greater harvesting and marketing flexibility.
3. Easily handles large amounts of produce.

Most fresh fruits and vegetables require thorough cooling immediately after harvest in order to deliver the highest quality product to the consumer. Proper cooling delays the inevitable quality decline of produce and lengthens its shelf life. Most wholesale buyers now require that fresh produce items be properly and thoroughly cooled before they are shipped to market.

When warm produce is cooled directly by chilled water, the process is known as hydrocooling. Hydrocooling is an especially fast and effective way to cool produce. With modern technology, hydrocooling has now become a convenient and attractive method of post-harvest cooling on a large scale.

Many types of produce respond well to hydrocooling. Produce items that have a large volume in relationship to their surface area (such as apples, cherries, and peaches) and that are difficult to cool can be quickly and effectively hydrocooled. Unlike air cooling, no water is removed from the produce. In fact, slightly wilted produce may sometimes be revived by hydrocooling.

Types of Hydrocoolers

There are several different hydrocooler designs. Hydrocooling methods differ in their cooling rates and overall process efficiencies. In addition, hydrocoolers vary in the method of cooling that is used and the method of moving or placing the produce so that water comes in contact with it. Four types of hydrocoolers that are commonly used are discussed below: conventional, batch, immersion, and truck hydrocoolers. Conventional Hydrocooler A conventional hydrocooler allows the produce, either in bulk bins or in cartons, to pass along a conveyor under a shower of chilled water. Warm produce is placed on one end of the conveyor, and cooled produce is removed at the opposite end. The rate at which the conveyor, and thus the produce, is advanced through the shower is about 1 foot per minute and may be varied on most hydrocoolers to suit conditions.

Batch Hydrocooler

Batch hydrocoolers are enclosures that do not have conveyors. Palletized cartons or bulk bins of produce are loaded into the enclosure with a fork lift. The door of the enclosure is then closed, and large quantities of chilled water are flooded over the top of the produce, collected at the bottom, re-cooled, and recycled. Most batch hydrocoolers can cool only one pallet of produce at a time, as shown in Figure 2. However, some larger batch units are occasionally built that can cool as many as eight pallets at once. These hydrocoolers generally have a smaller capacity than conventional hydrocoolers and therefore may be less expensive. They are better suited to growers with a limited amount of produce that could not economically justify a larger unit.

Immersion Hydrocooler

Immersion hydrocoolers are large, shallow, rectangular tanks that hold moving chilled water. Crates or boxes of warm produce are loaded into one end of the tank and moved by a submerged conveyor to the other end where they are removed. Crushed ice or a vapor-compression refrigeration system keeps the water cold, and a pump keeps the water in motion. Most produce is only slightly buoyant so it tends to stay submerged. The length of time the produce remains in the water varies with the initial conditions and desired ending temperature.

Immersion hydrocooling is nearly twice as rapid as conventional hydrocooling methods. With conventional hydrocooling, the cold water that is sprayed or flooded over the produce contacts only a portion of its surface. The result is less than maximum heat transfer. Immersion hydrocooling reduces the temperature more rapidly because moving chilled water completely surrounds the exterior surface.

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Norlock offers a wide variety of refrigeration equipment.

Every system is designed to attain the  specific temperature required for the application.
Great care and forethought is exercised to perfectly match the condensing unit to the evaporator coil for reliable and efficient operation.

Norlock is concerned with the effects of CFC’s on our environment, our technicians are trained in the use of various refrigerants and the procedures required to meet environmental standards. After consultation with our component and refrigeration suppliers, Norlock then determines which refrigeration systems would be the safest, most practical, and cost efficient.

A partial list of the products Norlock sells, services and installs appears below: