Liquid Nitrogen Plant for Semen Storage: A Complete Guide

The purpose of a liquid nitrogen plant for semen storage is to allow facilities to either manufacture or purchase the cryogenic fluid needed to maintain frozen reproductive materials. Facilities such as artificial insemination centers, livestock breeding organizations, veterinary laboratories and genetic resource banks can utilize specialized nitrogen production and storage systems to assist in supporting their operation. It should be noted that there are two distinct functions being performed by the production plant and the semen storage tank. Therefore, potential buyers need to assess factors including production capacity, liquid nitrogen quality, storage facilities available, reliability of source of supply, and overall safety when evaluating a complete system.

What Is a Liquid Nitrogen Plant for Semen Storage?

A facility that produces/supplies liquid nitrogen for use in cryogenic preservation is called a "liquid nitrogen plant." The plant can consist of many components such as: nitrogen production/generation; purification of the nitrogen; conversion of the purified nitrogen into a liquid state (liquefaction); storage of the liquefied nitrogen; and the transfer of the liquefied nitrogen from one location to another.

The plant provides the cryogenic liquid, which stores semen samples in separate storage containers with appropriate temperature controls.

How does a liquid nitrogen plant work?

Industrial nitrogen manufacturing usually starts by separating air into its components (nitrogen, oxygen, etc.). After separating nitrogen from the air, the system will then prepare it for distribution based on customer requirements. Finally, using a liquefaction process, the system produces liquid nitrogen.

The process will vary based upon the design of the plant and technology used. Not all nitrogen generators produce liquid nitrogen as an immediate product. Many times, there must be a separate liquefaction unit installed with its own support systems.

Buyers who intend to use a complete system for the purpose of storing semen need to make sure the system will be able to supply them with liquid nitrogen of acceptable quality, amount and frequency.

Who may need this type of system?

Potential users include:

l Artificial insemination centers handling livestock semen.

l Veterinary laboratories managing cryogenic biological samples.

l Cattle and other livestock breeding organizations.

l Genetic resource banks preserving reproductive material.

l Research facilities requiring a dependable liquid nitrogen supply.

The correct response is dependent upon the amount of product required. For example, a small business could choose to have their liquid nitrogen delivered, whereas a larger organization might explore creating its own source of liquid nitrogen.

How Does Liquid Nitrogen Support Semen Cryopreservation?

Liquid nitrogen provides for the extended preservation of properly prepared sperm through very low temperature storage. There are several factors that affect successful preservation such as: the way you prepare the sample, how well you control the freezing process, using appropriate containers and how you handle the samples.

Liquid nitrogen is able to boil at approximately -196 degrees Celsius under normal atmospheric conditions. While this provides a suitable environment for cryogenics, there will still be a need for validated laboratory practices.

What is the relationship between the plant and the semen storage tank?

The plant provides the source of liquid nitrogen. The storage tank maintains a proper environment for the samples.

The last part of the system configuration depends on the chosen technology and the requirements of the facility. Every single component in an install does not necessarily have to be its own independent entity.

Why Consider On-Site Liquid Nitrogen Production?

The use of on-site production could assist facilities with managing the availability of supplies and reduce their reliance upon the delivery of products from other locations. However, whether the use of on-site production will have any economic or operational benefits will depend on the quantity of products consumed, the price of energy, how often equipment is utilized, what type of maintenance is required and what options are available as backups.

Improve supply planning

Facilities that require a large amount of nitrogen may wish to have more control of when they receive it. A properly designed production system will allow for scheduled deliveries of nitrogen and less reliance upon the delivery schedule.

In addition to on-site manufacturing being able to potentially help prevent supply interruptions, there are other issues that could lead to disruption of on-site production. These would include but are not limited to equipment failure, routine maintenance, electrical outages, or process related problems that may negatively impact on-site production.

Evaluate long-term operating costs

Delivered Liquid Nitrogen entails purchasing, transporting, storing, and coordinating the delivery. On-Site Production has additional costs such as electrical, equipment investment, maintenance, and technical support.

A valid comparison will take into account the entire cost throughout the anticipated operation period.

Support larger or expanding facilities

As a semen bank grows, it will likely require more liquid nitrogen to support its expanding inventory. It may be time for you to evaluate your current production system if your shipping methods are no longer sufficient to meet your operational requirements.

The fact that there is a larger quantity of products being sold does not automatically mean that producing those products at the location where they will be used is cost-effective. Buyers need to evaluate whether their actual projected needs for products can be met by the facility's production capabilities.

When is delivered liquid nitrogen a better option?

Delivered supply might be appropriate for facilities that have either low or inconsistent demand. Also, if there is a reliable local supplier available who can provide adequate delivery times and emergency assistance, then delivered supply can be a good option.

Before deciding, compare the following:

l Average and peak liquid nitrogen demand.

l Local delivery availability.

l Expected equipment utilization.

l Electricity and maintenance costs.

l Backup supply arrangements.

l Available installation space and utilities.

What Equipment Does a Semen Storage Facility Need?

A total facility requires much more than a liquid nitrogen generating facility. A total facility must have appropriate liquid storage facilities, sampling containers, monitoring programs and trained staff.

The equipment needed for this process will be based upon how many samples you are processing, what kind of reproductive materials you are using and what your facility's operational guidelines are.

Production and supply equipment

In addition to being able to produce its own nitrogen gas, a user can also have a nitrogen supply system designed that will include components such as an on-site nitrogen production unit, an on-site nitrogen liquefaction unit, an on-site nitrogen purification component, a liquid nitrogen storage tank, and distribution piping.

Ask the supplier to list the items that will be part of the proposed package. Also, verify what utilities, installation work, and secondary systems require separate contracts.

Cryogenic storage equipment

Semen storage tanks are designed to store your samples, not generate the nitrogen needed for cooling. When choosing a tank, consider its sample configuration, usable capacity, accessibility needs, and proven performance.

The World Organization for Animal Health (WOAH) suggests that those storing animal semen use proper hygiene measures, only allow authorized personnel to enter the facility, and maintain detailed records of the amount of semen that enters, remains in, and leaves the facility.

Monitoring and inventory management

The facility must have a process in place to check the level of liquid nitrogen and determine when there is unusual usage. In addition, sample inventories must show the location of every sample within the facility.

Equipment to monitor could involve suitable levels indicators, alarms, and other forms of control. Requirements for monitoring will vary based upon how the system is installed, and the risk assessment of the organization.

How Do You Select the Right Liquid Nitrogen Plant?

Select a plant for its verified need for liquid nitrogen, product specification requirements, operational environment, and the total cost of ownership. Do not base your selection on only the nominal output of the equipment.

Step 1: Calculate liquid nitrogen demand

Estimate the facility's regular nitrogen use. This includes replacing used nitrogen (storage), transferring samples from the storage area to the lab, losing some nitrogen due to equipment operations, and potentially adding additional equipment in the future.

If you have access to real consumption data, use it. For new facilities, make a projection based upon the facility's expected inventory and planned operating practices.

Step 2: Confirm liquid production capacity

You must ask your supplier(s) what they anticipate will be the amount of liquid nitrogen produced by their equipment when it is operated in accordance with the specifications you provide.

Confirm whether the quoted capacity is for producing nitrogen gas or for producing actual liquid nitrogen. There is a difference between these two.

Also find out what effect ambient conditions, maintenance, and operating schedules can have on output.

Step 3: Verify product specifications

Please provide a written specification of your requirements for nitrogen purity and other relevant specifications for your application.

You cannot assume that each nitrogen production or liquefaction system will yield a liquid product that is acceptable for all applications. Each supplier must provide documentation regarding what the product specification is and what limitations exist with respect to its use.

Step 4: Review liquid storage capacity

The storage tank for liquids must be able to meet both the current operational demands and the projected refill schedules of the plant. Additionally, the capacity of the storage tank should be based on the impact that an unplanned shutdown would have upon the plant.

A storage vessel is not a replacement for a contingency plan. Facilities must determine how they will continue to provide the required amount of product when there are scheduled maintenance activities or unexpected system failures.

Step 5: Evaluate utilities and installation requirements

Confirm electrical power, cooling needs, ventilation, space to install equipment, access for maintenance and other utilities specific to your location.

Before you prepare the site, obtain the drawings that describe how to install the equipment and the documents containing information about the conditions under which it will operate.

Step 6: Compare lifecycle costs

Compare capital expenditures, electrical energy consumption, repair/maintenance costs, cost of replacement parts, staffing costs and cost of back-up power.

Provide the same data as the other suppliers have provided you. Be sure to include in writing how you calculated your costs.

How Can You Estimate Nitrogen Demand and Operating Costs?

A credible estimate begins with how much was consumed, and clearly distinguishes what could have been produced based on the ability to produce, versus how much was actually needed. Additionally, the estimate needs to take into account the cost of maintaining the availability of the system.

Use this checklist:

l Review historical liquid nitrogen consumption, if available.

l Estimate daily and monthly demand.

l Identify seasonal or operational peaks.

l Calculate the expected electricity and maintenance costs of on-site production.

l Include liquid storage and transfer requirements.

l Estimate the cost of backup deliveries during downtime.

l Compare the total expected cost with delivered nitrogen.

For an established delivery system of liquid nitrogen, the facility's existing invoice and refill history may be used as a beginning.

In order for you to estimate a new facility, please use the most conservative numbers possible and ask each of your equipment manufacturers to provide details on how they calculated those numbers. Do not assume that the maximum production advertised will always be delivered on a day-to-day basis no matter what.

Should you prioritize low energy consumption or higher output?

The optimal configuration will vary based upon the relationship between available production capacity and actual demand, as well as the performance of the system under its specified operational load. Neither metric can be used alone to determine the most effective configuration.

If a facility is too large, it can cause higher than needed expenditures on both initial investment and operational expenses. On the other hand, if a facility is too small, it will likely be difficult to satisfy customer requirements and/or retain enough inventory to handle fluctuations in business.

A supplier must clearly outline the differences between a system's capacity, how efficiently it operates, its redundancy level, and the amount of data that can be stored in it.

How Should a Semen Storage Facility Manage Liquid Nitrogen?

Establish written procedures for the replacement of nitrogen, identifying samples, monitoring storage conditions, and responding to emergencies. Consistent application of these procedures can help preserve sample integrity and enhance traceability.

Monitor storage conditions

Set a schedule for inspections that is based on the characteristics of each tank, how the tank will be used, and the facility's overall level of risk.

Record the amount of nitrogen present within the system, and investigate any unexplained changes in its concentration. For areas where alarms or monitoring devices have been installed, verify that these systems function as per the manufacturer's directions.

Maintain accurate sample records

Every sample must be identified by some type of reliable means, and each must be stored at a specific location that is documented. When samples are transferred from one place to another, withdrawn for testing, or moved to a different location, these actions must be documented.

WOAH guidelines additionally stress on the requirement of permanent identification of samples and accurate records of the samples stored. The WOAH guidelines indicate that only new liquid nitrogen is used to fill up or top up the cryogenic tanks in those semen storage facilities.

Prepare for supply interruptions

Create a written response plan in case of a production failure, loss of power, an unanticipated increase in nitrogen usage, or if there is an issue with the storage tanks.

Responsible personnel should be identified in the plan as well as emergency contacts, alternative sources of supplies and the proper way to protect your sample.

Wait until there is an interruption before identifying an alternative nitrogen source.

How Do You Maintain a Liquid Nitrogen Production System?

Preventative Maintenance (PM) protects your equipment's reliability while also helping you control your operational expenses. The right PM schedule for each piece of equipment is based on the equipment's design and what is stated as the manufacturer's required PM procedures.

Follow the manufacturer's maintenance schedule

Review the machinery as outlined in the manufacturer's schedule. Examine applicable parts of the system, control systems, connecting parts and other protection systems using the approved methods.

Apply maintenance instructions from another plant model only after checking for compatibility.

Monitor production performance

Document actual outputs, hours operated, energy used, and when maintenance occurred. Check your recorded data against what is stated as expected by the manufacturer of the item you are using.

Changes could signify that a qualified technician needs to inspect or make adjustments to the system.

Keep maintenance records

Document inspections, part replacements, repairs, and alterations to how you operate. This documentation provides insight into recurring issues and helps plan for future maintenance.

Confirm technical support arrangements

Before buying, find out if spare parts are available for order, if you can receive remote assistance when needed, whether technicians have been trained on your specific product, and what kind of service response times can be expected.

The importance of these details is even greater when a facility uses its own local production capabilities to produce the liquid nitrogen it requires.

What Safety Requirements Should You Consider?

Liquid nitrogen poses both cryogenic burning and oxygen-depleted environmental hazards. Equipment used within a production plant will also introduce specific dangers, therefore requiring written operating and maintenance procedures.

Assess all of the facility's installations (including but not limited to; production machinery, storage tanks, transport systems, and sampling equipment).

Key precautions include:

l Provide appropriate cryogenic gloves, eye protection, and protective clothing.

l Maintain suitable ventilation and assess oxygen-deficiency risks.

l Use equipment designed for cryogenic service.

l Train personnel in safe transfer and replenishment procedures.

l Restrict access to authorized staff.

l Establish emergency procedures for equipment failure and nitrogen release.

l Follow applicable regulations and manufacturer instructions.

Never place liquid nitrogen into a standard, sealed container. Due to evaporation, the internal pressure may increase significantly creating a hazardous situation.

Safety precautions at the site should be appropriate for the equipment design and location. Get assistance from an engineer or other professional with expertise in safety, as necessary.

How Do You Choose a Liquid Nitrogen Plant Supplier?

You should select a supplier who will provide you with written documentation regarding the capacity, specification, installation requirements and after-sales service for the proposed system. Written technical information is always better than general statements about how well the product performs.

Before purchasing, request:

l A complete equipment list and process description.

l Confirmed liquid nitrogen production capacity.

l Product purity specifications and verification methods.

l Energy consumption data and operating conditions.

l Storage vessel specifications.

l Installation and utility requirements.

l Maintenance schedules and spare parts information.

l Warranty terms and technical support details.

l Applicable certifications and compliance documentation.

How is bangwin gas equipment relevant?

The official website for bangwin gas equipment is https://www.bangwingas.com/. Customers looking into gas equipment will find that the company publishes information and can contact the company regarding products that may be useful for their project.

Availability of a specific liquid nitrogen plant, its production capability, its appropriateness for storing semen products, and its certification(s) must be verified through communication with the manufacturer. This article should not imply that the company has available to purchase any particular model of plant.

Provide your expected liquid nitrogen requirements, required product specifications, location of proposed installation, existing utilities, and anticipated back up supplies when contacting us for information.

The related website offered for this project, bangwingascylinder.com, is also available for review. Please make sure that all the products you've selected are appropriate for your specific needs; a gas cylinder and a liquid nitrogen production plant do not function in the same manner.

Frequently Asked Questions

l What is a liquid nitrogen plant for semen storage?

The process of creating and supplying liquid nitrogen for use in cryopreservation is called a "cryogenic preservation" system. The components of such systems depend on how they are designed, but typically include: nitrogen production, nitrogen liquefaction, liquid nitrogen storage, and liquid nitrogen transport.

l Can a nitrogen generator produce liquid nitrogen directly?

A nitrogen generator is capable of producing nitrogen in the form of a gas. However, if you are looking to create liquid nitrogen you will need to utilize an appropriate liquefaction method. It is important to determine if your suggested system is designed to provide you with either nitrogen gas, liquid nitrogen, or both.

l Why do semen storage facilities need liquid nitrogen?

Liquid nitrogen provides the temperature for cryopreservation of appropriately processed sperm. It is necessary for facilities to have a reliable source of liquid nitrogen so that they can continue to store their samples under proper storage conditions and prevent damage to their reproductive samples.

l How do I calculate the capacity of a liquid nitrogen plant?

The process will be to determine what the daily and monthly consumption will be, what the peak demand is expected to be, how much storage needs to be replenished, and what the potential for growth/expansion may be. Those results should then be compared to the actual liquid production output documented in the operating plan.

l Is on-site liquid nitrogen production better than delivered supply?

The choice between these options will depend on factors such as: the amount of energy used (consumption); the cost of generating power (electricity); whether there is a way to deliver the energy (delivery); what kind of money needs to be invested in order to get started (capital investment); and how much money is required to keep the system running (maintenance). Therefore, prior to making a decision on which option to pursue, it is important to evaluate the total operating costs of each option and also assess the degree to which each can guarantee a continuous flow of power (supply reliability).

l What purity should liquid nitrogen have for semen storage?

The specifications needed for the proposed usage must be determined prior to purchasing the product from the vendor and then confirmed by the vendor and any applicable laboratory testing. Do not believe that all nitrogen-producing systems produce a liquid form of nitrogen.

l What is the difference between a liquid nitrogen plant and a storage tank?

A liquid nitrogen plant is used to produce or prepare the liquid nitrogen. A storage tank can hold liquid nitrogen or, in another type of cryogenic container, can store semen samples in appropriate conditions.

l What safety precautions are necessary for liquid nitrogen plants?

Facilities should provide proper ventilation, protective clothing for cryogenic applications, proper methods of transporting cryogens, qualified personnel, and a plan to respond to an emergency situation. The specific actions taken are based upon the facility's equipment design and a site-specific risk assessment.

l How can I reduce liquid nitrogen operating costs?

Monitor what you consume, evaluate how much it costs to create and ship products, make sure your machines are maintained on a regular basis, and build your facility so that it is the right size for the amount of product people will buy. Add up the cost of electricity, maintenance, storage, and back-up power when determining how much to charge for products.

l What information should I provide when requesting a quotation?

Liquid nitrogen requirements (estimated), required product specifications, operational hours, site utilities, storage requirements, intended installation location, and future expansion plans will assist suppliers in determining an appropriate configuration.

Conclusion

A liquid nitrogen plant used for the storage of semen is capable of meeting the need for supplies of artificial insemination centers, veterinary labs, livestock breeding associations, and genetic resources banks. But choosing the most appropriate system for your needs goes beyond simply comparing their output capacity.

Begin with an estimate of how much actual liquid nitrogen you will need. Once you know that, verify the type of production technology you intend to use, the amount of liquid nitrogen produced, what is expected of the final product, the capacity of the storage facilities, and any additional utilities required. After verifying those items, assess the operational expenses associated with using the system; identify the level of maintenance support available; evaluate safety procedures; and determine if there are backup options for providing liquid nitrogen.

Most importantly, make sure you differentiate among nitrogen generating equipment, liquefaction equipment, liquid storage containers, and semen storage containers. All of these components perform different functions for the entire system.

For project-specific data, contact bangwin gas equipment to ask for details of the type of equipment you will need for your project. Before you make a purchase, verify that the equipment is in stock, meets all of the specifications you require and is suitable for your purpose.