![]() ![]() The LDD and MRD systems were found to be most cost-effective during the late fall, winter, and early spring, but their efficiency drops off if the outdoor air temperature is above 10C or is high in humidity. “All systems are able to control humidity much better than conventional ventilation, but each has their own advantages and disadvantages,” notes Han, adding that none of the systems were effective throughout the entire year. ![]() “By continuing the implementation of programs such as the Greenhouse Competitiveness and Innovation Initiative, we are furthering our investments with the greenhouse industry, finding ways to reduce their carbon footprint, and supporting farmers as stewards of our environment.”Īn Ontario flower greenhouse had three systems – MRD, LDD, and HRV – installed in the GRET project in 2018, an herb greenhouse had four LDD units installed, and a tomato greenhouse in Leamington had an ERV system installed.ĭespite some setbacks with malfunctioning units that couldn’t be fixed due to supply chain shortages and changes in crops and production strategies, the researchers were able to gather and analyze enough data to make some useful assessments about the technologies being tested. “Finding ways to reduce energy costs and increase efficiencies is a top priority for Ontario’s greenhouse growers,” says Ontario Minister of Agriculture, Food & Rural Affairs Lisa Thompson. Jingjing Han, Research Engineer with Flowers Canada (Ontario).īuilding on findings from that initial project, Flowers Canada was successful in receiving funding from the Greenhouse Competitiveness and Innovation Initiative (GCII) to conduct more in-depth research into the four technologies and get a better understanding of how they can integrate into existing greenhouse control systems. “We are looking for alternative ways to decrease energy consumption to both reduce grower costs and reduce fossil fuel use,” explains Dr. The fourth technology is an energy recovery ventilator (ERV) prototype that combines the liquid desiccant approach with heat exchange into a single system. This included a mechanical refrigeration dehumidifier (MRD), a liquid desiccant dehumidifier (LDD) that runs humid air past a brine solution to absorb the moisture and then heats the brine to regenerate it, and a heat recovery ventilation (HRV) system that is located outside the greenhouse and warms up the cool, dry air as it enters the facility. ![]() (Image courtesy of Flowers Canada).įlowers Canada (Ontario) set about to find a solution to this challenge, accessing funding through the Greenhouse Renewable Energy Technologies (GRET) Research & Development Initiative several years ago to test four different energy recovery technologies for their potential to reduce grower energy needs during the peak greenhouse use period of fall through early spring. Liquid desiccant dehumidifier installed inside a greenhouse. While effective, this strategy also causes heat loss, which can increase a farm’s energy costs. Left uncontrolled, humid air can reduce crop growth and result in poor-quality produce, so growers have traditionally resorted to ventilation to manage the issue. Statutory consumer guarantees also apply under Australian Consumer Law.High humidity levels inside greenhouses are a by-product of growing crops indoors. To file a claim or contact our friendly Customer Service staff at the Help Centre for further assistance. If your item develops a fault after delivery, we will assess your claim and offer a replacement, full refund or other remedy where appropriate.įor warranty details see our Terms and Conditionsįor details on change of mind including refunds and returns please see our Terms and Conditions. If your item arrives damaged we will arrange a replacement or full refund at our cost. This Change of Mind Policy does NOT apply to: Protectors, bath mats, quilts, underblankets, pillows and toppers (for health and hygiene reasons). Please note a refund does not include postage costs. If you change your mind or make an incorrect choice, we will give you a refund within 30 days of purchase for unused products (returned in its original packaging). So if something does go wrong, we are here to help you. ![]() At House, we are committed to offering you a safe and pleasant shopping experience. ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |