Frequently Asked Questions
Q: What is a MultiGen System? A: The MultiGen System is a unique blend of proven reliable technologies capable of supplying power and free cooling for a variety of uses such as; generating water from the atmosphere, refrigeration or cool air-conditioned air… all generated free from waste exhaust gas heat.
Q: How versatile is a MultiGen System and what does it produce? A: The MultiGen System is very versatile and the system components can be configured in many different ways. The skid mounted or containerized MultiGen System has a small equipment footprint and is low maintenance. It can be scaled in multiples of individual systems and installed on-site to produce cooling, heating, power and water.
Q: What fuel source does MultiGen use? A: The MultiGen System uses grid supplied natural gas but it can also be operated from biogas, bio-diesel, diesel, avgas and propane.
Q: Does a MultiGen System save CO2 and how much? A: CO2 savings vary according to the size of the system and, number of functions performed, i.e., water, air, water heating and power. For a small model like a MultiGen 30e 18kW – 10RT (water, air & power), under rating conditions, as much as 125 tons of CO2 can be saved annually.
Q: How are the financial savings determined? A: Financial savings resulting from the installation of a MultiGen System and the ROI are determined by incorporating the following factors: number of functions used (water making, air conditioning, water heating and electricity generation). The cost of grid supplied gas determines the cost to produce MultiGen electricity, which compares favorably to grid supplied power when adding in current and projected electricity tariff charges (PEAK & OFF PEAK). There also may be issues with grid supplied continuity or quality of electricity – other factors include required water supply, amount of carbon savings generated and the carbon price, the MultiGen hours of operation – ie: full-time 24 x 7 x 365 or in PEAK periods or business hours only, ambient average temperature, relative humidity and altitude. For example, more water is made at high temperatures, high humidity & low altitudes. Finally factor in the purchase price of a correctly sized MultiGen system, the level of engineering required for integration into existing sites, projected annual increase in electricity, gas and water charges – eg: electricity increases at about 13% p.a whereas gas increases by about 3.5% p.a., and you can calculate the economic benefit of the MultiGen Systems.
Q: So, how does a client decide whether MultiGen is for them? A: An initial free analysis of a client’s energy consumption data and associated costs usually indicates the potential level of environmental and economic benefits from the integration of MultiGen technologies. On-site generation of water and electricity improves reliability of supply and can also act to buffer the effects of future increases in utility tariffs while reducing current peak demand and capacity charges and, provide a reliable supply of supplementary high quality electricity, water, air conditioning and water heating. Each client and site have a different set of requirements. MultiGen Systems must be correctly sized and integrated to maximize the benefits for each client and site. In order to predict the level of benefits, investment requirements and payback period with a reasonable degree of accuracy clients are advised to undertake a comprehensive feasibility study at each site.
Q: How reliable is it? A: There are some 8000 turbine co-generation systems operational worldwide using the same engine we use. The turbine component is very reliable with only minor services every 8,000 hours with a major every 40,000 hours. (5 years of operation). Air conditioning/water making components are standard in longevity. There are about 12 million diesel generators in the MultiGen scale operating in the world and many of these can be adapted to the MultiGen System using an owner supplied Diesel generator.
Q: What power sizes is MultiGen available in? A: MultiGen Systems are available in 30kW, 65kW, 130kW, 195kW, 200kW, 400kW, 600kW, 800kW & 1000kW microturbine configurations and every 50kw and above in a diesel configuration.
Q: Can it operate outside? A: Yes, most systems are installed outside . MultiGen Systems can be installed inside provided there is adequate ventilation in the systems room. The water maker component relies on fresh air to enable the water making process.
Q: Can the system supply hot air as well as cool air for winter? A: Yes, with the addition of a heat exchanger to utilize a waste heat source.
Q: What effect does a hot day have on the system? A: In adverse weather conditions over 32degC, we offer a pre-cooler which can operate from the water we manufacturer in temperatures over 35C. .
Q: Can you sell the excess power made in off peak back to the grid? A: There is a big move towards this in many cities and countries and depends on the geography. The power generated is clean power and as a result is welcome back into the grid. Most states and countries are looking closely at this form of on-site generation as they have done with solar power – now regularly being connected to the grid.
Q: What sort of water is made in applications? A: The water manufactured is clean and cool but not certified as drinking water as various countries and states have their own standard for drinking water. A simple UV filter needs to be installed to suit local government guidelines for human consumption.
Q: Can the system Heat water on site? A: Yes, The system can alternate between heating water and manufacturing water from the air or cool air conditioning.
Q: What is the overall objective of the MultiGen? A: To economically reduce the use of grid-connected power, reduce GHG emissions, provide cooling or refrigeration, and conserve water.
Q: Can you use a MultiGen to simply replace the water heating commonly found in the form of Gas Boilers? A: Yes, MultiGen Systems are available in a simple all in one co-generation system that makes electricity and uses the exhaust gas heat to pre heat the boiler water, thereby reducing the raw energy needed to heat the boiler water.
Q: What is the Government prediction for electric and water prices in the near future? A: Generally it’s believed that electricity and water prices will both double in the next 4 years in most developed countries
Q: How does MultiGen compare to a Solar PV installation? A: MultiGen Systems produces up to four energy products – electricity, water, cool air or refrigeration, and heat – while solar only produces electricity. The capital cost for a MultiGen System per kilowatt is much less than Solar PV. While the ROI for Solar is many years, MultiGen Systems often achieve a payback in 4-5 years or less.