Study on optimal operational planning of an advanced co-generation system on a hotel’s energy demand

Abstract

In order to empirically study a cogeneration system, an advanced co-generation system (ACGS) was built in Waseda University in 1999. The ACGS consists of a gas turbine system, a steam turbine system, an ammonia-water mixture turbine system, an ammonia absorption refrigerator system and an ice storage system. In the bottoming stage of ACGS, by activating an ammonia-water mixture turbine system and an ammonia absorption refrigerator system, both of which are effective for heat recovery of low temperatures, the system is made up positively using the heat cascade, which is unique compared to other systems. At present, for the introduction of the co-generation system, its practicality is not fully considered and a method has not yet been established which would lead to an operating method fitting the characteristics of the customer requirements. So it is considered very important to propose the most suitable system construction, taking an overall view of the annual earnings and cost of energy for the customers. In this paper, we cover an assumed system which changed the part of composition of ACGS and, in order to find out the initial advantages of the system, seek the most suitable composition and the most suitable operational planning of a system for cooling, electricity and heat demand of a typical hotel, and then propose an example of the system design guide.

Net-zero Carbon Emission Hotels: Are they Technically and Economically Feasible?

“…The author stated that solar thermal energy and solar photovoltaic energy combined with heat pumps could cover all the energy demand in heat, cooling and electricity in summer operating hotels in Mediterranean region. Tomizawa et al, 2007 [19] have studied an advanced cogeneration system covering the energy demand in hotels. The authors stated that the co-generation system can generate heat and power during the winter while in the summer the produced heat can be used for cooling production.…”

“…Nearly-zero energy hotels and net-zero emission hotels can be achieved with the use of low-or zero-carbon emission technologies (Zeiler et al, 2016, Vourdoubas, 2015 [2,17] . Distributed electricity generation technologies are already used in several hotels worldwide (Tomizawa et al, 2007, Mengpei Chen et al, 2014, Smitt et al, 2021, Vourdoubas, 2021 [19,21,22,24] . Hotels can also offset their carbon emissions with the existing carbon offsetting schemes (Tsai, 2020, Waring et al, 2020 [25,26] .…”