Elieser Tarigan

Performance test of a grid-tied PV system to power a split air conditioner system in Surabaya

Air conditioner for cooling air is one of the major needs for those who live in hot climate area such as Indonesia. This work presents the performance test of a grid-tied PV system to power air conditioner under a hot tropical climate in Surabaya, Indonesia. A 800 WP grid-tied photovoltaic (PV) system was used, and its performance was tested to power a 0.5 pk of split air conditioner system. It was found that about 3.5 kWh daily energy was consumed by the tested air conditioner system, and about 80% it could be supplied from the PV system. While the other 20% was supplied by the grid during periods of low solar irradiation, 440 Wh of energy was fed into the grid during operation out of office hours. By using the grid-tied PV system, the energy production by PV system did not need to match the consumption of the air conditioner. However, a larger capacity of PV system would mean that a higher percentage of the load would be covered by PV system.

Photovoltaic Solar Energy Simulation of Rooftops of a University Campus Buildings in Surabaya, Indonesia.

This work simulates and estimates the useful surface area of roof of the buildings of University of Surabaya for photovoltaic (PV) system installation. A representative building is used in simulation to calculate the panel capacity that can be produced by a roof mounted PV with grid-connected system. It was found that about 10,353 m2 of roof top of the university buildings could be used for panels installation. The total capacity of the panels is about 2,030 kWp or 2,03 MWp. The capacity consists of four roof directions, i.e., 630 kWp, 535 kWp, 668 kWp and 553 kWp respectively for NE, SE, SW and NW roof directions.

Study of PV powered air conditioning for a classroom of University of Surabaya

This paper discusses the interaction between PV and air conditioning and how this can be exploited for a classroom at University of Surabaya campus. A cost analysis of the proposed grid-connected systems are calculated, including total investment, payback period and levelized costs. The most efficient way to connect PVs and air conditioning for a classroom is through a grid connected system. Simulation result shows that a 12 kWp PV system and the new AC units of COP 4,0 gives the LCOE about -3,334 IDR/kWh.

A Small Scale Solar Agricultural Dryer with Biomass Burner and Heat Storage Back-Up Heater

This paper describes a small scale solar agricultural dryer with a simple biomass burner and heat storage back-up heater. The key design features of the dryer are the combination of direct and indirect type solar dryer, the jacket and gap enclosing the drying chamber as a hot gas passage, and the arrangement of the real bricks in the heat storage system. The overall thermal efficiency of the dryer, tested for drying of some different agricultural products, was found to be in the range of 3% — 13%. The overall thermal efficiency of the biomass back-up heater was found to be about 20%.