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A new low-cost collector has been conceived for solar heat for industrial processes: the SunDial. This collector seeks cost reduction by means of an innovative design that must carefully address the important effects of cosine and end losses. An in-house Monte Carlo Ray Tracing code is used to asses these effects for different configurations: one only field where as wide as long (8 m) or two parallel fields 4 m wide and 8 m long, so that the total reflecting surface is the maintained. In addition, these configurations might be tilted or not. It results that a low tilt of the field might help to reduce importantly cosine losses, whereas in order to reduce end losses fields with higher length/width ratio are required. It is demonstrated that, for primary mirrors length of 8 m, the receiver length required in order to limit end losses to 10% of the impinging energy is between 8 m (two narrow fields tilted 10 deg) to 11 m (one wide horizontal field). This study leads to a design methodology that will be used in the construction of two prototypes that will be built for two different end-users in the framework of the H2020 project ASTEP (GA 884411). [ABSTRACT FROM AUTHOR]